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Old 07-02-2010, 09:47 PM
 
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Quote:
Originally Posted by californio sur View Post
More bad news. According to an article in the LA Times the Easter day earthquake has put more pressure on nearby fault-lines especially the Elsinore and the San Jacinto faults that run through San Diego and San Bernardino counties.

"Scientists say earthquakes now are more likely on those two faults, but because so little is known about them, it's hard to calculate the risks.

On Thursday, NASA flew a specially equipped Gulfstream III jet over the quake zone, looking for signs of Earth rupture that could help experts understand how the various faults are connected.

There are several key clues scientists were looking for during the nearly six-hour research flight, which covered such seismically active areas as the Salton Sea and U.S.-Mexico border as well as the San Diego coast. If data show slipping along the northern edges of the Mexican fault that triggered the 7.2 quake, that would suggest that pressure is being placed on faults in Southern California".

Earthquakes: Scientists seek clues in Mexicali earthquake - latimes.com
yeah I heard this on the radio. They talked mostly about how the Elsinore and San Jacinto faults could produce 7.0 or higher and that there is an increased risk of another signifigant quake. They didn't bring up the San Andreas and I think that is because they don't want people to panic. If that elsinore Fault or San Jacinto fault rupture, you bet we will feel it strong here in San Diego county
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Old 07-02-2010, 09:48 PM
 
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Originally Posted by wyatt_earp_fan View Post
In SnD it may have felt like a 4 or 5 if one had struck right underneath at a 4 or 5 magnitude. But usually the big rolling quakes that last very long means there was more likely a major quake that occurred some place several hundred miles away or a good distance of more than 30 to or more 40 miles beneath the earth's surface. The last good sized ones here , right before they hit there is a lot of vibration, kinda like the old vibrating beds when you put a quarter in, only more intense. I've noticed that when those instances happen, they are usually followed by a huge jolt or quake so if that happens in San Diego, you guys better get under something and hold the hell on. Pray to God that San Diego doesnt get one off shore and hope it is not a subduction type, like in Chile cause you're talking some major shaking if that happens. Even we Imperial Valleyites would get hit hard too. If more quakes occur in our area due to the Laguna and Elsinore faults, since they seem to travel upwards or N NW, a majority of the waves will be going towards San Diego and more of Northern Cal. Sucks to be you guys over there. I have, however noticed an increase in activity northward, specially in the Anza Borrego areas and small ones towards San Diego. I wonder if the Elsinore Fault is just making some elbow room after being shoved and cramped by the Laguna Sulada Fualt. I do remmeber back in 2007 or 2008 when we had the 5. that was centered just East of the 7.2 in Baja Cal, that set off all kinds of activity, aftershocks like every minute. Then the area of the Sulada fault started to show a lot of activity before it decided to bust, I am concerned and nervous about the Yuha Wells fault and that are where more aftershocks have been occurring lately right underneath Ocotillo.
Very informative post.
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Old 07-02-2010, 09:51 PM
 
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Originally Posted by Gentoo View Post
Oh no, I meant it didn't feel like a 6 here. I'm sure it felt like that in El Centro. Growing up in the Bay Area, we had quakes almost every day at one point when I was younger. I know what a 5 feels like and it didn't feel like a 5 to me here in SD. A good 4 for sure though.
I am not talking just the city of San Diego, I mean the county too. I live in East County meaning it would feel stronger than it would downtown. What I don't get is why things here all over san diego fell down if it was only in the 4s?

that El centro video is freaky because of the cars. It looks like "2012" lol

Last edited by BacktoBlue; 07-02-2010 at 10:02 PM..
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Old 07-03-2010, 12:32 AM
 
Location: San Diego, California Republic
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Originally Posted by caliguy19 View Post
I am not talking just the city of San Diego, I mean the county too. I live in East County meaning it would feel stronger than it would downtown. What I don't get is why things here all over san diego fell down if it was only in the 4s?

that El centro video is freaky because of the cars. It looks like "2012" lol
I see what you mean now, I misunderstood. A 4 could still be strong enough to knock some things down. However now that I know you're in east county, I will not tell you how you felt it anymore lol. My girlfriend lives in Rancho San Diego and I know she feels them stronger than I do. She's even felt aftershocks I wasn't aware of.
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Old 07-03-2010, 06:54 PM
 
Location: SoCal
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Originally Posted by californio sur View Post
You are correct. The first shake starts off relatively gentle followed immediately by heavy jolts. But the Northridge earthquake hit like a hammer from the start.
As did Whittier Narrows (way back in the '80s). I wonder if that's what happens when you're close to the epicenter.
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Old 07-03-2010, 06:57 PM
 
Location: SoCal
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Originally Posted by californio sur View Post
Yeah, San Diego is historically safer than both the Bay Area and Los Angeles. A very powerful earthquake on the southern San Andreas could easily be damaging for San Diego also. But science has discovered so many fault lines under the LA metro area that it has to be one of the highest risk areas on the West Coast. Seismologists didn't even know the previously-undiscovered fault line that cause the Northridge even existed until it hit. I've read that Seattle is considered one of the most earthquake prone cities in the nation.
San Diego does, however, have the Rose Canyon fault. When I moved to SD in the late 80's it was thought to be a dormant fault. Then them who know changed their minds about it. Given that it's assumed to be an extension of the Northridge fault, I expect it could cause quite a bit of damage. That, added to the fact that it runs directly underneath downtown SD!
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Old 07-03-2010, 07:38 PM
 
Location: San Diego, California Republic
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Originally Posted by oddstray View Post
San Diego does, however, have the Rose Canyon fault. When I moved to SD in the late 80's it was thought to be a dormant fault. Then them who know changed their minds about it. Given that it's assumed to be an extension of the Northridge fault, I expect it could cause quite a bit of damage. That, added to the fact that it runs directly underneath downtown SD!
It's actually part of the Newport-Inglewood fault system.
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Old 07-04-2010, 08:40 AM
 
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is anyone else really interested in this earthquake stuff? I've never really cared until all these recent ones we've had. I think it's good for people to research area faults so everyone knows what's going on.
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Old 07-04-2010, 11:13 AM
 
Location: San Diego, California Republic
16,588 posts, read 27,423,981 times
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Quote:
Originally Posted by caliguy19 View Post
is anyone else really interested in this earthquake stuff? I've never really cared until all these recent ones we've had. I think it's good for people to research area faults so everyone knows what's going on.
Having grown up in the Bay Area, earthquakes were sort of a way of life lol. I'm also interested in almost anything scientific. I think it's good to research these things also.
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Old 07-04-2010, 12:59 PM
 
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I don't remember feeling the Northridge Quake because I was only 3 lol.

Go to this link and go down to the links in the gray box and you can hear 911 calls from the quake. Very interesting
Aftershocks Continue To Rattle Region - San Diego News Story - KGTV San Diego
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