Skip to comments.Experts: L.A. Quake Fault "Capable of Massive Temblor"
Posted on 03/18/2010 11:11:48 AM PDT by Touch Not the Cat
The moderate earthquake that struck the Los Angeles area Tuesday likely occurred a long a fault that could generate a much stronger, major quake in the future, according to scientists.
Seismologists say the Puente Hills thrust system could touch off earthquakes up to magnitude 7.5 directly underneath downtown Los Angeles. Such temblors would prove larger than any in the modern history of the Los Angeles Basin.
The Puente Hills fault, which winds through the area's fractured underbelly for about 25 miles -- from northern Orange County to Beverly Hills -- has generated at least four earthquakes ranging from magnitude 7.2 to 7.5 in the last 11,000 years, according to a study published in the journal Science.
"The bad news," the report said, "is that when the Puente Hills thrust fault ruptures in an earthquake, it tends to do so in a very big way."
Tuesday's magnitude-4.4 quake struck at 4:04 a.m. and was centered 1 mile east-northeast of Pico Rivera, according to the U.S. Geological Survey.
There were no reports of serious damage or injuries.
Residents as far away as San Diego and Santa Clarita reported feeling the quake, which consisted of some rumbling and a quick jolt.
Seismologists have not determined which fault was responsible for Tuesday's shaker, however, Daniel Ponti of the U.S. Geological Survey told the Whittier Daily News that it was likely on the Puente Hills thrust system.
(Excerpt) Read more at ktla.com ...
The entire state is at as much risk, but of course its always all about LA.
They’ll probably get extra money from the feds to deal with the earthquake like Hawaii had.
Puente Hills? They’re the Whittier Hills to those of us from Whittier.
“Seismologists have not determined which fault was responsible for Tuesday’s shaker”....
In other words....Which fault is at fault?
I see the word “thrust” in this story, and I also seem to recall it associated with the recent Chilean quakes.
Is this “Puente Hills” fault the same as the one in Chile?
Bush’s Fault is at fault, of course.
I'm no geologist, but that's easy. It was Bush's Fault!
That’s because they are talking about the fault which had the quake this week. No one disputes that all of CA and the Pacific Northwest are at risk ... but from other fault lines.
God: “How long can you tread water” Ha, Ha, Ha.
Haiti. Chile. California. Earthquakes in diverse places.
The main faults all down the west coasts of both continents are of the strike/slip variety, but there are all kinds of tertiary fractures associated with the pressures they generate.
LA will get eaten for lunch someday.
This has been known forever.
And it will happen again and again and again as long as there are active faults in the area.
The story could've been written the same way about any other fault in the state.
D*** George Bush for causing all these quakes! But at least he is learning the importance of being multi-culti...
Thrust faults push one layer under the other. i.e. the movement is perpendicular to the fault line. There tends to be a lot of vertical motion.
Don’t you know? It’s BUSH’s fault.
Did you see the name of the new fault?
. . . . get ready . . . .
A thrust fault is just one of the ways the earth slips. There are faults all along the coasts where the plates meet. All different kinds. All of them are Bush’s fault, of course.
No kidding. What’s the “experts” next feat of cranial wonderment? Predictions of snowfall at the North Pole?
Dear Big One:
Get it over with!
Seattle is due for their 300 year ~9.0 magnitude quake since the last one was in 1700CE.
Who will get hit first? L.A. or Seattle?
Chile lies alongside a subduction zone where oceanic material is subsumed back into the mantle. Foci are relatively deep, 35 to 200km or more.
LA from roughly San Diego north to Crescent City is “transpressive” with strike-slip and thrust faults, mainly shallow focus to about from 5 to 15km or so. I’d rather live here than there.
Here we proudly post BC, leave that lib crap out.
CE is Christian Era or Common Era.
BCE is Before the Common/Christian Era.
Jews use it and no one else that I know of.
Why, Bush's fault, of course!!!
Ping to watch later.
The quantified predictions are the equivalent of Global warming conjecture. There is no way the man knows what he said.
Libs use CE and BCE, it's the politically correct dating system, I know what it stands for.
I have never seen Jews use anything but Before Christ or Anno Domino, BC and AD.
They are still searching for one named Bush's fault.
PING to the thread.
And Jews are the ones who have a disproportionate amount of influence on other cultures because of the trends they start.
Why do you think Jews would use BCE and CE instead of AD and BC? Think about it for a sec.
Being an incurable nerd, I got an app for my i phone called Quake Watch. The daily number of very small quakes in California are amazing. Responsible are a profusion of volcanic areas and fault zones which don’t necessarily affect each other.
It does kind of bother me that while 4.4 is NOT a big quake, usually even those have aftershocks. So far this one hasn't.
It's making me a little nervous.
It was a little deep for this area at 18.9km (11.7 miles). ‘Could be that relatively small motion is tectonically locked in down there, thus no after shocks. It could also be that this event was an aftershock of several others over the past 10 years or so. Though undoubtedly it’s a sign of accumulationg stress along at least that part of the overall SoCal system, which will eventually bust out somewhere therein sooner or later.
Sorry, I don't know any lib, self hating jews, you think about it.
Thanks for the Ping.
This Whittier fault line is capable of producing what is called a “Super Shear” earthquake, where by the “Shear” or S/waves are channeled is such a way as being able to over take each other. What causes this is that the waves actually break the sound barrier while they are propagating outward from the fault quake.
There is much debate on what this actually means to the overall resulting damage from a quake, but it is thought that it holds the key as to why in some slip/strike earthquakes of the same magnitude, the damage is not.
I’m wondering . . . would you and your cohorts be able to conjecture productively about . . .
ASSUME that a massive, long mountain ridge is to appear with great suddenness over much of the length of California . . .
would you expect such a thing . . . and to run from where in the South to where in the North?
And where might subsidence or sinking be on the West and/or East of such a rising ridge?
my wife is going to love that tape.
One of my favorites as a young teen.
whoa.. very scary & very probable. Not if, just when
However, Quix I will answer your question in another post shortly.
I assume it would be a series of quakes—likely in rapid succession.
One source asserts that observers in the right place will be able to see mountains of a considerable height rise rapidly as they watch.
A pretty dramatic prediction.
I’ve long expected things that dramatic in the end times but have never run across anyone else who thought anything remotely like that . . . until the last several months.
Am curious what leads you to that conclusion. I haven’t ran onto many who have our perspective.