Skip to comments.More prehistoric quakes on San Andreas Fault found (state very overdue for a "Big One")
Posted on 08/20/2010 7:33:14 PM PDT by NormsRevenge
Los Angeles, CA (AP) -- New research has found that more big earthquakes have hit California's San Andreas Fault in the past several centuries than previously thought.
The last major jolt to the Carrizo Plain segment of the San Andreas occurred in 1857 when a magnitude-7.9 quake struck.
Using radiocarbon dating, researchers from the University of California, Irvine, and Arizona State University found evidence of five other large quakes that occurred before 1857.
They calculated that the interval between the last six quakes was 88 years on average.
(Excerpt) Read more at sfgate.com ...
MEGaQuake Hits California!!!
Bush’s fault !
Obama worries me more
My understanding is that the fault through CA is actually a side-by-side, not an over-under. If so, this would mean that, although CA may suffer bad earthquakes, it will never “fall off” because of one.
Where the SA runs through the Puget Sound near Seattle, however, it is an over-under. While they do not make predictions of WA or Seattle “falling off,” there is quite a bit of evidence that the Cascade Fault creates massive damage every 500 years or so. And they are due for a return.
My goodness Norm, you are just a big bowl of sour grapes this evening and BTW... 7.9 is not large. I think the Tehachapi quake of 1952 was that or greater
7.9 is catastrophic in a urban setting. Tehachapi quake was a 7.3 very few people lived in that area
Thanks for that info. I like the pizza example below..
The San Andreas Fault is the sliding boundary between the Pacific Plate and the North American Plate. It slices California in two from Cape Mendocino to the Mexican border. San Diego, Los Angeles and Big Sur are on the Pacific Plate. San Francisco, Sacramento and the Sierra Nevada are on the North American Plate. And despite San Franciscos legendary 1906 earthquake, the San Andreas Fault does not go through the city. But communities like Desert Hot Springs, San Bernardino, Wrightwood, Palmdale, Gorman, Frazier Park, Daly City. Point Reyes Station and Bodega Bay lie squarely on the fault and are sitting ducks.
The San Andreas Fault is a transform fault. Imagine placing two slices of pizza on the table and sliding them past one another where they touch along a common straight edge. Bits of pepperoni from one side crumble across the boundary onto the anchovy side. The same thing happens with the fault, and the geology and landforms along the mighty rift are extremely complicated.
This has some info too..
Nature has an IOU with Kalifornistan’s name on it.
What will your surviving relatives living elsewhere call a 9+ which is possible also and I lived through the Tehachapi quake and moved north the next year when I have been through 6 or 7 in the 7+ range up here and we live with the threat of a 9 or better. Too bad they built mega cities on active EQ fault lines...
San Francisco and El Lay?
Couldn't happen to a better bunch of smug unconscious perverts.
I hate what they've done to the city of my childhood.
...with the six foot displacement in 1906.
Hey, let’s build a high-speed rail line right next to it!
Great idea!! 8-]
Sooner the Better............
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