Quake activity along the San Andreas fault is picking up

There was a lot of slippage all over California this past week.



Here's the 7-day animation for California that dramatically shows it:

http://earthquake.usgs.gov/earthquakes/recenteqsanim/canv/

2 more earthquakes very close to home
the first one off the coast close to Coronado 3.6 at 8:55 pm
and the second one further out the coast 4.3 at 9:00 pm

3.6 Ml - CENTRAL CALIFORNIA
Preliminary Earthquake Report Magnitude 3.6 Ml
Date-Time

* 12 Jun 2010 06:05:13 UTC
* 11 Jun 2010 23:05:13 near epicenter
* 11 Jun 2010 22:05:13 standard time in your timezone

Location 36.864N 121.612W
Depth 8 km
Distances

* 4 km (2 miles) SE (135 degrees) of Aromas, CA
* 7 km (4 miles) WNW (288 degrees) of San Juan Bautista, CA
* 9 km (5 miles) NE (35 degrees) of Prunedale, CA
* 19 km (12 miles) W (276 degrees) of Hollister, CA
* 59 km (36 miles) SSE (155 degrees) of San Jose City Hall, CA
-------------------

Magnitude 4.3 - NEVADA
2010 June 12 15:29:25 UTC

Earthquake Details
Magnitude 4.3
Date-Time

* Saturday, June 12, 2010 at 15:29:25 UTC
* Saturday, June 12, 2010 at 08:29:25 AM at epicenter
* Time of Earthquake in other Time Zones

Location 37.451°N, 117.521°W
Depth 5.2 km (3.2 miles) set by location program
Region NEVADA
Distances

* 19 km (12 miles) ENE (72°) from Sylvania, NV
* 28 km (18 miles) NW (306°) from Tokop, NV
* 37 km (23 miles) SW (216°) from West Spring, NV
* 73 km (46 miles) SSW (200°) from Tonopah, NV
* 248 km (154 miles) NW (305°) from Las Vegas, NV

Earthquake Details
Magnitude 5.0
Date-Time

* Saturday, June 12, 2010 at 15:56:54 UTC
* Saturday, June 12, 2010 at 07:56:54 AM at epicenter
* Time of Earthquake in other Time Zones

Location 54.542°N, 161.469°W
Depth 44.3 km (27.5 miles)
Region ALASKA PENINSULA
Distances

* 80 km (50 miles) SE (137°) from King Cove, AK
* 108 km (67 miles) SW (216°) from Sand Point, AK
* 109 km (68 miles) SE (132°) from Cold Bay, AK
* 1010 km (628 miles) SW (228°) from Anchorage, AK

We felt one just 20 minutes ago - jolted pretty hard too.

We just had a 5.9 earthquake - and it felt as long as an eternity.
Slowly it gets scary....

Wow...I see it on the map a couple of posts up...BIG red square.

Eeowwww. I don't twitter, but I can see twitter on google rolling by, seems it's near the border, something about Ocotillo..

small activity is better than none at all because when there are small events it releases the energy where as if there is a long period of no activity it means there is some build up. it is those events when activity stops when you'll get the largest events. be thankful for lots of smaller quakes because they are not the causers of large scale destruction. So i would much rather go through dozens of 4 or 5 magnitude quakes than a single 7 or 8.

Well, we had a 7.2 on Easter Sunday, and ever since then, we rock on a weekly
basis. Usually a short jolt, but tonight it was quite long and 5.9 or rather 5.7 now
is no small picnic.

---
Yes osso, close to Ocotillo

5.9 Ml - SOUTHERN CALIFORNIA
Preliminary Earthquake Report Magnitude 5.9 Ml
Date-Time

* 15 Jun 2010 04:26:58 UTC
* 14 Jun 2010 21:26:58 near epicenter
* 14 Jun 2010 20:26:58 standard time in your timezone

Location 32.698N 115.923W
Depth 6 km
Distances

* 8 km (5 miles) SE (124 degrees) of Ocotillo, CA
* 24 km (15 miles) WSW (244 degrees) of Seeley, CA
* 36 km (22 miles) WSW (254 degrees) of El Centro, CA
* 104 km (65 miles) E (79 degrees) of Tijuana, Baja California, Mexico

http://www.latimes.com/news/local/la-me-0615-quake-20100615,0,6541830.story

Swarm of quakes rattles region
More than two dozen temblors are recorded Monday night, the largest a magnitude 5.7 that could be felt throughout L.A. County. Experts say they were aftershocks of the 7.2 quake on April 4.

By Tony Perry and Robert J. Lopez, Los Angeles Times

June 15, 2010

Perry reported from San Diego
Advertisement

More than two dozen earthquakes struck Monday night near the U.S-Mexico border in San Diego County, rocking a large swath of Southern California, prompting a momentary shutdown of the San Diego Padres game but causing no apparent major damage, officials said.

The largest of the quakes — a 5.7 magnitude temblor — was recorded at 9:26 p.m, the U.S. Geological Survey said. It could be felt throughout Los Angeles County.

That quake was centered five miles southeast of Ocotillo in San Diego County and 16 miles east-northeast of Jacumba in eastern San Diego County, the survey agency said. The other quakes — ranging from 1.0 to 4.1 magnitude — were also concentrated in the same general area, according to the survey agency.

The earthquakes were all aftershocks of a 7.2-quake that rocked Mexico's Baja California peninsula April 4, according to experts.

"I don't think it's that unusual," Thomas Jordan, director of the Southern California Earthquake Center at USC, said of the series of quakes that rattled that region Monday.

He noted that the northern end of the fault where the Mexican quake struck has been very active in recent months. "It's been especially rich at the north end of the fault," Jordan said.

Unlike the April 4 quake — which killed at least one person and buckled roads in the twin border cities of Mexicali and Calexico — the swarm of quakes Monday night caused no major damage, authorities said.

Kate Hutton, a seismologist at Caltech in Pasadena, said a 5.7 magnitude quake "is big enough to get your attention" but usually will not cause major structural damage because of California's building codes.

The jolt from the 5.7 magnitude temblor was especially strong in San Diego, where officials halted the game between the Padres and the Toronto Blue Jays for several minutes in the 8th inning at Petco Park.

The announcer called for calm, the crowd cheered and the game resumed. Television announcer Dick Enberg joked that the quake may have moved home plate because the Blue Jays were having trouble throwing strikes in the 9th inning.

The Hayward fault in the Bay Area is becoming unusually active with small quakes these past 10 days or so.

Take a lot at the info in these two posts. Geologists are beginning to change their minds about small earthquakes not being related to larger quakes. For instance, the months leading up to the 1989 Loma Prieta quake had an increased number of smaller quakes in the area before the big one. They're noticing the same thing in Cascadia.

http://able2know.org/topic/126216-14#post-3989068

http://able2know.org/topic/126216-14#post-3992358

Magnitude 5.0 - OFF THE COAST OF SOUTHEASTERN ALASKA
2010 June 16 03:33:58 UTC

Earthquake Details
Magnitude 5.0
Date-Time

* Wednesday, June 16, 2010 at 03:33:58 UTC
* Tuesday, June 15, 2010 at 06:33:58 PM at epicenter
* Time of Earthquake in other Time Zones

Location 58.327°N, 139.040°W
Depth 10 km (6.2 miles) set by location program
Region OFF THE COAST OF SOUTHEASTERN ALASKA
Distances

* 141 km (87 miles) SSE (164°) from Yakutat, AK
* 158 km (98 miles) W (276°) from Elfin Cove, AK
* 170 km (106 miles) WNW (285°) from Pelican, AK
* 679 km (422 miles) ESE (113°) from Anchorage, AK

------------------------------------

you know there is a town right on top of the San Andreas fault that has never experienced a quake? They think it has to do with the composition of the type of rock in the area. It is a mixture of some kind of graphite mineral which actually allows the rock to slide more "smoothly" in that area so the fault doesn't jerk creating a vibration of the ground.

Cascadia pops up to say hello:

Magnitude 4.2 - WASHINGTON
2010 June 17 14:23:24 UTC

Earthquake Details
Magnitude 4.2
Date-Time

* Thursday, June 17, 2010 at 14:23:24 UTC
* Thursday, June 17, 2010 at 07:23:24 AM at epicenter
* Time of Earthquake in other Time Zones

Location 46.118°N, 120.745°W
Depth 2.2 km (1.4 miles) set by location program
Region WASHINGTON
Distances

* 31 km (19 miles) S (186°) from White Swan, WA
* 34 km (21 miles) N (10°) from Goldendale, WA
* 35 km (22 miles) SSW (206°) from Harrah, WA
* 154 km (95 miles) ENE (69°) from Vancouver, WA

4.5 Mw - NORTHERN CALIFORNIA
Preliminary Earthquake Report
Magnitude 4.5 Mw
Date-Time

* 24 Jun 2010 02:34:30 UTC
* 23 Jun 2010 19:34:30 near epicenter
* 23 Jun 2010 18:34:30 standard time in your timezone

Location 38.820N 122.671W
Depth 28 km
Distances

* 5 km (3 miles) ESE (111 degrees) of Cobb, CA
* 5 km (3 miles) NNE (20 degrees) of Anderson Springs, CA
* 9 km (6 miles) NNW (328 degrees) of Middletown, CA
* 41 km (26 miles) N (4 degrees) of Santa Rosa, CA
* 108 km (67 miles) WNW (286 degrees) of Sacramento, CA

3.5 Ml - SAN FRANCISCO BAY AREA, CALIF.
Preliminary Earthquake Report
Magnitude 3.5 Ml
Date-Time

* 28 Jun 2010 14:47:04 UTC
* 28 Jun 2010 07:47:04 near epicenter
* 28 Jun 2010 06:47:04 standard time in your timezone

Location 37.742N 122.556W
Depth 8 km
Distances

* 5 km (3 miles) WNW (284 degrees) of San Francisco Zoo
* 10 km (6 miles) NW (306 degrees) of Daly City, CA
* 11 km (7 miles) NW (309 degrees) of Colma, CA
* 13 km (8 miles) WSW (253 degrees) of San Francisco City Hall, CA

3.4 Ml - NORTHERN CALIFORNIA
Preliminary Earthquake Report
Magnitude 3.4 Ml
Date-Time

* 1 Jul 2010 00:29:47 UTC
* 30 Jun 2010 17:29:47 near epicenter
* 30 Jun 2010 16:29:47 standard time in your timezone

Location 39.765N 122.092W
Depth 18 km
Distances

* 7 km (4 miles) WNW (291 degrees) of Hamilton City, CA
* 9 km (6 miles) ENE (77 degrees) of Orland, CA
* 19 km (12 miles) SSE (157 degrees) of Corning, CA
* 22 km (14 miles) W (277 degrees) of Chico, CA
* 145 km (90 miles) NNW (338 degrees) of Sacramento, CA
-----------------------

3.0 Mcd - NORTHERN CALIFORNIA
Preliminary Earthquake Report
Magnitude 3.0 Mcd
Date-Time

* 30 Jun 2010 22:58:34 UTC
* 30 Jun 2010 15:58:34 near epicenter
* 30 Jun 2010 14:58:34 standard time in your timezone

Location 37.447N 121.769W
Depth 6 km
Distances

* 10 km (6 miles) NNE (29 degrees) of Alum Rock, CA
* 11 km (7 miles) E (83 degrees) of Milpitas, CA
* 16 km (10 miles) NE (43 degrees) of San Jose City Hall, CA