Tour of the San Andreas Fault thru San Bernardino
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- Опубліковано 28 тра 2024
- Take this road trip along California’s San Andreas Fault through the streets of San Bernardino, Highland, Yucaipa and Oak Glen, which are all cities within the region known as the Inland Empire east of Los Angeles.
Learn more about this road trip along the portion of the San Andreas at:
www.backroadswest.com/blog/san...
00:00 Introduction
04:40 More about the fault
09:00 Tools available for the tour
10:15 Start of tour
15:12 Seven Oaks Dam
19:22 Highland
24:35 San Bernardino
27:00 Devore
#sanandreas
#earthquake
#sanbernardino
#sanbernardinocounty
#cajonpass
Growing up in the area, I never knew how many times I was on the fault or in the fault zone. This is fascinating stuff.
Glad you enjoyed it. Thanks for commenting.
I'm from San Bernardino. I also never knew I was living and playing on the fault line.
@@BackRoadsWest1 It's a crime against humanity for there to be no mention of that fault in any of those government plaques. How many people will be slaughtered who never had a clue?
yeah, fascinating until you actually experience it. Scary as hell!
We lived on the fault in the Santa Cruz mountains during the 89 quake.. it was an unreal experience.. I’ll never forget the sound.
I was in Sunnyvale working for Lockheed when it hit at 5:04 pm. Jumped under the table as ceiling tiles came crashing down all around. First question was, where's the epicenter? If it's Los Angeles, they ain't there no more.
Couldn't resisted hiking deep into the Forest Of Nisene Marks to get pictures of myself standing in fissures. I'd be walking along the trail and noticed the ground getting soft and right up ahead there'd be a big old crack. Before standing inside, I'd poke around with a large stick to make sure I wouldn't get swallowed up.
P.S. Hurricanes here in Florida (Irma, Ian) and snowstorms of the century in New York (1966, 2013) are fun until you lose power.
P.P.S Silicon Valley almost never gets a good thunder storm. Funny to see people tremble at the sound of it.
I am aware of that sound I often hear about. I can only imagine as I will never experience it.
I really appreciate your hard work putting this together. I grew up in San Bernardino and Highland in the 1960s. I never realized how close we lived to the fault zone.
Glad you enjoyed it. Thanks for commenting.
My sister lived right on the San Andres fault for about 30 years or so. She went through a lot of scary temblors and I'm very happy that she's out of there before 'the big one!'
30 years? Wow! Boy is she lucky! I would've been gone yesterday. Lol!
Watching this from riverside in the inland empire. Living on the edge
I travel from the continental plate to the pacific plate and back everyday. I’m surprised California doesn’t put a sign stating “ San Andreas Fault” 😊
Check out our blog post that has a picture of such a sign in California: www.backroadswest.com/blog/san-andreas-fault-in-san-bernardino/
They have
That sign would trigger the Snoflakes. Can't have that. Feelings above all......
As stated by John Austin, the developer and chamber of commerce snowflakes (that's snowflakes with a 'w') put profits above lives. I remember how hard the Mammoth Lakes chamber of commerce and board of realtors fought the scientists who correctly wanted the public to know the town of Mammoth Lakes was well inside an active caldera known as the Long Valley Caldera...
I shop on the Continental Plate, but live on the Pacific Plate; gives me at CHANCE at having beach front property in about 10000 years.
I live in the Verdemont Heights area, just one freeway exit east of Devore. I always knew I lived in the fault area, but never realized that I'm walking distance from the fault lines. My friends and I would ride our bikes over all the scarps and spurs in our area when we were kids. Even today as an adult I still take my motorcycle or go hiking in those areas. I attended CSUSB and Cajon High, which is across the street from the Uni. Rumor had it the library for CSUSB and the boy's locker room at Cajon were built right on the line. Watching this video, I can remember where on both of those campuses I can see evidence of the fault zone.
A note on the erosion in the Devore area that you mentioned is commonly misconstrued as a scarp. There used to be a beautiful little KOA campground in that little canyon. My parents were friends with the managers and we used to ride our ATVs to visit them every weekend when I was small. A lovely little creek runs year round from there into a wash near my home on Palm Avenue nearby. As a result of The Old Fire in 2003 that left the entire mountain a burnt scar, there was a series of huge mud slides on Christmas day that year. Unfortunately, the KOA was completely wiped out and the managers of the campground were buried alive in the mud. My dad and I tried riding up there earlier this year on our motorcycles and it's a really rough trail now.
My friend Jose Navarro was one of the lost on that Christmas Day. We went to Del Vallejo together. I'll never forget him, he was just 12 years old. RIP to all of them
So glad I found this channel.
Back around 1965 I gave my dad a book called “Earthquake Country” for Christmas. It was published by Sunset Magazine and showed many of the features of the San Andreas and associated faults around San Bernardino County. Now, as it happened, my dad was an inspector for the FHA, and one day was scheduled to look at some property that was going to be developed for tract housing. He thought the area (near Redlands) looked familiar so he checked the book when he got home. Yep. One of the faults went right through the development property. His recommendation was for the FHA to not OK loans for new houses there unless a geologist was consulted. The geologist recommended against development unless changes were made in the tract layout. That was about when Dad retired, so he never knew if the builder changed the tract plan, or just built it without FHA loans being available.
That book sits on my bookshelf. One of the books that sparked my curiosity also many years ago.
Having lived in Yucaipa most of my 70 years, I am well aware of the faults in my area. Something that you might be interested in, the original plans for the Greenspot dam was to be a lower dam that was a C shaped that would extend out towards the Highland area. It was going to be a recreational area. But the locals (me included) protested because the dam would passed over the fault(s) twice. SB County finally relented and built the dam that we have now. Here in Yucaipa, very few people that live here realize the fault is in the north part of town.
Lucky for me, I'm on the south edge of the fault, between Oak Glen & Zanja Peak.
Yeah I am aware of the fault line going through there as we made our way up to Big Bear Lake thru Yucaipa. Really beautiful back there where the fault carved out an entire valley, canyon. But extremely dangerous when the thing finally slips.
It was fascinating to learn about all of the little "signs" and "clues" (geologic features) that the San Andreas has left around the local landscape to let us know that it is here. Once you know what to look for, it is a bit hard to miss. For example, the long skinny parcels of "park" areas in some of these neighborhoods are actually just fault line that builders could not put homes on. Apparently many people have no clue that they have a fault in their backyard (literally), or directly under their structure. My anxiety has increased significantly after watching this. Ignorance is bliss!
It would be interesting to see a similar series on the San Jacinto Fault. It has been more active than the San Andreas Fault South East of San Bernardino.
I live near Elsinore fault base of Santa Ana mountain
My thoughts exactly. I wanted to see what kind of feedback I'd get and you answered that for me - thanks! Unfortunately, I don't know much about the San Jacinto, other than it seems related to several other faults that line up. Perhaps it's time to do some research...
This video was so well put together and obviously required a ton of research 👏🏻
Thank you! Actually, not too much research. But I have lived in the area (Victor Valley) for 30 years and attended lectures, field trips, etc., and just heard a lot, about the San Andreas in general. So it's accumulated knowledge. Plus, we spent 2 days video & photographing the imagery in the video.
As you said, the San Jacinto fault is more active than the San Andreas fault. NE of the 210 and 215 junction is a large hill. It's about 200-300 feet above the surrounding plane. Little Mountain Dr and Ridge Line Dr are a couple of roads on this isolated large hill.
I think that this hill is an inselberg, one of the largest in the area. I think that it was uplifted by the San Jacinto fault squeezing the land between it and the San Andreas.
Nice! This comment led me to look up what an inselberg is . I lived right by the hill on Kendall Drive. We would hike and go to Blair Park all the time . Thank you!
It is a very rare house-buyer who orders a geological report, much less read one and understand it, for the property they are to purchase. Not just faults, but flood zones in particular are often ignored.
Correct. Or not checking if there are plans to build a freeway in your backyard, which was the case for the neighboring 210 Freeway in the 1990s.
Can homes that are built on the fault line be effected by insurance policies? How can one secure a plan?
That should never be the case, but it is all too common due to city officials and developer corruption.
The property developers should have to supply potential buyers with reports on fault location and other risks like flooding.
Actually, the escrow paper have the geological report requirement, but can be waive red by the owner!
As an ex Riverside San Bernadine resident of 20 years I had forgotten that I had heard much of this from local media. Great stuff great job.
Thank you and thanks for commenting!
These videos require a lot of research and lots of combined skills to put together. Very impressive! You deserve a lot more subscribers.
Thanks for the kudos! The subscribers number is growing slowly but surely...
There is a website that actually shows the red line of where the fault line is EXACTLY. You can even see if it's going through someones house.
@@hughdismuke4703With California's no fault divorce it perfect separation without having seeing lawyers.
I live in San Bernardino and this honestly is my everyday routes 😂 I never knew the San Andreas Fault was that close. What a beautiful educative video, this made me have more love for Sb.
Thank you and thanks for commenting
This is wonderful. I did my own tour of the San Andreas from Palm Springs to San Francisco in 2015. It was a lot of guess work and not nearly as comprehensive as what you have done. I really enjoyed it. Thank you. I will look at the rest of the series.
That's quite a trek! My goal is to one day have a series of videos covering that route, but probably more like Salton Sea to Point Reyes. Thanks for commenting.
Really like the distinction you made between a fault line and fault zone. I'm a current Geophysics grad student at UCR and enjoyed how you paid close attention to detail when a lot of other people do not. I can say that everything you said here is accurate with one caveat: sag ponds: Not all sag ponds are spring feed. Most are actually created with a divergent step in the fault, as the fault is not a continuous line or zone. The divergent stepover causes the land between the two strands to create a depression where rain and snowmelt can collect. Just something to keep in mind when looking at sag ponds :)
Glad you enjoyed the presentation and thanks for the critiques. Yea, rather than saying "spring", I should have used the words "trapped groundwater". But I didn't know that about sag ponds forming from the depressions caused by faults. Makes sense; they're a low spot. I'll bet there used to be a lot of sag ponds between Oak Glen and Palmdale, but human development has sucked the water away. I would normally spend more time explaining more details, like the grinding action of the fault creating a barrier for water, but I also try to keep these videos to around 30 minutes. Thanks again for the review.
You're livin my dream! San Bernardino County.
240 views, 35 min. excellent explanation / map / visual tour. best I've seen. I posted this on a arrowhead page on fb. I expect there will be a uptick of views and responses. thanks for the great work.
Glad you enjoyed it! Thanks for sharing on your page.
I was in Highland in 87 and remember watching a small wave maybe 4 inches high flash across football field during small quake. Thought it pretty neat until I found myself in 89 Loma Preita …. That was terrifying and I was 90 miles from epicenter!
Most of San Bernardino Valley College had to be rebuilt to accompany being on the San Jacinto fault zone. It cuts diagonally right through campus. I attended during remodeling. 2006-8. the slight hills make sense.
Really? I didn't know that. Looking at the map, I see exactly what you're talking about. Thanks for pointing this out.
@@BackRoadsWest1 I remember having two separate classes in the older buildings where there would be very very slight shaking 1-3 times a month. One professor was straight up and said go check out the seismograph on campus afterwards. The other just said is was just due to the construction lol (2008)
Good video. I love going to locations like these to see geology in action.
I've found that people shut off their brains when they're told anything like this about where they live. I've met several people who insisted Palos Verdes peninsula has no faults, making it 'safe' from earthquakes. One guy in Silverlake asked me about it, and as soon as I thought about it I realized his house was on the upperside of a very steep scarf right along his property line. It was on a short fault, so not much risk. When another friend just bought a house he woke me up to ask about faults in the area. His new house was in the foothills of the San Gabriels -- the street name sounded familiar. I was telling him about the faults and how far he was from the San Andreas as I brought his location up on the computer. As soon as I saw the nearby storm channel I remembered where I'd heard his street mentioned: John McPhee's The Control of Nature - in the section about flash floods. I suggested he not worry but consider sinking a steel pole in the backyard and making a treehouse for his kids - so in case of a flash flood they could take refuge. He never spoke to me again.
As a teacher I was to teach students about earthquakes. So we looked out the window (we were on the 5th floor) at what we could see of the location of the Hollywood Fault. Later I was scolded. I was to make earthquakes relevant to students, but not scare them. They weren't scared.
Thank you. If you look at a geologic map, the peninsula gets its shape from the Palos Verdes Fault, which runs parallel with all the other faults related to the San Andreas (e.g., Elsinore, San Jacinto, etc.).
Wow this is scary! Living behind Walmart in San Bernardino and watching this is gnarly. I guess I just have to wait and see
In the Bay Area I’ve seen houses, apartment buildings, and other structures literally built on both the San Andreas and Hayward Faults. And the Hayward in particular is one of the ones in the Bay Area most likely to cause a major earthquake. The San Andreas up here is still building up strain that was released in 1906.
@@christianvalentin5344 same thing in desert hot springs, near palm springs , the fault line goes right through subdivisions
@@califdad4 yeah those people, and the ones in the video are totally screwed once the southern segment of San Andreas finally goes. Full magnitude 7.9-8.0, and they’re literally right on top of it.
@@christianvalentin5344 after a geologist customer of mine told me to check it out and I checked it and the fault line comes out of the hills and angles across Desert Hot Springs, just past the high school and goes right through the Mission lake's country club development through a gated neighborhood just above it and follows the mountains to San Bernardino. I had wanted to buy in that Mission lake's neighborhood.
Great video as usual. As a resident over the years of Palm Springs, Desert Hot Springs, Banning and now Hesperia, I have done lots of exploring on the fault. It is amusing that so many residents have no idea of how close they are to it. Thanks for the tour!
You're welcome. Thanks for commenting. Used to live in Spring Valley Lake and did the same (exploring the fault) since the 1980s.
Developers didn’t think building houses on a fault line was a good idea? “Ya think?”
But, overall one of the best videos I have seen on the subject! Keep up the great work. Enjoyed watching and learned things.
Glad you enjoyed it! Thanks for commenting.
It's hard not to notice that the houses on the hills alongside the San Andreas fault are overwhelmingly very nice. Until The Big One hits, they’re living it up!
Kinda interesting seeing my trail mentioned in this video. The Highland Natural Parkland Trailhead. I've walked all up and down that trail, there used to be old turn of the century earth movers, around the end of that trail, and an abandoned train car. Most of its gone now. Got lots of nice spots where its great to watch the sunrise. There's also spots where it overlooks a creek. Some locals even made a swimming hole in said creek. Great area, its where I went to clear my head.
I didn't know anything about that place, so thanks for sharing. Interesting to hear about the old equipment and train car.
This is meant in the kindest way. You sound very much like Huell Howser. And I can see him doing this kind of presentation. As a native Southern Californian I have experienced a goodly share of earthquakes. I till people that we don’t own land. We owe space and the land kind of shakes through. If you’re lucky enough to get to take a train ride through Cajon pass you can truly see California’s conveyor belt.
LOL - thanks for the comment. I grew up in Burbank watching PBS. Part of my inspiration for making videos like this comes from Huell. So I can't help Huell's enthusiastic voice shine through! I've noticed that people either love the style or not. I also create software training videos for a living, so I don't let Huell come through on that, otherwise nobody would learn!
Love these, thank you
You're welcome! Thanks for commenting.
i grew up about 1½ miles from the San Andreas Fault in San Bernardino. My wife grew up only 0.6 miles from it, and her brother bought a house within the fault zone.
This is awesome. Thank you for this informational video.
Wow, this is very interesting. I live in East Highland right by the water reservoir near Highland Ave and Clover street.
We bought a new house in Palmdale in 1993 and they had to disclose that it was built less than two miles away from the fault. Even as a kid I remember those documents. We played in the desert behind the tract of homes and there were HUGE fishers along the fault that crossed the desert, they were about 10’wide and about 1-3’ deep. Scary stuff. Ironically I had a neighbor that moved from Northridge to Palmdale because of the earthquake and bought they home on a fault line again 😢
Right. We had the same issue with our house in Apple Valley, even though we were over 20 miles from various faults including the San Andreas. There simply isn't enough info out there on the internet about the locations of these faults, other than maps. Then, normal people are typically not interested in learning about it anyways.
Outstanding reporting and knowledge of details Thank you for this video .
You're very welcome!
Very interesting. Explains why San Bernardino is so affordable! I'm sure most of the nicer homes are engineered for this type of condition.
It's so affordable because it is the slums.
Excellent! What a fabulous endeavor to fly us over the fault. I may need to stay up late tonight and watch the entire series .... maybe tomorrow after turkey. Thank you for creating these informative videos.
You're welcome and thanks for commenting. I hope your turkey was good - ours was!
Very scary...I just have to mention how clear the weather was the day you photographed this vlog. Unusually clear. Also sad I bet most people in this area of San Bernardino that live on top of the San Andreas fault haven't a clue they do. Doesn't that important information have to be disclosed at the time of purchase of the property or home?
Yes, it was another day in "paradise". But it looks like that all over the Southwest. Thanks for commenting!
Most people rent…
Must be in the winter months! Sky looks exceptionally blue.
Pretty cool hearing all my familiar cities names
The Fault that goes under the 215 and 10 freeway interchange also goes next to or under the National Orange Show which is now the Location of Several 100K plus attendance Concerts including "Escape". A Halloween Themed festival more popular than UC Santa Barbaras Halloween block party from the past. What would happen if that ruptured during a Festival? Hmm
I have lived for the past 3 years near the Newberry Mem park. I had an emergency water, food cache in the back yard. But I have since had to move to a nearby rental. It's difficult to see the fault in this area as rich people in big houses are afraid of strangers and have restricted access as much as possible.
Very interesting. Thank you for the lovely tour.
Glad you liked it. Thanks for commenting.
Gah!! I love this shit!! I should have been a geologist but I'm soooo bad at math. Thank you for this endlessly fascinating series.
You really don't need to know much math for geology ;-)
I’m a geology graduate from UC Riverside. In one of the study cubicles at the Physical Sciences Library was a little inscription. “I started out as an engineering major but couldn’t handle the math…I’m now a geology major”. For a geology BS degree all you needed was a year of calculus. Great video!
I’m getting ready to do the tour. Thank you for doing all the work to help me on this journey
My pleasure! Enjoy your tour...
This is such an amazing video! Thank you!💕❤
You're welcome - thanks for commenting!
Thanks for the tour
You're welcome! Thanks for commenting.
Boy! Are they going to get a big surprise . Thanks for the video very interesting.
You're welcome and thanks for commenting!
Excellent, the previous video on the San Andreas pointed out Lone Pine Canyon and the nearly invisible road that you can pick up off 138 right near the 15. I took that gorgeous drive through Lone Pine Canyon past the ranch where the Earp's had stayed so many years ago. That road dumps you right into a residential district in WrightWood. A drive worth taking. Thank you.
You're welcome. Yup, that's a nice drive that not many people know about.
Another excellent video!
Amazing videos, Thank You!
You're welcome. Thanks for commenting!
Great video, fascinating information, clearly presented & I like that you get directly into interesting information.
Thank you! And thanks for taking the time to comment and provide feedback.
this video scratches an itch in my brain soooooo well. my favorite youtube video ever.
Thank you! We'll be starting production on another segment in a few months...
FYI, correct pronunciation of JACINTO is "Ha SEEN To" (not Wa Sin To) and VALYERMO is "Val Yair Mo." If you're able to revise the audio, thanks. Great video!!! I live in the region and it's so important to know exactly where the San Andreas fault is!
Thanks for commenting and your feedback. I've been up the Palm Springs aerial tramway several times and have always heard it pronounced the way I say it, and lived in the Victor Valley for 35 years and always heard Valyermo pronounced the way I said it. Probably because it's the American English (or local) way of pronouncing these names, just like Mojave, which we all mispronounce.
thank you for the great history and this great video....
You're welcome and thanks for commenting!
I used to live in Riverside and I had no idea that the fault line ran through San Bernardino! Someone said Riverside sat on one of the fault lines' branches when we had a little shake of 4.8. We left right after that!
My goodness what information., Much needed. Knew about the fault coming thru San Bernardino county and parts of highland.
good video, thanks for making it. i just hope many , that NEED to see this DO SEE it
Glad you enjoyed it. Thanks for commenting.
Amazing video, the Elephant in the room so true!
It's amazing that communities don't put up signs showing where the faults are located. Here in San Diego, we have "Fault Line Park" in downtown. It even has lines painted on the sidewalk to show you where the Rose Canyon Fault is located. At the north end of the park facing north, you can see that condos were built on either side of the fault with the fault being green space between them. Very interesting and entertaining video. Thanks for posting it. Looking forward to your next.
You're welcome and thanks for commenting!
Wow! I live in mentone, had no idea all this time how close the fault is!!! Great work, very informative!
Mentone Beach huh? Glad you enjoyed it! Thanks for commenting.
Very interesting. 😊
As a local to the area in this video... San Jacinto .. the J is pronounced as a H in spamish and not a W ... so it would be San J (H)acinto....
Oh, that's right. Thanks for the clarification!
This was an excellent video.
Thank you!
You went right through where I grew up. I did know about the fault.
Great video and would love to see one done covering the Hemet San Jacinto area. Btw the J is pronounced hacinto not wacinto
Such a cool video!
Thank you
I wish I could have seen you. I live on the fault zone at the top of Sepulveda Ave. And you just passed my house. Could have shown you a few things here. Good vid!
Wow! I lived and worked in Highland for 12yrs and never knew I was living on a time bomb!! I felt many small quake's nothing big thank God!
An interesting video, as always. It seems that a lot of people have no idea of their proximity to the fault. I've never experienced an earthquake. Believe it or not, we sometimes get small ones here in NJ. There is a noise like a sonic boom from a jet, but no shaking to speak of.
Thank you! This is a video I've always wanted to make as I've seen people living unaware for so long.
The two earthquakes I've experienced living in NC have both been in the last 10 years, one of them waking me up from sleep. In both cases, my parents who live a few blocks away noticed nothing. Both were on the level of the tremors I experienced while visiting Los Angeles, which I’m sure would barely rise to the level of smalltalk for born-and-bred Angelenos.
I always knew the San Andreas Fault was near us but I didn't know it was that close. And this video is recent😁
Most of the imagery was shot December 2021.
Ignorance is bliss. The property owners tell everyone that they have mountainside homes with stunning views, neighborhood ponds and natural green spaces. Our neighborhoods are a great investment and perfect place to safely raise a family. Never mind my fence line having an offset and constantly needing repair.
Sad thing is even though I’m a hick from Kansan I’ve known and traced the San Andreas and know the signs of it. All the way to Pacifica at the entrance to the San Francisco Bay and out into the Pacific Ocean. Same signs and features are presented.
Thank you very much for sharing this. You know what would be cool? Placing geocaches along those stops as part of an educational tour. If I lived closer I would place them myself. Instead, I live in another geologically significant area of California; Ridgecrest. Not quite as interesting as the San Andreas, but there is the nearby Garlock fault and the network of faults that make up the Eastern Shear Zone which was responsible for the 6.4 and 7.1 earthquakes we had in 2019. Unfortunately a lot of that fault mapping is on the China Lake Naval base property. There is still enough to look at outside of the base. The best indicator of the fault networks out here is the abandoned gold mines. It seemd the early miners knew more about the faults than the geologists of the day.
It is crazy that the City of Desert Hot Springs allowed the developer to build the house I bought back in 2005. I found out afterward it is directly on top of the fault zone and its entire area is predicted to liquefy if and when a major earthquake happens.It is the top house on (68887 Panorama Drive)
According to the same geological map you saw in the video (which relies on local County data - Riverside in your case), there are two branches of the SA Fault - one to the north of that address about 0.75 miles and another just north of I-10. When you say "fault zone", the whole town of Desert Hot Springs is in it. The fault becomes more defined as it goes towards Indio. Hmmm, looks like maybe I should create a video in that area next...
I really love this video with its full explanation of the San Andres fault. I usually drive on freeways 210, 215, 10, 15
I love the vow of the mountains and everything around this area. I hope one day earthquake will not hit while I am driving around.
Thank you! Just remember, when you drive around, the reason why a mountain or ridge is sitting where is, is because of a fault of some sort. That's why the biggest mountains around are next to the biggest fault - the San Andreas.
This is a very interesting tour. One thing of particular interest to me is the Indian casino and whether the new Highrise hotel was built directly on top of the San Andreas. Can anyone answer whether the fault line passes directly beneath the hotel ?
The geologic map plots the fault where I point it out in the picture with the guard shack. You can view all the faults using Gaia GPS, which you can purchase from here: www.backroadswest.com/blog/san-andreas-fault-in-san-bernardino/
This was really great! Can you do a video of the San Andreas through the Coachella Valley?
That might be our next tour. Or maybe from Palmdale to Gorman, where one can see the fault really well. Or maybe both...
Wowwww.. impressive development on one of America's predicted great mega thrust earthquakes.
I hope my friend Tom is all safe N sound down there.
Geologic history of the entire southern CA area is a night mare to reconstruct; in 1962-3, my geology professor, Dr. Dana, took his [our] class on a bus tour/field trip from the U of Redlands, Northwest, as far as Devore Canyon, stopping at many points of interest along the fracture zone of the San Andreas fault. In those days, we did not have access to Google Maps nor any current fault locations now available at the press of a finger. In the Devore area, he pointed out massive intrusions of black, metamorphic rock. He pointed out the fault lines visible to all of us. That black rock was Vishnu Schist--Earth's first and original crust--seen only in one other area of the US: the bottom of the Grand Canyon. There exists within that section of the fault about a 2.5 mile zigzag "Z" in the fault. It is one of the hardest, toughest rocks on the planet, and that zigzag is the lock-point of the entire fault movement--until the "Big One" when that rock suddenly shears. From Mt. San Jacinto/Palm Springs area and well past Phelan, CA, the pressure continues to build. Thermometers are placed in deep wells along that section of the fault to monitor rising temperatures... and they are still rising... hoping to gain a clue as to when the pressure might finally snap. For show-stoppers, the lower desert has moved approximately 30-40 feet from the Salton Sea towards Palm Springs since the Southern Pacific built its railroad through and across the fault. North from Devore, the fault has also moved about about 30 feet clear up through the central valley. When the SNAP happens, one can expect at least a 30 foot movement, suddenly. No, I do not ever plan to buy a house in Devore!
I'm following along with you, on Google Earth. It's amazing how many quarries, mines and gravel pits there are along this fault line. Just how overdue are we? Great tour. Thank you. Those people have no idea, they are on a fault line? Wow.
Interesting! 👽
I lived on Palm Ave in San Bernardino for 11 years. It turns into a forestry dirt road.
You can actually see where the road cuts through the fault.
I'm not even from California but I made it a part of my research (before I moved here) to know where the fault lines are in Southern California, and up north beyond S.F.. There is a site that shows EXACTLY where the line is at. It's a red line that you can zoom all the way down as close as the satellite images will allow you to, which is about 300 to 500 feet above the land. Close enough to get an idea if your house is exactly on the line.
Here in the Palm Springs area, specifically in the northern parts of Indio and especially through Desert Hot Springs, you can see the line go right through peoples houses! Sitting right on top of the most frightening fault line in California. Imagine sitting watching TV and suddenly the television part of the living room instantly shifts to the left while you shift to the right, ripping your house right in half.
You'd be lucky not to be instantly killed and if somehow you survive, imagine what a scary experience that would be? I can tell you that when I tell people we are only a few miles from the fault line down here in East Palm Springs region? Their faces are shocked.
Here are some facts as of right now. The San Andreas fault line is WAY overdue to have its next major eruption. It is deemed to happen at any moment, any day. The rip will be instant, approximately a 30 foot rip within one second. Anyone on this line, or near it will feel it first as the force will rip across the entire region on both sides of the continent. There will be a horrible roar and no one will avoid being affected by this major shake.
Those next to the line will not hear a pre-rumble as the rumble comes from the rip itself. They will get the worst of the initial rip. The rip will be instant, with zero warning.
Depending how a home is built, a lot of structures lower walls will be thrown out from underneath them and the roofs will collapse right on top of whoever, whatever is inside of the home. This is how powerful this quake will be. Being from the midwest, I cannot believe the California government has allowed ANY homes or structures to be built even within a thousand feet of this line.
Thanks for commenting. Glad you enjoyed the presentation. I wouldn't get too concerned. I've lived in So Cal from 1962 until 2015 and, during those years, I experienced 4 earthquakes. Nothing serious. Even if your house is on a fault line, more damage could occur many miles from the epicenter. Furthermore, "they" have been saying the SA fault has been overdue near Palmdale since the 1970s. Now the Coachella Valley has been overdue since like 1995. Bottom line, nobody knows. We'll see what happens...
@@BackRoadsWest1
This person says nothing to worry about if your house is on the fault line. 😨
Must be a real estate agent. Sounds like a real estate agent. I understand your position.
@@hughdismuke4703 LOL - probably smelled like a real estate agent too!! My wife and I were just talking about this. Those agents don't tell you about the earthquake faults or the freeways that are planned to be built up against your backyard, which was the 210 Fwy in the 1990s (which was planned since the 1960s).
@@BackRoadsWest1 😁
Would have been extra special if you could have shown us how Wrightwood and Oak Glen were probably right next to each other many millennia ago.
Good point! Some day, it will be L.A. right next to San Francisco.
@@BackRoadsWest1 Well, I have relatives in San Francisco I've been thinking of visiting. .. should I just wait???? Lol
22:50 - Orange St. / Holly Circle Dr. is a good example of the "microclimate" of Southern California. In one turn, you’re in the desert, in the next turn, you’re in a rainforest!
Welcome to California and its huge addiction to imported water!
I love all your videos. ESPECIALLY San Andreas. Picked some books to get more study material. Could you share what literature you use please. Planning my trip to salton sea. Mud pots!!!
Thank you! I can't really say I've used one or two sources. I've taken several classes over the past 20 years from area schools, such as the one showcased in the video (Cal State SB) and simply read a lot of Internet articles, and of course hearing a lot in the news while loving in the area (Apple Valley) for 35 years.
@@BackRoadsWest1 thank you for sharing your knowledge and research. My points of interest right now is the Salton trough and Carrizo plain.
I grew up a mile from the San Andreas Fault in San Bernardino near Waterman Canyon.
Is the pacific plate going under the North America plate
The used to, as a subduction zone. Then the San Andreas formed and its now a strike-slip fault, so both plates are sliding past each other.
@@BackRoadsWest1 There's not been (significant) subduction in this part of California for several million years. The question I've had is how long until the Pacific plate can no longer match the NA plate's westward relative motion. This gets to the debate over the Walker Lane and the future of the plates' boundary.
"Is the pacific plate going under the North America plate" - yes... in Alaska. In California - no, at least not now.
Bottom line, it's a long explanation. I'm sure there are videos on UA-cam that explain plate tectonics around the Pacific Ocean, or at least good articles on the internet.
@@TheDanEdwards Farallon Plate is an ancient ocean plate that is subducting under North America into the mantle.
Really enjoyed this geological tour. Do you have a similar one for any fault line near the CA Aqueduct Cascades, off the 5, near the 210?
No, the San Andreas is about 30-40 miles north of there. The cascade you see north of the 5 & 210 is not the Calif Aqueduct, it is of the L.A. Aqueduct coming down from Owens Valley and built in 1905 (amazing engineering - lots of videos on the topic).
@@BackRoadsWest1 Thanks for this info. I’ll check it out
@@BackRoadsWest1 Is there a fault that runs under or near this LA aqueduct cascades (@5&210) ?
@@gsimonin1 Although I passed by there a lot when I was younger (I grew up in Burbank in the 1970s), I'm not familiar with it geologically as I live in Utah now. Bottom line, and especially in California, where ever there are mountains in a relatively straight line, there's a fault. The epicenter if the 1971 Sylmar earthquake was close by there - just off the 210 & 118. There are several resources on-line for geologic maps showing fault lines, search for "geology map of los angeles county" or purchase Gaia GPS, as described in the video, to show the geology, which you can purchase from our website: www.backroadswest.com/blog/san-andreas-fault-in-san-bernardino/#TripMap
I lived in granada hills for the Sylmar quake. I was 12. we had to evacuate for a week or two because of damage to Van Norman dam. then I lived in Palmdale for the Northridge quake. but my sister lived in Reseda at the time. scarey!!!
Feb 9, 1971. I remember the day well. It may have had some impact on me from making these videos. I lived in Sun Valley and remember the scare of Van Norman Dam. As kids, we were out of school for 2 weeks!
At 29:21 you can see where the mountain range split and is sliding northwest. The SG mtns are sliding to the NW. The SG and SB mtns were a single mountain range a long time ago.
Good catch! We actually created an animation of the mountains on our first San Andreas tour: ua-cam.com/video/1vWvHaaMJnM/v-deo.html
Thanks again for a wonderful video lesson. Like shorting a stock price we can get some addresses and short the houses and insurance, 😆 🤣.
I live in Fontana…every time I look out my kitchen window, I see those mountains and think about how the SA Fault is right there
All homes sales in California are supposed to come with a Natural Hazard Report! It states where faults are and any other natural disasters and the proximity to your home. This is how people find out about it during the purchase.
I guess it's somebody's fault.
And, in my experience, so many people don't read escrow papers and just sign their name where asked. Their mission is to buy a house.
I have friends who live in Cathedral City. I love visiting them because their house is like a resort but the fault is literally 5 miles from their backyard. I used to live with them in Studio City when the Northridge earthquake occured in 1994 and I was almost killed. I've lived in NY since 1998 but I always worry about all my friends in California due to the quake threat.
I live in San Bernardino and I had no idea.
I was born and raised in San Bernardino. I lived by Cal State University in the 80's. Just one block north of us people were unable to purchase earthquake insurance.
I was looking at areas of Desert Hot Springs, about 8 miles north of Palm springs, and the fault line goes right through neighborhoods with some homes that must be on top of it
That might be our next tour. Or maybe from Palmdale to Gorman, where one can see the fault really well.
@@BackRoadsWest1 I was all ready to move there,( I live outside of Sacramento) and I had a customer who was a geologist and advised me to look into fault lines, needless to say I'm still in NorCal LoL
Visiting friends in the Bay Area, they took me on a tour of the fault line with multimillion dollar homes built on the ridges either side within 20 feet of the fault line. As they explained, the owners can't get earthquake insurance.
Yes, same thing there, only more valuable real estate. Have you seen our tour of that area: ua-cam.com/video/7hcP59KSLZ0/v-deo.html
a GPX file of these locations is epically appreciated- wish more people would do it
You must not have watched the entire video that explains and shows the GPX file. Watch it again. A GPX file, as well as a PDF containing the stops that you can copy/paste into your phone, is available here: www.backroadswest.com/blog/san-andreas-fault-in-san-bernardino/
@@BackRoadsWest1 I did watch it and said "is epically appreciated " and wished more people would do it
@@FatManWalking18 not sure what you mean, but it's at 9:35 in the video. Did you find it in the link I provided?
Thank you.....that was lovely.
And fun fact: up in the Bay Area, in the communities of Los Altos Hills, Woodside, and Portola Valley, there are homes worth tens of millions of dollars owned by some of the wealthiest people on Earth, that are built exactly on top of the fault. Like a frontal assault on Murphy's Law. Money cannot buy common sense.
Yes, I've seen them! Perhaps you've seen our tour of the Bay Area: ua-cam.com/video/7hcP59KSLZ0/v-deo.html
Excellent video!! Very informative..as a Yucaipa resident, I've always know if this section of the fault let's lose Oak Glenn, and Yucaipa will be especially affected by severe damage, possibly near completely destroyed. And just an FYI , the San Jacinto mountains are pronounced HUH CINTO HUHCINTO, the j is silent. Ive been hearing all my life having been born here about the big one is coming.....I'm 63 now hasn't happened. Hoping it wont. But this is totally out of our hands.
Thanks for commenting and your feedback. I've been up the Palm Springs aerial tramway several times (I'm 60), lived in So Cal for 50 years, and have always heard it pronounced the way I say it. It's probably because it's the American English (or local) way of pronouncing these names, just like Mojave, which we all mispronounce. And yes, over 63 years, nothing has happened, other than multiple fires destroying thousands of homes. Yup , it's totally out of our hand! But interesting nonetheless.
@@BackRoadsWest1 I was born here 75 years ago. I agree that your pronunciation is off. It is pronounced either HA Cinto or YA Cinto, or even JA Cinto depending on Spanish or Portuguese - I was in a meeting with someone from Jacinto Farms who pronounced it JA cinto, while I have been pronouncing it in a more Mexican Spanish HAcinto. Southern South America might pronounce it YAcinto. But NEVER! WAcinto. Otherwise great video!
Almost 30 years ago we took a field trip to the San Andreas fault line. We walked there from Hillside Elementary School. Fast forward to today, I still live on the fault line and don’t care 🤷♂️