Posts Tagged ‘san andreas’
Thursday, October 20th, 2011
[Or rather, make that a 4.0 on the Richter, final answer. That was for the afternoon earthquake. This evening's aftershock at 8:16 PM was a 3.8.]
People in the West Bay could definitely feel this this one today, the one centered beneath UC Berkeley.
It felt like a succession of sharp bumps for a few seconds and then there was some generalized shaking – perhaps it all lasted about six seconds.
The Did You Feel It Map:
The initial estimate was a 4.2:
| Magnitude |
4.2 |
| Date-Time |
- Thursday, October 20, 2011 at 21:41:04 UTC
- Thursday, October 20, 2011 at 02:41:04 PM at epicenter
|
| Location |
37.864°N, 122.249°W |
| Depth |
9.8 km (6.1 miles) |
| Region |
SAN FRANCISCO BAY AREA, CALIFORNIA |
| Distances |
- 2 km (2 miles) ESE (112°) from Berkeley, CA
- 5 km (3 miles) NE (47°) from Emeryville, CA
- 5 km (3 miles) NNW (341°) from Piedmont, CA
- 8 km (5 miles) NNW (346°) from Oakland, CA
|
| Location Uncertainty |
horizontal +/- 0.2 km (0.1 miles); depth +/- 0.4 km (0.2 miles) |
| Parameters |
Nph= 90, Dmin=2 km, Rmss=0.18 sec, Gp= 22°,
M-type=local magnitude (ML), Version=3 |
| Source |
|
| Event ID |
nc71667366 |
Tags: 20, 2011, 20th, 241, 242, 3.8, 3.9, 4, 4.0, 4.2, afternoon, aftershock, Aftershocks, bay area, Berkeley, california, campus, clark kerr, colleg, did you feel it, dorm, earthquake, east, east bay, EPICENTER, epicentre, fault, feel, felt, filed, hayward, magnitude, map, Oakland, october, p-m, quake, residence, richter, richtor, san andreas, San Francisco, scale, softball, thursday, uc berkeley, university of california, usgs
Posted in events | 6 Comments »
Friday, July 15th, 2011
NASA just posted a photo from the last Space Shuttle flight. It’s big, like 4000 pixels.
Here are some annotations. (The white line is the mighty San Andreas fault.)
Click to expand.“This image featuring the San Francisco Bay area was recorded with a still camera using a 180-mm lens by one of the Expedition 26 crew members aboard the International Space Station, flying 220 miles above Earth.”
And here’s the plain version at 1800 pixels:
Surf’s up.
Tags: 2011, airport, bay area, beach, beaches, bolinas, california, City, county, devil's slide, fault, from, GGNRA, half moon bay, image, lagoon, marin, mavericks, nasa, ocean, ocean beach, pacific, pacifica, palomarin, parks, photo, Photograph, pic, point reyes, pt. reyes, rodeo, rodeo beach, san andreas, San Andreas fault, San Francisco, San Mateo, Sea, seal rocks, SFO, shuttle, space, Stintson, surf, surfers, surfing, tennessee valley, tunnel
Posted in parks, sports | No Comments »
Thursday, January 7th, 2010
It felt like a quick initial jolt followed up by three seconds of shaking to those of us in San Francisco. See what people thought about the latest rumblings of our San Andreas Fault over at SFist.com.
The updated report from the USGS indicates a 4.2 near the city of Milpitas.
Right here, “A” marks the spot:
A light earthquake occurred at 10:09:35 AM (PST) on Thursday, January 7, 2010.
The magnitude 4.2 event occurred 10 km (6 miles) ENE of Milpitas, CA.
The hypocentral depth is 9 km ( 6 miles).
| Magnitude |
4.2 – local magnitude (ML) |
| Time |
Thursday, January 7, 2010 at 10:09:35 AM (PST)
Thursday, January 7, 2010 at 18:09:35 (UTC) |
| Distance from |
Milpitas, CA – 10 km (6 miles) ENE (62 degrees)
Alum Rock, CA – 12 km (8 miles) NNE (12 degrees)
Sunol, CA – 16 km (10 miles) SSE (150 degrees)
San Jose City Hall, CA – 17 km (11 miles) NNE (29 degrees)
|
| Coordinates |
37 deg. 28.6 min. N (37.477N), 121 deg. 47.8 min. W (121.797W) |
| Depth |
9 km (5.6 miles) |
| Location Quality |
Excellent |
| Location Quality Parameters |
Nst= 89, Nph= 89, Dmin=3 km, Rmss=0.08 sec, Erho=0.1 km, Erzz=0.4 km, Gp=36 degrees |
| Event ID# |
nc71336726 |
| Additional Information |
map with fault names
Google Earth KML (Requires Google Earth.)
ShakeMap shaking intensity maps
NCSS First Motion Mechanism 1 |
As per usual, t’was the Northern Calaveras (it means “skulls”) branch of the San Andreas. Alum Rock, will you ever win?
Tags: (BART), 10:09, 10:10, 2010, 4.1, 4.2 magnitude, 7th, Alameda, alum rock, am, bay area, Bay Area Rapid Transit, branch, calaveras, california, Contra Costa, county, earthquake, Earthquake Hazards Program, january, light, magnitude, marin, milpitas, moderate, morning, Muni, resevoir, richter, richtor, san andreas, san francsico, san jose, San Mateo, Santa Clara, scale, sunol, TRACKS, transit, tunnel, U.S. Geological Survey, usgs
Posted in Uncategorized | 8 Comments »
Saturday, June 6th, 2009
We certainly could sense it in San Francisco, anyway, but it definitely was smaller than what occurred on March 30, 2009. No reports of injuries or damage so far. See the deets below. It felt very small in San Francisco. It felt “short and sharp” to those a mile away from the epicenter in the East Bay. At least one “weenie Texan” transplant “thought it was a five.” And Commenter Jane says “It felt like a big truck drove up the street in Point Richmond.”
Those in the State Building in San Francisco’s Civic Center probably didn’t feel a thing. Mayor Gavin Newsom would probably like to remind you about upgrading your “soft story” structure. And good thing City Attorney Dennis Herrera is Suing for Seismic Safety Upgrades at the Mirant Power Plant, right?
Gaia is stirring…
An earthquake occurred at 3:30:56 PM (PDT) on Saturday, June 6, 2009.
The magnitude ? (not yet determined) event occurred 1 km (1 miles) NE of El Cerrito, CA.
The hypocentral depth is 6 km ( 4 miles).
| Magnitude |
3.2 |
| Time |
Saturday, June 6, 2009 at 3:30:56 PM (PDT)
Saturday, June 6, 2009 at 22:30:56 (UTC) |
| Distance from |
El Cerrito, CA – 1 km (1 miles) NE (37 degrees)
Kensington, CA – 2 km (2 miles) NNW (330 degrees)
East Richmond Heights, CA – 3 km (2 miles) SE (139 degrees)
Berkeley, CA – 6 km (4 miles) NNW (345 degrees)
Oakland, CA – 16 km (10 miles) NNW (339 degrees)
|
| Coordinates |
37 deg. 55.5 min. N (37.925N), 122 deg. 17.6 min. W (122.293W) |
| Depth |
6.1 km (3.8 miles) |
| Location Quality |
Excellent |
| Location Quality Parameters |
Nst= 25, Nph= 25, Dmin=4 km, Rmss=0.1 sec, Erho=0.2 km, Erzz=0.5 km, Gp=39.6 degrees |
| Event ID# |
nc40237749 |
| Additional Information |
map with fault names
Google Earth KML (Requires Google Earth.)
Waveforms |
Tags: 2009, 32, 330, 3:31, 6, 6-6, 6th, afternoon, aftershock, ashbury, bay area, Berkeley, california, city attorney, dennis herrera, earth, earthquake, east, el cerrito, el sobrante, estimate, fault, gavin newsom, haight, june, june 6, june 6th, june sixth, kensingtin, magnitude, Mayor, now, Oakland, PM, point, quake, recent, richmond, richmond heights, richter, ricmond heights, san andreas, San Francisco, scale, seismograph, sixth, south bay, tembler, upper
Posted in environment | 3 Comments »
Monday, March 30th, 2009
That didn’t feel so bad in the 415. A little scary at first, for a second or two. After that you could tell it wasn’t going to be a big deal…
| Magnitude |
4.3 |
| Date-Time |
- Monday, March 30, 2009 at 17:40:29 UTC
- Monday, March 30, 2009 at 10:40:29 AM at epicenter
|
| Location |
37.285°N, 121.620°W |
| Depth |
6.2 km (3.9 miles) |
| Region |
NORTHERN CALIFORNIA |
| Distances |
- 18 km (11 miles) N (7°) from Morgan Hill, CA
- 19 km (12 miles) E (91°) from Seven Trees, CA
- 20 km (13 miles) ESE (117°) from Alum Rock, CA
- 25 km (16 miles) ESE (104°) from San Jose City Hall, CA
|
| Location Uncertainty |
horizontal +/- 0.1 km (0.1 miles); depth +/- 0.3 km (0.2 miles) |
| Parameters |
NST=250, Nph=250, Dmin=7 km, Rmss=0.08 sec, Gp= 58°,
M-type=duration magnitude (Md), Version=1 |
| Source |
|
| Event ID |
nc40234037 |
Tags: 4.4, 43, aftershock, ashbury, bay area, california, Caliveras, earthquake, fault, haight, hayward, morgan hill, richter, san andreas, San Francisco, san jose, scale, south bay, tembler, upper
Posted in disaster drill | 4 Comments »
