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Posted on 03/06/2023 3:12:17 PM PST by BenLurkin
The last “big one”-level movements in California’s recorded earthquake history are the 1857 earthquake in the central third of the San Andreas and the 1906 earthquake in the northern third...that’s not to say there haven’t been major earthquakes since then.
The 1989 San Francisco-area earthquake and the 1994 Northridge earthquakes, for instance, were both devastating and destructive shocks...
The impact that a large earthquake has, whether it’s a 6.5 or an 8.0, largely depends on the proximity to urbanized areas.
The southern San Andreas is particularly of concern for experts when looking at places that are overdue for an earthquake above a 7.5, impacting areas like San Bernardino, Palm Springs and Imperial County.
That portion of the 700 mile-long fault has not had an earthquake around that size in magnitude since about 1690...
But scientists are also especially worried about...the Hayward fault, which runs directly under cities in the Bay Area.
With these two areas of concern for seismologists, there are a number of potential scenarios that could play out in the earth’s crust – some of which could look a lot like the catastrophic, magnitude 7.8 earthquake in Turkey and Syria due to similarities in the way those faults are set up compared to California.
One such lesson is the potential for a “doublet” earthquake, or additional earthquakes triggered along nearby faults to one that has a “big one.”
The Hayward fault would be a candidate for a secondary earthquake that is dynamically set off if an earthquake, like a 7.4, were to hit in Southern California, she said, considering how much stress has already built up between the plates – mirroring what was seen in Turkey.
(Excerpt) Read more at ktla.com ...
On top of the fire demand, the body can’t do much more than 4 days without water.
I remember a big quake out in Landers that just kept rolling and getting stronger and stronger. That one doesn’t get much press because rattlesnakes and dirt were harmed most.
Great song, Great album.
Major roads down and no power or water. That’s a pretty poor situation to be in.
“There was a major one in Missouri I believe in the 1800’s.”
The New Madrid quake. IIRC it made church bells ring in Philadelphia and it made the Mississippi River flow backwards.
I know a friend who was in Big Bear during Landers...A short while later, Big Bear quake hit...He was staying at cabin with 5 other guys. They literally thought the world was coming to an end. Even a stream close by suddenly dried up...
If there is an earthquake in California, who’s fault is it?
Wait until the pools dry up.
The area of the San Andreas between Parkfield and Maricopa almost never shows any activity, even minor shakes, while areas north and south of there are always rumbling and grumbling.
While looking at other quake activity on the map it seems to pivot around that spot. There seems to be a lot of "equal and opposite" reactions ie a 3.0 at Petrolia followed by a 3.0 by the Salton Sea within a short time.
I have nothing concrete to support the following but I suspect, as an engineer, that there is a lot of potential energy being stored in the area where nothing shows and when it goes it will go with a bang.
Why choose? Let them all kick off together.
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SF is the worst place to be in “the big one” imho—especially since things have gone downhill there since the last big quakes
Also there is a large skyscraper that is leaning and they don’t seem to be able to fix it. My guess in a “big one” it will come down.
Much of the build up on the bay side is is re-claimed land and it will most likely turn solid ground into liquid when the big one hits.
https://www.usgs.gov/faqs/what-liquefaction
I hope they have video cameras watching the Millennium Tower 24.7. “TIMBERRRRR....”
After 35 years there, it got so we didn’t roll out of bed for anything < 5.0
I put an earthquake gas valve on the line downstream from our meter as soon as we moved in back in '83. It's a real simple gadget -- a ball gets knocked off its perch and lands on the gas exit hole in the valve. No moving parts except for that one ball.
We rode through the 1989 Loma Prieta quake just fine and it didn't kill our gas.
Note the low-tech "level" to get the valve properly mounted. Anybody living in EQ country needs one of these (at least until the GD government steals your water heater, furnace and stove)
Ai contraire, the Pacific Plate is lifting.
Supposedly.
Elizabeth ... I'm coming to see you!!!
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