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Earthquakes

Radar

Iceland: Small earthquake swarm in Katla volcano caldera

At the moment there appears to be a small earthquake swarm in Katla volcano. Currently this is just a earthquake swarm. All the tremor plots are normal and show no signs of harmonic tremors and magma on the move. The largest earthquake in this earthquake swarm in inside Katla volcano caldera was a ML1.3 with the depth of 1.7 km according to reviewed data from Icelandic Met Office.
Image
© Icelandic Met Office
The ML1.3 earthquake as I did record it on my Heklubyggð geophone. Given the shape and how low period this earthquake is. I would say that it was created by magma pushing upwards in the crust inside Katla volcano caldera.
Image
© Creative Commons licence
The ML1.3 earthquake as I did record it on my Heklubyggð geophone. Given the shape and how low period this earthquake is. I would say that it was created by magma pushing upwards in the crust inside Katla volcano caldera.

Bizarro Earth

7,500 Earthquakes Hit Shattered New Zealand City

Christchurch earthquake
© unknown
It's been 10 months since the first big earthquake struck New Zealand's second-largest city. It's been nearly five months since a far more devastating one killed 181 people and crippled the downtown. But it's been just a few hours since yet another aftershock startled Christchurch residents during the night.

"I stop breathing," said Sheridan Cattermole, a bartender and a mom. "I get pins and needles all over. I either freeze or run. I just want things to be back to what they were like this time last year. I had my vege garden, and my sunflowers."

Seismologists have recorded 7,500 earthquakes in Christchurch since September - an average of more than 20 a day. The rumblings are rattling the psyche of the still-battered city. They have left the land under thousands of homes unsafe to build on. Some people have left town entirely. Yet many have proven resilient, and some now see a reconstruction boom on the horizon.

Christchurch is the disaster that the world forgot. When the deadly quake toppled the iconic Cathedral spire and flattened buildings in this city of 390,000, people around the globe paid attention. But two weeks later, the massive earthquake and tsunami that killed more than 20,000 in Japan took center stage.

In New Zealand, the events in Christchurch continue to reverberate.

In a country of 4 million, the cost of the quakes - estimated at more than $12 billion - amounts to eight percent of the country's annual economic output. Compare that to Hurricane Katrina, whose costs were less than 1 percent of U.S. gross domestic product. Christchurch will likely eclipse the Japan disaster in cost per person.

And nobody knows if the worst is over. Not even the experts.

Bizarro Earth

California, US: 3.3 Magnitude Quake Gives Early Wake-Up Jolt

Image
Many people in the Bay Area were jolted awake at 3:51 a.m. this morning, July 16, by a minor earthquake centered in Berkeley.

A 3.3-magnitude earthquake hit the East Bay at 3:51 a.m. today, Saturday. No injuries or damage have been reported.

The U.S. Geological Survey map places the epicenter just west of UC Berkeley's Clark Kerr Campus. The quake had a depth of 4 miles, according to the USGS.

The tremor jolted some folks awake in El Cerrito, Kensington and farther away, in the North Bay, San Francisco, Daly City, Concord, San Ramon, Walnut Creek and several other cities.

Bizarro Earth

US: Alaska Peninsula - Earthquake Magnitude 6.1

Alaska Quake_160711
© USGS
Earthquake Location
Date-Time
Saturday, July 16, 2011 at 19:59:14 UTC

Saturday, July 16, 2011 at 11:59:14 AM at epicenter

Time of Earthquake in other Time Zones

Location
54.895°N, 161.267°W

Depth
48.2 km (30.0 miles)

Region
ALASKA PENINSULA

Distances
70 km (43 miles) SW of Sand Point, Alaska

98 km (60 miles) ESE of Cold Bay, Alaska

971 km (603 miles) SW of Anchorage, Alaska

1674 km (1040 miles) W of WHITEHORSE, Yukon Territory, Canada

Radar

Moderate 5.5 Magnitude Earthquake Briefly Rattles Tokyo, but Causes No Apparent Damage and No Tsunami

Image
© Shizuo Kambayashi/Associated Press
Children from Fukushima release LED balls into the river by Tokyo’s historic landmark Nihonbashi Bridge, seen in the background, in Tokyo Thursday, July 14, 2011, at the opening ceremony of a centenary event of the stone bridge-building. The children participated in the event, praying for the quick recovery of northeastern Japan from the March 11 earthquake and tsunami, at the bridge, which was originally built in 1603, the starting points of Japan’s five main roads that connect Tokyo and other regions including Fukushima.
A moderate earthquake has been felt in Tokyo.

But the minor shaking caused no apparent damage and no tsunami.

The magnitude 5.5 quake hit at 9:01 p.m. Friday. The epicenter was about 70 kilometers (43 miles) north of Tokyo in southern Ibaraki prefecture. It was about 60 kilometers (37 miles) underground.

A magnitude 9.0 earthquake and tsunami on March 11 devastated Japan's northeast coast. Nearly 23,000 people are dead or missing in the disaster that also crippled a nuclear power plant.

Tokyo Electric Power Co. said Friday's quake was felt at the Fukushima Dai-ichi power plant but caused no further damage to it.

Source: The Associated Press

Bizarro Earth

Earthquake Magnitude 6.0 - Offshore Valparaiso, Chile

Chile Qukae_160711
© USGS
Earthquake Location
Date-Time
Saturday, July 16, 2011 at 00:26:13 UTC

Friday, July 15, 2011 at 08:26:13 PM at epicenter

Time of Earthquake in other Time Zones

Location
33.798°S, 72.074°W

Depth
22.9 km (14.2 miles)

Region
OFFSHORE VALPARAISO, CHILE

Distances
47 km (29 miles) WSW of San Antonio, Valparaiso, Chile

94 km (58 miles) SSW of Valparaiso, Valparaiso, Chile

128 km (79 miles) WNW of Rancagua, Libertador O'Higgins, Chile

136 km (84 miles) WSW of SANTIAGO, Region Metropolitana, Chile

Bizarro Earth

US: California Hit By Earthquake Swarm

More than fifty earthquakes have shaken the US State of California in the 14-hour period up to 2:00 p.m. GMT (6:00 a.m. PDT) Friday, according to the United States Geological Survey (USGS).

The quakes occurred throughout the Pacific coastal state, including the Greater Los Angeles area, San Diego and the San Francisco Bay area. The majority of the earthquakes ranged between 2-4 magnitude. Other areas to experience earth tremors include Holtville, Pinnacles, Johnville, Valle Vista, La Jolla, Anderson Springs, Hawthorns, Anza, The Geysers, San Carlos, Hemet and Keene.
Image
© USGS
Earthquake swarms are events where a local area experiences sequences of many earthquakes striking in a relatively short period of time. The length of time used to define the swarm itself varies, but the United States Geological Survey (USGS) points out that an event may be on the order of days, weeks, or months. They are differentiated from earthquakes succeeded by a series of aftershocks by the observation that no single earthquake in the sequence is obviously the main shock. Earthquake swarms also are one of the events typically preceding eruptions of volcanoes.

Bizarro Earth

UK: 3.9 Earthquake Strikes in Middle of Channel

Image
© Ho/AFP/Getty Images
The earthquake struck in the middle of the Channel and was felt by some residents in West Sussex.
West Sussex residents report buildings shaking for few seconds in 3.9 magnitude earthquake

An earthquake with a magnitude of 3.9 has struck in the middle of the Channel. Residents in parts of West Sussex reported buildings shaking for a few seconds at around 8am on Thursday.

The British Geological Survey said the quake had a depth of 10km and its epicentre was south of Portsmouth, Hampshire. Official measurements showed it happened at 7.59am BST.

Sussex police, the Solent coastguard and West Sussex fire and rescue service said they had not been called out to any incidents related to the quake.

David Kerridge, from the British Geological Survey, said the earthquake was the largest in the area since a magnitude 4.5 quake in 1734.

Bizarro Earth

Iceland: Glacier flood confirmed from Vatnajökull glacier, flood is from Hamarinn volcano (Loki-Fögrufjöll area)

The harmonic tremor that started yesterday has been confirmed to be coming from Hamarinn volcano (Bárðarbunga volcano), but they are also known as Loki-Fögrufjöll in GVP database.

So far there is nothing that indicates an eruption is taking place at the moment in Hamarinn volcano. But that might change without warning. At the moment nobody is sure where the glacier flood is coming from. But this appears to be a new area of hydrothermal activity in Hamarinn volcano that is releasing water at the moment. This new hydrothermal area is most likely created by new dike intrusions into the bed rock in the affected area. There are no pictures of the affected area, as the area is impassible to air plains at the moment due to cloud cover or fog. Lack of earthquakes also makes it hard to locate the source of this glacier flood.

Currently the glacier flood has peaked and is getting lower. There not expected to be any damage from this glacier flood on human structures or roads. This area of Iceland is unpopulated. The water is going into large lakes in the area where the effects of this glacier flood are almost none. The glacier flood did flow into a dam lake that is collecting water from rivers that this glacier flood did go into. This did make the lake rise about 70 cm in several hours and fill it. No damage is expected from this glacier flood to the dam or other structures in this area connected to the dam. But it is estimated that 26 gigaliters did flow into the dam lake during the night from this glacier flood.

Bizarro Earth

Costa Rica: 5.3 Earthquake in Upala Alajuela

earthquake damage
© n/a
Today at approximately 2:11pm in the afternoon, Upala was rattled by a 5.3 magnitude earthquake that shook products off store shelves and rattled off home furnishings. No immediate damages were reported however later in the afternoon something strange was discovered as a result.

While reporting on the earthquake in Upala today, a local news station discovered that a district near the epicenter was missing a river. That's right...A RIVER.

Apparently in the moments following the earthquake, a community stood watch as their river disappeared in to the Earth. As of this writing it is still unknown exactly which community this occurred in however once we have the name we will update this article. The affected citizens were interviewed and expressed concern for the loss of this substantial water supply to the area. Not only will this affect humans but also the livestock raised in the area.

Additionally there was also a 4.8 earthquake registered in Guanacaste near Santa Rosa de Bagaces today.