Waiting For The Big One | 7:16
Peter Gabriel | 585K subscribers | 58,970 views | December 25, 2014
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 ...
I had a business trip to SF right after the ‘89 quake. I was shown an office where the floor had separated from the walls, just as it was designed to do so that the building wouldn’t collapse.
Good add, Mairdie!
Waiting For The Big One | 7:16
Peter Gabriel | 585K subscribers | 58,970 views | December 25, 2014
That's exactly not what they are saying.
My instinct in those days was to sit on the end of the bed for days on end and record continuously. I edited those tapes massively to get rid of redundant reports. I hope.
Ah, the Northridge was only a 6.7. I’m talking 7.8
lol...
Wonder if that’s why they want to ban gas stoves.
Would the water system even survive it? That’s some dry country, without a water system.
Back in 2010, just a couple of months after I moved here to San Diego County, a 7.2 hit just south of the border.
I remember hearing a train coming, but there weren’t any tracks near here! The walls started bowing in and out a bit and I finally realized I was in a good sized quake and exited the building.
I was ready to head back to Florida to face the incoming Hurricanes. At least I can run from those!
There was a major one in Missouri I believe in the 1800’s. Oklahoma had one several years ago and we felt it in Omaha.
They have been expecting a 7.5+ quake in the Tejon Pass area, north of L.A. - the effect on those remaining unreinforced masonry buildings downtown would be considerable.
My cousin just missed being crushed by one of those overpasses. She felt the jolt and the overpass came down right behind her.
That’s a good question. Much of the water supply pipes in the LA area are old and rotted. I’d guess a 7.8 would cause countless water main ruptures. And this isn’t good, because at that magnitude, there would be fires everywhere...
“and was looking at the water fly out of my pool.”
Spooky. We knew someone in the Fullerton hills whose pool was emptied by the Sylmar quake. The water hit their sliding glass door like a tidal wave and water plus glass shards tore through the house.
“…The area of strong shaking associated with these shocks is two to three times as large as that of the 1964 Alaska earthquake and 10 times as large as that of the 1906 San Francisco earthquake…”
I feel the same way, living on The Frozen Tundra. I’ll take a Blizzard in Winter or a Tornado in Summer; we’re equipped to deal with both of those!
Solid rock turning to LIQUID? Yeah, NO! ;)
Oh, Gawd! That’s a ‘Come To Jesus’ moment for sure!
In a truly big quake, the water system will not survive. Attended another briefing (a few years later in San Bernardino) where the focus was on a major quake on the southern section of the San Andreas fault.
Bottom line: the Pacific Plate will lift and move North, several feet at a minimum and probably as much as ten feet or more. Every aqueduct, freeway, gas line, railroad, and perhaps the electrical transmission lines will be severed. The LA basin will be cut-off from the east.
bttt
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