Seismologists say a cluster of earthquakes has been detected at a remote volcano in Alaska's western Aleutian Islands. The Alaska Volcano Observatory says the quakes began Wednesday evening at Little Sitkin Volcano and are continuing as of Thursday morning. No eruption has been detected.

Scientist in charge John Power says there is no direct link to the swarm of earthquakes at Little Sitkin and a cluster of quakes that shook California's Imperial County this week.

Powers says Little Sitkin is on an uninhabited island and is far from any populated areas. He says the seismic activity is unusual for Little Sitkin, which may have last erupted in the early 1900s.

Powers says the concern about an eruption would be the possible threat posed to aircraft by airborne ash.

Event Time
2012-08-30 13:43:24 UTC
2012-08-30 12:43:24 UTC-01:00 at epicenter
2012-08-30 06:43:24 UTC-07:00 system time

Nearby Cities
93km (58mi) NW of Olonkinbyen, Svalbard and Jan Mayen
709km (441mi) NNE of Akureyri, Iceland
939km (583mi) NNE of Reykjavik, Iceland
942km (585mi) NNE of Kopavogur, Iceland
947km (588mi) NNE of Hafnarfjordur, Iceland

Canada, British Columbia - A 3.0-magnitude earthquake, described as minor by local experts, caused some shaking in Greater Victoria but no recorded damageWednesday afternoon.

Seismologist Garry Rogers from the Pacific Geoscience Centre said the quake hit at 3:20 p.m. and was concentrated about 10 kilometres northwest of Colwood, toward Sooke Lake.

The earthquake came from about 25 kilometres underground.

"It was felt pretty much throughout the area," Rogers said. "We got reports from Sidney to Sooke to all over Greater Victoria." A 3.0-magnitude earthquake, described as minor by local experts, caused some shaking in Greater Victoria but no recorded damage Wednesday afternoon.

Source: The Victoria Times Colonist

Earthquake swarms continued Wednesday in Imperial County as the city of Brawley declared an emergency to deal with the damage. The swarm that began Sunday morning showed signs of slowing down Wednesday, with fewer quakes reported by the U.S. Geological Survey than on recent days. The magnitude of the quakes is also declining.

There was scattered damage around Brawley, but officials have not yet compiled a full estimate of the costs. The Brawley City Council on Tuesday declared a local emergency, according to the Imperial Valley Press.

Hundreds of earthquakes have rattled Imperial County since Sunday morning as an earthquake swarm continued.

But experts say the swarm does not necessarily indicates a larger temblor is on the way.

Certainly, the weekend's quakes were troubling for Imperial County, which is located in one of California's most earthquake prone regions. More than 400 earthquakes have been detected since Saturday evening, according to the U.S. Geological Survey. One local family felt 15 quakes in 21/2 hours.

But for all the ground movement, experts said there is no evidence the earthquake swarms were a precursor to much larger quakes on longer, more dangerous faults. And scientists don't see any immediate signs of added pressure to the San Andreas fault, which is not far from the location of the earthquake swarm.

Wildlife authorities say a strong earthquake in the Pacific Ocean late Sunday destroyed more than 45,000 endangered sea turtle eggs on the coast of El Salvador.

The director of the turtle conservation program for the El Salvador Zoological Foundation says the 7.4-magnitude undersea quake sent at least three waves at least 30 feet high up the beach and destroyed thousands of nests and just-hatched turtles. It also washed up on about 150 people collecting eggs in order to protect them in special pens hundreds of feet up the beach. The waves injured three.

Program director Emilio Leon said that in the last year and a half the foundation has successfully hatched and released 700,000 turtles from four species at risk of extinction.

A "swarm" of earthquakes that touched off Sunday morning in southern California was still rolling along Monday afternoon, registering more than 300 small to moderate quakes that could be felt from Arizona to San Diego. The swarm is unusual but not as rare as you might think.

During an earthquake swarm, an affected area experiences a rapid-fire series of temblors that are all similarly proportioned, so that no one shock emerges as the obvious source of the rest. According to Julie Dutton, a geophysicist with the U.S. Geological Survey, diffuse clusters like these are far less common than earthquakes that arrive as one big shake followed by a series of smaller aftershocks.

Dutton estimates that the USGS records about 30 to 40 notable swarms a year, compared with 20,000 to 30,000 total earthquakes. Because swarms are rooted in the same kind of plate movements and stresses that cause more traditional quakes, she thinks that a large part of the phenomenon's apparent scarcity is based on semantics.

Swarms "are really hard to characterize," she told Life's Little Mysteries. "It's all the same mechanisms. It's just a different way of finding equilibrium in the environment."

Where did the swarm start?

The current swarm originates just outside of the small farming town of Brawley, Calif., about 30 miles (45 km) north of the state's border with Mexico. According to Dutton, swarms with magnitude ranges close to the current one arrive in that area at the rate of one or two per decade, with the most recent one hitting in 2005.

The 2005 swarm, which topped out with a 5.1-magnitude event, was surpassed by yesterday's high of 5.5, the cut-off magnitude at which seismologists expect to start seeing casualties in developed countries, according to USGS geophysicist Paul Caruso. But there have been no reported injuries from the Brawley quakes, and Caruso said Monday morning saw a considerable slowing in the area's seismic activity.

Officials say a strong earthquake has shaken a remote area of eastern Indonesia. The quake was located fairly deep below the northern Molucca Sea and no tsunami warning was issued.

The U.S. Geological Survey says the earthquake measured magnitude 6.4 and struck late Sunday. It says it was centered 138 kilometers (85 miles) west-northwest of the town of Tobelo at a depth of 70 kilometers (43 miles). The area is also south of the southern Philippines.

There were no immediate reports of damage or injuries from the remote area.

Indonesia straddles a series of fault lines that make it prone to volcanic and seismic activity.

A giant quake on Dec. 26, 2004, triggered a tsunami in the Indian Ocean that killed 230,000 people, half of them in Indonesia's Aceh province.

More earthquakes shook Imperial County overnight, part of a swarm of hundreds of temblors that has the region on edge. More damage was uncovered Sunday night, including about 20 mobile homes that suffered damage to their foundations. Photos show merchandise shaken from store shelves, and part of a home's terra-cotta roof collapsed.

A number of families were displaced and hospital patients evacuated as a result of a swarm of hundreds of earthquakes.

No deaths or critical injuries were reported as a result of the quakes, the largest of which measured magnitudes 5.3 and 5.5. There appeared to be fewer quakes overnight Monday compared with Sunday.

Some buildings were damaged by the earlier quakes, including 20 mobile homes that shifted from their foundations, according to the Imperial County Office of Emergency Services. The office was working with the American Red Cross to set up a shelter for displaced families at the Imperial Valley College gymnasium.

The quakes cause scattered power outages, including at Pioneers Memorial Hospital in Brawley, which lost power for about three hours. Assistant hospital administrator Art Mejia said generators immediately kicked in, but officials decided to evacuate patients as a precautionary measure in case the facility had suffered structural damage.

"We decided to err on the side of caution," he said.

Date-Time:
Monday, August 27, 2012 at 04:37:22 UTC

Sunday, August 26, 2012 at 10:37:22 PM at epicenter

Location:
12.279°N, 88.530°W

Depth:
52.9 km (32.9 miles)

Region:
OFF THE COAST OF EL SALVADOR

Distances:
125 km (78 miles) S (184°) from Usulután, Usulután, El Salvador

144 km (90 miles) SSW (195°) from San Miguel, San Miguel, El Salvador

145 km (90 miles) SSW (211°) from La Unión, La Unión, El Salvador

175 km (109 miles) SSE (157°) from SAN SALVADOR, El Salvador