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Posts Tagged ‘California earthquake’

Significant Earthquake Strikes Offshore California

Posted by feww on October 27, 2017

Heba-453T

M4.3 quake occurs 32km SW of Lompoc, CA –USGS

EQ Details:
Magnitude: 4.3 mw
Location (uncertainty): 34.421°N 120.678°W (±0.5 km)
Depth (uncertainty): 4.3 km (±1.1)
Origin Time: 2017-10-26 20:38:51.340 UTC
Number of Phases: 83
Minimum Distance: 21.8 km (0.20°)
Travel Time Residual: 0.25 s
Azimuthal Gap: 218°
FE Region: OFFSHORE CENTRAL CALIFORNIA (43)

Iceland’s Latest Seismicity

M 4.6 – 119km S of Akureyri, Iceland
Location: 64.609°N 18.002°W
Depth: 10.0 km
Time: 2017-10-27 00:16:43 (UTC)

M 4.6 – 118km SSE of Akureyri, Iceland
Location: 64.643°N 17.559°W
Depth: 10.0 km
Time: 2017-10-26 23:26:35 (UTC)

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Significant Quake Strikes NE of Los Angeles Area

Posted by feww on June 13, 2014

SEISMIC HAZARD
HEIGHTENED GLOBAL SEISMICITY
SCENARIOS 08, 07
.

M3.5 earthquake strikes the foot of Ralston Peak, California

Centered at 34.308°N, 117.499°W the quake occurred at a depth of about 11.5km (7.2mi), according to USGS/EHP.

EQ Details

Magnitude: 3.5Mw
Event Time: 2014-06-13 13:35:20 UTC
Location: 34.308°N 117.499°W depth=11.5km (7.2mi)
Nearby Cities:

  • 13km (8mi) SW of Oak Hills, California
  • 14km (9mi) SSE of Phelan, California
  • 20km (12mi) WNW of Crestline, California
  • 22km (14mi) SW of Hesperia, California

EQ Location Map

Ralston Peak quake 13jun14
Ralston Peak Earthquake Location Map. Source: USGS/EHP

FIRE-EARTH Earthquake Forecasts for California

FIRE-EARTH Science Team has suspended its research on California seismicity, Japan ditto.

Related Links

 

Posted in Earthquake Hazard, Earthquake Information, Earthquake news, earthquake report, Significant Event Imagery, significant events | Tagged: , , , , , | Leave a Comment »

Shallow Quake Rattles Los Angeles Area

Posted by feww on June 2, 2014

SEISMIC HAZARD
HEIGHTENED GLOBAL SEISMICITY
SCENARIO 08
.

UPDATED @ 10:56UTC

M4.2 Strikes near Westwood, Calif.

Centered at 34.100°N, 118.491°W, the event occurred at a depth of about 4.5km, according to revised data posted online by USGS/EHP.

EQ Details [Revised by USGS/EHP]

Magnitude: 4.2Mw
Event Time: 2014-06-02 02:36:43 UTC
Location: 34.100°N 118.491°W depth=4.5km (2.8mi)
Nearby Cities:

  • 7km (4mi) NW of Westwood, California
  • 8km (5mi) N of Santa Monica, California
  • 8km (5mi) WNW of Beverly Hills, California
  • 11km (7mi) W of West Hollywood, California
  • 23km WNW Downtown Los Angeles

EQ Location Map

LA quake 2june2014
Earthquake Location Map. Source: USGS/EHP

Los Angeles Area Quakes

Meantime, USGS/EHP has revised details of an earlier quake that struck Los Angeles area in May as follows.

Magnitude: 3.3Mw
Event Time: 2014-05-08 06:39:24 UTC
Location: 33.957°N 118.188°W depth=13.9km (8.7mi)
Nearby Cities:

  • 0km (0mi) SW of Cudahy, California
  • 2km (1mi) E of South Gate, California
  • 2km (1mi) S of Bell, California
  • 3km (2mi) WSW of Bell Gardens, California
  • 12km SSW Downtown Los Angeles

 Related Links

FIRE-EARTH Earthquake Forecasts for California

Due to the reasons explained previously on this blog, FIRE-EARTH Science Team has suspended its research on California seismicity, Japan ditto.

Posted in Earthquake Hazard, Earthquake news, earthquake report, Global Disaster watch, Significant Event Imagery, significant events | Tagged: , , , , , , , | Leave a Comment »

M4.4 Quake Strikes Near Beverly Hills, California

Posted by feww on March 18, 2014

SEISMIC HAZARD
.

Magnitude 4.4 earthquake rattles Los Angeles area

Centered at 34.135°N, 118.486°W, 10km (6mi) NW of Beverly Hills, California, the quake struck at a depth of 9.9km (6.1mi) on Monday March 17, 2014 at 13:25:36UTC.

The event was followed by a small aftershock measuring 2.6Mw, which occurred three minutes later.

Earthquake Details

Magnitude: 4.4Mw [USGS/EHP]
Event Time: 2014-03-17 at 13:25:36UTC
Location: 34.135°N 118.486°W depth=9.9km (6.1mi)
Nearby Cities:

  • 9km (6mi) NNW of Westwood, California
  • 10km (6mi) NW of Beverly Hills, California
  • 12km (7mi) W of Universal City, California
  • 12km (7mi) N of Santa Monica, California

Earthquake Location Map

LA Quakes 17mar2014
Earthquakes Location Map. Source: USGS/EHP

FIRE-EARTH Earthquake Forecasts for California

Due to the reasons explained previously on this blog, FIRE-EARTH Science Team has suspended its research on California seismicity.

 

 

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M6.9 Quake Strikes West of Eureka, California

Posted by feww on March 10, 2014

SEISMIC HAZARD
.

Strong Earthquake Strikes 81km West Of Eureka, California

Magnitude 6.9 earthquake struck offshore 81km west of Eureka, California (population: 27,000) at 2014-03-10 05:18UTC.

The quake was preceded by at least 3 foreshocks and followed by 10 aftershocks, with the largest  measuring 4.6Mw, as of posting.

Earthquake Location Map

Eureka quake 9-3-14
Approximate location of the Eureka quake, fore- and aftershocks, as of 07:10UTC March 10, 2014.  Source: USGS/EHP

Earthquake Details

Event Time: 2014-03-10 05:18:12 UTC
Location: 40.821°N, 125.128°W depth=7.0km (4.3mi)
Nearby Cities:

  • 77km (48mi) WNW of Ferndale, California
  • 81km (50mi) W of Eureka, California
  • 85km (53mi) WNW of Fortuna, California
  • 87km (54mi) W of McKinleyville, California
  • 398km (247mi) NW of Sacramento, California
  • Source: USGS/EHP

TSUNAMI EVALUATION
NO Tsunami threat to ALASKA/ BRITISH COLUMBIA/ WASHINGTON/ OREGON AND CALIFORNIA

A WIDESPREAD DESTRUCTIVE TSUNAMI THREAT DOES NOT EXIST BASED ON HISTORICAL EARTHQUAKE AND TSUNAMI DATA.

THE U.S. NATIONAL TSUNAMI WARNING CENTER WILL ISSUE INFORMATION REGARDING ANY LOCAL TSUNAMI THREAT TO COASTS NEAR THE EARTHQUAKE EPICENTER.

Other Significant Quake(s)

M5.8 – 37km SW of Santiago Pinotepa Nacional, Mexico
Event Time: 2014-03-10 00:38:15 UTC
Location: 16.080°N,98.267°W; depth=10.0km (6.2mi)
Nearby Cities:

  • 37km (23mi) SW of Santiago Pinotepa Nacional, Mexico
  • 68km (42mi) SSE of Ometepec, Mexico
  • 131km (81mi) WNW of Puerto Escondido, Mexico
  • 140km (87mi) SE of San Marcos, Mexico
  • 381km (237mi) SSE of Mexico City, Mexico

Related Links and Recent U.S. Quakes

Posted in earthquake, Earthquake Hazard, earthquake report, Eureka, Eureka quake | Tagged: , , , , , , | Leave a Comment »

Significant Quake Strikes the Red Sea

Posted by feww on December 24, 2013

M5.3 quake Strikes  195km (121mi) W of Al Qunfidhah, Saudi Arabia

Earthquake Details

Event Time: 2013-12-23 18:44:22 UTC
Location: 19.200°N 39.224°E
Depth: 10.0km (6.2mi)
Nearby Cities:

  • 179km (111mi) ENE of Tokar, Sudan
  • 195km (121mi) W of Al Qunfidhah, Saudi Arabia
  • 199km (124mi) E of Sawakin, Sudan
  • 215km (134mi) ESE of Port Sudan, Sudan

significant quakes 23-24 dec 2013
1 Day, Magnitude 2.5+ earthquakes Worldwide- December 23-24, 2013. There are 28 Earthquakes on the map. Multiple earthquakes striking the same location aren’t visible due to size restriction. Source: USGS/EHP. Map created by FIRE-EARTH blog.

Other Significant Quakes

M4.3 – 51km S of Lone Pine, California
Event Time: 2013-12-23 13:39:26 UTC
Location: 36.141°N 118.065°W depth=2.1km (1.3mi)
Nearby Cities:

  • 51km (32mi) S of Lone Pine, California
  • 67km (42mi) NNW of Ridgecrest, California
  • 86km (53mi) E of Porterville, California
  • 92km (57mi) E of Lindsay, California
  • 367km (228mi) SSE of Carson City, Nevada

M 3.3 – 1km S of Reno, Texas
Event Time: 2013-12-23 13:11:34 UTC
Location: 32.927°N 97.577°W depth=6.5km (4.0mi)
Nearby Cities:

  • 1km (1mi) S of Reno, Texas
  • 4km (2mi) NW of Azle, Texas
  • 281km (175mi) S of Oklahoma City, Oklahoma

M5.2 – North Atlantic Ocean
Event Time: 2013-12-23 16:45:49 UTC
Location: 25.722°N 66.600°W depth=4.3km (2.7mi)
Nearby Cities:

  • 661km (411mi) NE of Cockburn Town, Turks and Caicos Islands
  • 774km (481mi) NNE of Santa Barbara de Samana, Dominican Republic

M5.8 – 186km WSW of Merizo Village, Guam
Event Time: 2013-12-23 09:12:28 UTC
Location: 12.757°N 143.033°E depth=103.2km (64.2mi)

M5.1 – 93km NE of Visokoi Island
Event Time: 2013-12-23 12:05:47 UTC
Location: 56.130°S 26.087°W depth=10.0km (6.2mi)
Nearby Cities: 2632km (1635mi) ESE of Ushuaia, Argentina

Source: USGS/EHP

M5.8  Kanto Toho-oki region, Off East Coast of Honshu, Japan)
Time 09:25 UTC 23 December 2013
Location: 35.7°N, 142.3°E
Depth: 10 km

Approximate Distances to Nearest Cities

  • 120km (76mi) E of Hasaki, Japan
  • 140km (86mi) E of Asahi, Japan
  • 225km (140mi) E of Tokyo, Japan

M5.7  Kanto Toho-oki region, Japan
Time 06:57 UTC 23 December 2013
Location: 35.7°N, 142.2°E
Depth: 10 km

Approximate Distances to Nearest Cities

  • 120km (76mi) E of Hasaki, Japan
  • 140km (86mi) E of Asahi, Japan
  • 225km (140mi) E of Tokyo, Japan

Source: JMA (distances from global maps)

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Significant Quake Strikes near Lost Hills, California

Posted by feww on December 14, 2013

M4.1 strikes 24km NNW of Lost Hills, CA

Centered at 35.811°N, 119.801°W, the quake struck at a depth of 22.2km (13.8mi), reported USGS/EHP.

  • Event Time: 2013-12-13 07:49:57 UTC
  • Epicenter: 35.811°N 119.801°W
  • Depth: 22.2km (13.8mi)
  • Nearby Cities
    • 24km (15mi) NNW of Lost Hills, California
    • 35km (22mi) SE of Avenal, California
    • 39km (24mi) SW of Corcoran, California
    • 49km (30mi) WNW of Wasco, California
    • 341km (212mi) SSE of Sacramento, California

Earthquake Location Map

google logo of the day 2
Earthquake Location Map. Source: USGS/EHP.  Location and Magnitude contributed by: Northern California Seismic System, UC Berkeley and USGS Menlo Park

 

Posted in Significant Event Imagery, significant events | Tagged: , , , , , | Leave a Comment »

Significant Earthquake Strikes Northern Calif

Posted by feww on May 24, 2013

M5.7 quake strikes near Canyondam, California at a depth of about 10 km. The shallow quake was centered at 40.190°N, 121.061°W, USGS/EHP reported.

The quake was followed by at least two dozen aftershocks measuring 2.5 – 3.6 magnitude, as of posting.

The event was felt in downtown Sacramento, some 145 miles south of the epicenter, according to locals.

[Canyondam, a census-designated place (CDP) in Plumas County, California, is located near the dam that forms Lake Almanor.]

Quake Details

  • Event Time: 2013-05-24 03:47 UTC [2013-05-23 20:47 UTC-07:00 at epicenter]
  • Location: 40.190°N 121.061°W
  • Depth: 11.0km (6.8mi)

Nearby Cities

  • 11km (7mi) WNW of Greenville, California
  • 43km (27mi) SW of Susanville
  • 60km (37mi) NE of Magalia
  • 67km (42mi) NE of Paradise
  • 159km (99mi) NW of Carson City, Nevada

Earthquake Map

Norcal 5-7M

-0O0-

 

Posted in Global Disaster watch, global disasters, global disasters 2013, Significant Earthquakes, Significant Event Imagery, significant events, significant geophysical disturbances | Tagged: , , , , | Leave a Comment »

Strong Earthquake Jolts SoCal – July 7

Posted by feww on July 8, 2010

Earthquake Measuring up to 5.8Mw Hits S. California

The quake was preceded by a foreshock and followed by about a dozen aftershocks.

One of the aftershocks struck the LA area, but the details were later removed from the USGS/EHP website. The quake and its aftershocks may have caused some structural damage near the epicenter of the mainshock.

As an expression of protest against Google for censoring with impunity information posted on this Blog, Fire Earth has abandoned its research into California earthquakes.

The following details were released by USGS/EHP.

10-degree Map Centered at 35°N,115°W


Earthquake Location Map. Source: USGS/EHP

Earthquake Details

  • Magnitude: 5.4 [See below for source]
  • Date-Time: Wednesday, July 07, 2010 at 23:53:33 UTC [Wednesday, July 07, 2010 at 04:53:33 PM at epicenter]
  • Location: 33.417°N, 116.483°W
  • Depth: 11.7 km (7.3 miles)
  • Region: SOUTHERN CALIFORNIA
  • Distances:
    • 20 km (15 miles) NNW of Borrego Springs, California
    • 40 km (25 miles) SW of Indio, California
    • 45 km (30 miles) S of Palm Springs, California
    • 730 km (455 miles) SE of SACRAMENTO, California
  • Location Uncertainty: horizontal +/- 0.3 km (0.2 miles); depth +/- 0.6 km (0.4 miles)
  • Source: California Integrated Seismic Net – USGS Caltech CGS UCB UCSD UNR
  • Event ID: ci10736069

Related Links:

Posted in earthquake, earthquake 2010, Earthquake Hazard, Earthquake news, earthquake report | Tagged: , , , , | 2 Comments »

Strong Earthquake Hits SoCal

Posted by feww on June 15, 2010

Earthquake Measuring Up to Magnitude 6.0Mw Strikes Southern California

The quake and its aftershocks may have caused some structural damage near the epicenter.

Fire Earth has abandoned its research into California earthquakes. The following details were released by USGS/EHP.

  • Magnitude: 5.9
  • Date-Time:
    • Tuesday, June 15, 2010 at 04:26:58 UTC
    • Monday, June 14, 2010 at 09:26:58 PM at epicenter
  • Location: 32.698°N, 115.924°W
  • Depth: 6.9 km (4.3 miles)
  • Region: SOUTHERN CALIFORNIA
  • Distances:
    • 8 km (5 miles) SE (124°) from Ocotillo, CA
    • 24 km (15 miles) WSW (244°) from Seeley, CA
    • 26 km (16 miles) ENE (70°) from Jacumba Hot Springs, CA
    • 36 km (22 miles) WSW (254°) from El Centro, CA
    • 104 km (65 miles) E (79°) from Tijuana, Baja California, Mexico
  • Location Uncertainty:  horizontal +/- 0.5 km (0.3 miles); depth +/- 1.4 km (0.9 miles)
  • Parameters: Nph= 62, Dmin=6 km, Rmss=0.32 sec, Gp= 76°, M-type=regional moment magnitude (Mw), Version=z
  • Source:
    • California Integrated Seismic Net:
    • USGS Caltech CGS UCB UCSD UNR
  • Event ID ci14745580

10-degree Map Centered at 35°N,115°W


Earthquake Location Map. Source: USGS/EHP

Related Links:

Posted in 2010 earthquakes, earthquake, earthquake 2010, Earthquake Hazard, earthquake warning Honshu | Tagged: , , , , , | 1 Comment »

M7.3 Quake Hits Baja, Kills One

Posted by feww on April 4, 2010

Serial No  1,535. If any posts are blocked in your country, please drop us a line.

California Seismicity Rising

The San Andreas Fault Zone [and extensions] has never before come so close to a violent major fragmentation.

Powerful earthquake measuring up to 7.3Mw strikes Baja California, Mexico, killing at least one

The quake located at 32.128°N, 115.303°W, about 60 km (38 miles) SSE (165°) from Mexicali, Baja California, Mexico, occurred on Sunday, April 04, 2010 at 03:40:40 PM (time at epicenter), and at a depth of about 10km.

As of 00:26UTC at least a dozen aftershocks have struck the area, the largest of which measured 5.8 and 5.7Mw respectively.  Additional shocks will follow.

Large swarms of minor shocks have been occurring in Guadalupe Victoria over the last month or so.

The earthquake shook building in San Diego, Phoenix, AZ, and Downtown Los Angeles, some 320km (~ 200 miles) northwest of the epicenter. Eye-witnesses described the shaking as “unbelievable” and “surreal” noting that some building towers were swaying for over a minute after the shock spread. The effect may have been due to the shallow depth of the shock, which occurred at an estimated depth of about 10km (+/- 2.5km).

Latest Casualty Report

“One person died when a house in Mexicali collapsed, Alfredo Escobedo, director of emergency services in Baja California state, Mexico, told Reuters. He said others were reported trapped in elevators, retaining walls had collapsed in some places and electricity was out in several parts of the state.” Reuters reported.

The quake also caused a two-story parking garage next to the Mexicali government headquarters to collapse, injuring several others, according to another report.

Local media in Mexicali report that about a dozen people are still trapped in their homes.

Tsunami Information

According to various tsunami centers, NO destructive tsunami was generated as a result of the quake.

Northern California

An earthquake measuring 4.0Mw  Northern California at 3:49 pm Sunday (local time). The epicenter was located about 25 miles north of Santa Rosa, a report said.

Reader’s Comment:

In response to a reader’s comment, a Fire-Earth Moderator likened  California region to a lake covered with a thin layer of ice, which was frequented by too many full-time ice skaters.


Location Map. Source: EMS. Click image to enlarge.

Summary of Earthquake Details (EMSC)

  • Magnitude:  Mw 7.0 Region: BAJA CALIFORNIA, MEXICO
  • Date time:  2010-04-04 at 22:40:47.7 UTC
  • Location: 32.38 N ; 115.04 W
  • Depth: 10 km
  • Distances (USGS)
    • 26 km (16 miles) SW (225°) from Guadalupe Victoria, Baja California, Mexico
    • 60 km (38 miles) SSE (165°) from Mexicali, Baja California, Mexico
    • 62 km (38 miles) SW (233°) from San Luis Río Colorado, Sonora, Mexico
    • 167 km (104 miles) ESE (105°) from Tijuana, Baja California, Mexico
    • 173 km (108 miles) ESE (106°) from Tijuana, Baja California, Mexico

10-degree Map Centered at 30°N,115°W


Earthquake Location Map. Source: USGS/EHP (earlier map with incorrect data)


Earthquake Location Map. Source: USGS/EHP (Later map with correction made). Color code changed by Fire-Earth Moderators from navy to fluorescent blue for improved visibility. Click image to enlarge.

Earthquake Details (USGS) – [Corrected]

  • Magnitude: 7.2
  • Date-Time:
    • Sunday, April 04, 2010 at 22:40:40 UTC
    • Sunday, April 04, 2010 at 03:40:40 PM at epicenter
  • Location: 32.128°N, 115.303°W
  • Depth: 10 km (6.2 miles) (poorly constrained)
  • Region: BAJA CALIFORNIA, MEXICO
  • Distances:
    • 26 km (16 miles) SW (225°) from Guadalupe Victoria, Baja California, Mexico
    • 60 km (38 miles) SSE (165°) from Mexicali, Baja California, Mexico
    • 62 km (38 miles) SW (233°) from San Luis Río Colorado, Sonora, Mexico
    • 167 km (104 miles) ESE (105°) from Tijuana, Baja California, Mexico
  • Location Uncertainty: horizontal +/- 2.4 km (1.5 miles); depth +/- 31.6 km (19.6 miles)
  • Parameters Nph= 13, Dmin=70 km, Rmss=0.28 sec, Gp=259°, M-type=regional moment magnitude (Mw), Version=2
  • Source:   California Integrated Seismic Net –  USGS Caltech CGS UCB UCSD UNR
  • Event ID: ci14607652

Location Map


Source: USGS/EHP. Click image to enlarge.

Seismic Hazard Map


ShakeMap (USGS)


Population Exposure (USGS)


Related Links:

FEWW Links:

  • Earthquakes

Posted in earthquake, Guadalupe, Mexicali quake, Sonora, Tijuana quake | Tagged: , , , , | 1 Comment »

The Great Southern California ShakeOut

Posted by feww on February 21, 2010

Facilitating Corporate War Against Nature

‘Scientific Mandate’ Helps Corporment* Technicians Alienate Scared Audiences from Nature

In the same way “BERT DUCKS and Covers” helped to fan the flames of Cold War, the “Great Southern California Shakeout”  and its  “drop, cover and hold on” one-liner are engineering public alienation from nature on behalf of the Corporment.

The enemy has changed, from the old Cold war Adversary, Soviet Union, to Mother Nature, but the tried and tested mantra has remained the same: “Our lifestyle is not negotiable [sic.]”

The Corporment can’t afford having large numbers of people going around worrying about how to protect nature against their usual business.

*[Corporment = Government ruled by corporate interests]

Ever Heard of ‘Duck and Cover’?

Now, it’s:  “drop, cover and hold on”

And be sure to recite a prayer for the earthquake dead …

The following is a public information notice:

Great Southern California Shakeout results provide new communication strategies

Researchers who devised the largest earthquake preparedness event ever undertaken in the United States say one of the biggest challenges was translating devastation projections from a hypothetical magnitude 7.8 San Andreas Fault temblor into timely, usable information to the more than 5 million California participants in 2008.

Known as the Great Southern California Shakeout, the event was designed by more than 300 experts in fields including earth sciences, engineering, policy, economics and public health, said University of Colorado at Boulder Research Professor Keith Porter, who coordinated estimates of physical damages in the scenario. He said the interests of the scientists — including high-tech research and state-of-the-art projections — did not always coincide with concerns of the general public and emergency preparedness planners looking for timely, simple information on issues.

“One of the biggest challenges of the ShakeOut was to get scientists to speak the language of citizens,” said Porter of CU-Boulder’s civil, environmental and architectural engineering department. “While many researchers were concerned about advancing the state of science through different modeling scenarios and debate, the citizens made it clear to us they needed the big picture.”

Porter gave a presentation on the subject at the 2010 meeting of the American Association for the Advancement of Science held Feb. 18-22 in San Diego. Porter’s talk was part of a session titled “Earthquake Science and Advocacy: Helping Californians Live Along the San Andreas Fault.” The Great Southern California ShakeOut event was led by the U.S. Geological Survey.

Pushing the limits of science, including efforts like the ShakeOut, almost invariably creates a lack of consensus among scientists that can cause confusion in the public sector leading to “ambiguity aversion” — a preference by people to deal with known risks and to avoid dealing with risks where there is significant disagreement about the level of uncertainty, said Porter. “We found these people needed a single, discreet, story, which led us to explore and present what we thought was a single, realistic outcome of the hypothetical earthquake, as opposed to a discussion of possible outcomes.”

The 2008 ShakeOut scenario and a follow-up 2009 ShakeOut exercise involving more than 5 million Californians participating in “drop, cover and hold on” earthquake drills and other family, school and organizational emergency plans were huge successes, causing the USGS and collaborators to make the ShakeOut an annual event, Porter said. “Our hope is the activities undertaken by participants will become second nature,” he said. “In a sense it is similar to people taking CPR courses annually to keep up to speed.”

The USGS team that created the ShakeOut is now creating an emergency preparedness scenario known as ARkStorm to simulate the outcome of a series of massive West Coast storms similar to those that pounded California in 1861 and 1862. Those storms lasted for 45 days, flooded vast areas of northern and southern California, submerged a swath of the Sacramento and San Joaquin valleys 300 miles long and up to 60 miles wide and inundated large areas of Los Angeles and Orange counties.

Such storms draw heat and moisture from the tropical Pacific Ocean, forming “atmospheric rivers” that cause damage on the same scale of earthquakes and are projected to become more intense as a result of climate change, said Porter. Porter is leading the ARkStorm team that is assessing the potential outcome from such a storm in terms of physical damages, repair costs and the restoration time for buildings, dams, levees, harbors, bridges, roads, water supply systems and electric power.

Contact: Keith Porter
Keith.Porter@Colorado.edu
303-492-2732
University of Colorado at Boulder

YOU can be smart like Bert, but you need a shelter on your back, too!

Skeptics could order their own personal earthquake-proof shelter from the nearest branch of [name and address withheld :)]


Brewster Body Armor offers some protection, but is more mobile than the mobile shelter! Source: Flickr


Mobile Shelter. Be sure to duck your head down and under the shelter when the earthquake strikes! Source: Flickr


And there’s protection for your pooch, too … Source: Flickr

Related Links:

Posted in earthquake drill, Sacramento, San Andreas Fault, San Joaquin, U.S. Geological Survey | Tagged: , , , , , , , , , , , , , | Leave a Comment »

Strong Earthquake Strikes Offshore N Calif

Posted by feww on February 5, 2010

Earthquake measuring up to 6.1 Mw strikes offshore  northern California

Strong earthquake measuring up to 6.1Mw struck offshore northern California about 56 km (35 miles) WNW (282°) of Petrolia, CA, Thursday, February 4, 2010 at 20:20 UTC.

The earthquake was felt as far north as  Oregon’s Grant Passs, south to  San Francisco and east to Redding, reports said.

The quake occurred about 27km (17 miles) southwest of the M6.7 January 10 (UTC) quake that shook Ferndale and Humboldt Hill, CA.

Earthquake Location


Click image to enlarge. Source: NEIC/USGS

Tsunami Info

Although the quake struck at a depth of about 11 km, it wasn’t strong enough to create a significant tsunami.

Injury/Damage

Items reportedly fell from walls and shelves but there was no reports of serious damage, or any injuries as of posting.

The January 10 quake (UTC) caused at least $40 million in damage and a serious injury when an elderly woman broke her hip in a fall, Mercury News reported.

Earthquake Details:

  • Magnitude as reported by USGS: 5.9 [Max magnitude estimated by Fire-Earth: 6.1Mw]
  • Date-Time:
    • Thursday, February 04, 2010 at 20:20:21 UTC
    • Thursday, February 04, 2010 at 12:20:21 PM at epicenter
  • Location: 40.431°N, 124.929°W
  • Depth: 11.2 km (7.0 miles)
  • Region: OFFSHORE NORTHERN CALIFORNIA
  • Distances:
    • 56 km (35 miles) WNW (282°) from Petrolia, CA
    • 59 km (36 miles) WSW (254°) from Ferndale, CA
    • 68 km (42 miles) WSW (256°) from Fortuna, CA
    • 76 km (47 miles) WSW (239°) from Eureka, CA
    • 363 km (225 miles) NW (306°) from Sacramento, CA
  • Location Uncertainty: horizontal +/- 1.4 km (0.9 miles); depth +/- 2 km (1.2 miles)
  • Source:
    • California Integrated Seismic Net:
    • USGS Caltech CGS UCB UCSD UNR
  • Event ID: nc71348851

Shakemap

Earthquake Shakemap. Source: CISN/USGS

Seismic hazard Map

Click image to enlarge
.

USGS Quaternary Fault and Fold Database for the United States: Eureka 1° x 2° Sheet


Click image to enlarge.


Cascadia Subduction Zone


Cascadia Subduction Zone. Source: USGS

Quake Animations

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Posted in calif seismicity, earthquake, Eureka quake, petrolia quake, seismic event report | Tagged: , , , , , , | Leave a Comment »

Strong Quake Strikes Offshore N California

Posted by feww on January 10, 2010

Magnitude 6.5 [Possibly 6.7Mw] Strikes Offshore Northern California

Strong earthquake measuring up to 6.7Mw struck offshore northern California Sunday, January 10, 2010 at 00:27:39 UTC.

The quake was located at 40.674°N, 124.655°W about 35 km (22 miles) WNW (288°) from Ferndale,  and 39 km (24 miles) W (261°) from Humboldt Hill, CA, and occurred at a depth of 16.4 km (10.2 miles), USGS reported.

The Mainshock which occurred to the east of Cascadia Subduction Zone, was followed by at least 4 aftershocks, as of posting, the largest of which measured 3.8 to 4.1Mw.

Tsunami Information


According to NOAA’s West Coast and Alaska Tsunami Center website there was no Tsunami Watch, Warning, or advisory in effect. Click image to enlarge.

Closeup View closeview Event Location earthview Alert Status wwareas


10-degree Map Centered at 40°N,125°W


Earthquake Location map. Source: USGS/EHP. Enhanced by FEWW.
(Click Images to enlarge). All images are sourced from USGS/EHP

USGS Quaternary Fault and Fold Database for the United States: Eureka 1° x 2° Sheet

Earthquake Details

  • Magnitude: 6.5 [FEWW Estimate: Mainshock may have measured up to 6.7Mw]
  • Date-Time:
    • Sunday, January 10, 2010 at 00:27:38 UTC
    • Saturday, January 09, 2010 at 04:27:38 PM at epicenter
  • Location: 40.645°N, 124.763°W
  • Depth: 21.7 km (13.5 miles)
  • Region: OFFSHORE NORTHERN CALIFORNIA
  • Distances:
    • 43 km (27 miles) W (280°) from Ferndale, CA
    • 48 km (30 miles) W (259°) from Humboldt Hill, CA
    • 51 km (32 miles) WSW (255°) from Bayview, CA
    • 53 km (33 miles) WSW (252°) from Eureka, CA
    • 365 km (227 miles) NW (310°) from Sacramento, CA
  • Location Uncertainty:  horizontal +/- 0.7 km (0.4 miles); depth +/- 1.6 km (1.0 miles)
  • Parameters Nph= 56, Dmin=41 km, Rmss=0.24 sec, Gp=220°,
  • M-type=regional moment magnitude (Mw), Version=8
  • Source: California Integrated Seismic Net:   USGS; Caltech; CGS; UCB; UCSD; UNR
  • Event ID: nc71338066

Earthquake Location.


USGS Topographic Map, Resolution: 16.0 meters/pixel

Seismic Hazard Map


Estimated Population Exposed to Earthquake Shaking. Click images to enlarge.

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Posted in Bayview, Calif quake 2010, earthquake forecast, Eureka, Ferndale quake | Tagged: , , , , , , , | 4 Comments »

More Aftershocks Strike Gulf of Calif, NZ

Posted by feww on August 5, 2009

Another strong aftershock Strikes Gulf of California

A strong aftershock measuring 5.5Mw struck the Gulf of California on Wednesday, August 5, at 09:13:13 UTC, USGS reported.

The latest aftershock was the third one reported by USGS, which had earlier upgraded a previous aftershock, the largest to date, to a magnitude 6.2 [from 5.9 Mw.]

A powerful mainshock measuring 6.9 shook the Gulf of California on Monday.

10-degree Map Centered at 30°N,115°W

245_30
Earthquake Location Map. USGS

Location: 29.615°N, 113.850°W
Depth: 10km
Event ID: us2009jwbr

A powerful aftershock strikes off west coast of the South Island, NZ

Meanwhile, a much stronger aftershock measuring 6.1Mw struck off west coast of the South Island, New Zealand.

Location: 45.472°S, 166.336°E
Depth: 10km
Event ID: us2009jyaw

Click on the link for details of the mainshock:
Powerful 7.8 M Quake Strikes New Zealand Region

Related Links

Posted in Kermadec trench, Mt Ruapehu Eruption Alert, Plate Tectonics, Seismic Hazard | Tagged: , , , , | Leave a Comment »

California Earthquake Forecast 2009

Posted by feww on March 24, 2009

Magnitude 7.4 earthquake could strike California in 2009

FEWW Forecasts a magnitude 7.4 earthquake and two strong aftershocks (5.5+ Mw) striking California in 2009 with a probability of 0.8. The occurrence uncertainty is about 90 days from the estimated time. The epicenter is located in a built-up area.

Moderators are currently discussing the merits of disclosing further details of the event too early ahead of the forecast seismicity.

Related Links:

Posted in Earthquake probability, earthquake rupture, GEOSTATISTICS, Seismic Hazard, tectonic stress | Tagged: , , , , | 42 Comments »