4.2 earthquake In the SF Bay Area
 

Second one we've had today:(

Our National President is out there and just posted on Facebook that there was a quake. Hope everyone is ok!

There was also a quake earlier in Hawaii. It's amazing all the natural disasters/crazy weather that has occurred in 2011 across the country.

Yeah, it's a little one but 2 in one day is a little freaky.

http://www.sfgate.com/cgi-bin/articl...BAJM1LKI5A.DTL
2nd earthquake - aftershock - rattles Bay Area

Vivian Ho, Chronicle Staff Writer

Thursday, October 20, 2011


Read more: http://www.sfgate.com/cgi-bin/articl...#ixzz1bO0WjWo6

(10-20) 21:01 PDT BERKELEY -- An earthquake measured at magnitude 3.8 struck the Hayward fault near Berkeley at 8:16 p.m. Thursday, the U.S. Geological Survey said.

The agency said it was the aftershock to the 4.0 quake that occurred just hours before in the same area.

The second quake was centered one mile east of Berkeley and was felt throughout the East Bay and San Francisco.

BART delayed service by 15 minutes after the quake.

In Oakland's Montclair District, the evening quake rattled the dinner crowd, particularly at Italian Colors on Mountain Boulevard, where a piece of plaster fell from the ceiling.

"It was three inches by five," said Michael Modos, the manager. "It was pretty dramatic."

Police reported no damage in Berkeley, nor any reports of serious damage in Oakland.

Although U.S. Geological Survey experts have officially determined from the location and depth that the second quake was the aftershock of the first one, geophysicist Rafael Abreu warned people not to get too complacent.

"When you have an area with such an active seismicity, it's hard to tell if you're really seeing if there's an aftershock or if it's just a regular earthquake," he said. "You should be prepared for more earthquakes to happen, whether they're aftershocks or not."

The earlier quake struck the Hayward Fault near Berkeley at 2:41 p.m.

The quake was centered 2 miles southeast of Berkeley, the agency said, and was widely felt in the East Bay and San Francisco.

There were no reports of damage from that quake. BART delayed trains for 15 minutes while workers examined the system. They found no problems.

"My hands are still shaking - my heart is just slowing down," Krys Freeman, a web manager for Greenbiz in Oakland, said minutes after the quake rattled her office on the eighth floor of a building at Frank Ogawa Plaza. "I'm afraid of heights, so I was thinking of exit strategies."

The quake may have felt stronger to many in the East Bay than its 4.0 magnitude would suggest because the epicenter was deep beneath the surface, about 6 miles, said Jack Boatwright, a seismologist for the U.S. Geological Survey.

"The path is very simple from a deeper quake," he said. "That simple path means it is felt very abruptly and very sharply, and that's why people felt it so strongly."

The quake was the same day as an annual Great California ShakeOut state earthquake preparedness exercise.

"You couldn't get any more 'ShakeOut' than this," Abreu laughed "I guess it was lending more credibility to the exercise."

Chronicle staff writers Carolyn Jones, Will Kane, Nanette Asimov and Allen Matthews contributed to this report.


E-mail the wrtiers at cjones@sfchronicle.com, wkane@sfchronicle.com, amatthews@sfchronicle.com, nasimov@sfchronicle.com and vho@sfchronicle.com.



Read more: http://www.sfgate.com/cgi-bin/articl...#ixzz1bO0brcwl

Past 24 hours

http://a7.sphotos.ak.fbcdn.net/hphot...11635821_n.jpg

From the USGS site

Like I said in the other thread, I missed both of them. On the news, they interviewed Berkeley students and said "Everyone we've interviewed said they felt it." I find that odd because everyone I've asked said they didn't. But I guess it's because I wasn't on that side of the Bay today.

One of my friends is in SF and said he missed the first one and barely felt the second.

I'm actually a Berkeley student and was less than a quarter mile away from the epicenter during the first quake and approximately 3/4 mile away for the next one.

Didn't feel the first quake; I riding my bike over bumpy roads, so unless it was literally the big one, the road vibrations drown it out completely.

The second one, I felt: lots of rattling but no damage.

In case you were curious, the epicenter was right in front of the Clark Kerr Campus dorms for the first one. During the second one, it was exactly below the Pi Beta Phi house!

Here's what I heard from a friend in the Bay Area:

"USGS and Google maps say the second big quake today (not counting the two little ones) just happened right under the Chi Psi house on Piedmont ave at Durant...about a block from the stadium that is getting retrofitted...and a block and a half from XO. It was 9 miles deep so felt all over the Bay Area."

I work in the Embarcadero Center and I totally felt the first one but not the second (I was still at the work for the second). Being on the 19th floor is somewhat disconcerting in an earthquake!

I hope these are quakes that are reducing the tension on the Hayward fault. I believe the Hayward fault is the one they think is over due for the big one :(

Close to The Slanted Door restaurant? Love that place! Had a fantastic meal there last month.

I am just South of Market near the Embarcadero on the 15th floor. We really shook yesterday afternoon. I think it may have had more to do with our building being on springs. In other words, the building did what it was suppose to do during an earthquake – give and take. But like you noted, it was quite disconcerting.

For the second quake last night, I was seated in a chair with little roller wheels. My chair "lurched" across the floor maybe a foot. While it wasn’t much, when you add the "sounds" of an earthquake (i.e. house and/or foundation moving, windows rattling, etc.), and knowing about the quake from earlier in the day, I admit I was on edge for a while. And any little creak or sound got my adrenaline pumping a tad.

Two small earthquakes in one day is scary. Yet I can't help but be amused because I am reminded of how people laughed when we east coasters were talking about our 3.0-5.8 earthquake.

http://t0.gstatic.com/images?q=tbn:A..._G7WaPt8KetKrw

This should be updated for the panicky Californians. :)

Darn those panicky Californians who didn't feel anything. :-p

lol!

:o

For what it is worth, I wouldn't say me being “on edge” was anything like or near a panic. Nor was I really scared. If anything, my “edginess” simply meant I was ready for a bigger one to hit. As such, I started making mental notes as to where my earthquake kit was located and I made sure to grab my mobile phone - just in case.

Regardless, it doesn't matter how many earthquakes I have experienced, or even how small they might be. Having the earth shift under me is disconcerting. I find it is similar to when I would “hear” a tornado coming. These sounds and motions are not the norm - even if they are "natural".