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Alaska Earthquakes
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BornAgain2



Joined: 12 Dec 2009
Posts: 17197



PostPosted: Fri Apr 26, 2013 12:04 pm    Post subject:  Reply with quote

The USGS has removed links we used to have.  They also post quakes at LESS than they are and no longer use the Richter scale.

April 22, 2013
Magnitude 2.9 - SOUTHERN ALASKA
 2013 April 22 03:50:09 UTC

Magnitude 5.1 - RAT ISLANDS 2013 April 22 04:36:40 UTC
Magnitude 4.6 - RAT ISLANDS 2013 April 22 06:01:41 UTC
Magnitude 4.8 - RAT ISLANDS 2013 April 22 06:03:19 UTC
Magnitude 4.6 - RAT ISLANDS 2013 April 22 06:13:37 UTC

April 26, 2013
Magnitude 5.0 - ANDREANOF ISLANDS, ALEUTIAN IS., ALASKA

2013 April 26 03:15:49 UTC

Magnitude 4.9 - ANDREANOF ISLANDS 2013 April 25 17:06:55 UTC

Magnitude 2.6 - KENAI PENINSULA, ALASKA 2013 April 25 08:09:44 UTC
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BornAgain2



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PostPosted: Fri Aug 30, 2013 11:58 am    Post subject: Reply with quote

7.0 earthquake Alaska
Aug 30, 2013
6.8 magnitude earthquake recorded off the Aleutian Islands, Alaska - @NOAA
Major quake recorded in Alaska Aleutian Islands
A magnitude 7.0 earthquake has rocked Alaska Aleutian Islands with a jet-like rumble that shook homes and sent residents scrambling for cover.
It was followed by multiple aftershocks, including one measuring magnitude 4.5.
The Alaska Earthquake Information Center says the primary earthquake was centered 67 miles southwest of Adak, Alaska, and shaking lasted up to one minute.
The earthquake didn't trigger a tsunami warning.
http://www.sfgate.com/news/us/art...ka-s-Aleutian-Islands-4774984.php

A massive Alaska earthquake
2 earthquakes, one 6.8 magnitude followed by a 7.0 magnitude quake.
http://news.lalate.com/2013/08/30...quake-today-2013-7-0-strikes-atka
http://earthquake.usgs.gov/earthquakes/eventpage/usb000jdt7#summary
http://www.emsc-csem.org/Earthquake/earthquake.php?id=332179
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BornAgain2



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PostPosted: Sat Aug 31, 2013 10:40 am    Post subject: Reply with quote

Alaska hit by powerful quake, aftershocks
Aug 31, 2013
A magnitude 7.0 earthquake was strongly felt in Alaska's Aleutian Islands, the state Earthquake Information Center says, and was followed by aftershocks.
Several aftershocks rattled a remote Aleutian Island region off Alaska in the hours after a major 7.0 temblor struck with a jet-like rumble that shook homes and sent residents scrambling for cover.

At least three dozen aftershocks, including one reaching magnitude 6.1 in strength, struck after the major quake Friday, according to the U.S. Geological Survey.

"I heard it coming," said Kathleen Nevzoroff, who was sitting at her computer in the tiny Aleutians village of Adak when the 7.0 temblor struck at 8:25 a.m. local time, getting stronger and stronger. "I ran to my doors and opened them and my chimes were all ringing."

There were no reports of damage or injuries from the earthquake, which occurred in a seismically active region. It was strongly felt in Atka, an Aleut community of 64 people, and the larger Aleutian town of Adak, where 320 people live.

The earthquake and the aftershocks didn't trigger any tsunami warnings, but Michael Burgy with the West Coast and Alaska Tsunami Warning Center in Palmer, Alaska, said the center is monitoring for potential tsunamis caused by landslides, either on land or under water.

The Alaska Earthquake Information Center said the primary earthquake was centered 67 miles southwest of Adak, about 1,200 miles southwest of Anchorage. Shaking lasted up to one minute.
The 6.1 aftershock struck in the same general area at 10:39 p.m. Friday. Police and town officials in Adak didn't immediately answer telephone calls for comment Friday night.

"We do expect aftershocks to occur in the next few days," USGS geophysicist Jessica Turner said. She said there had been a least 30 so far measuring at least magnitude 2.5.
She said the USGS hasn't had any reports of damage from the quakes, but added that the major one and some larger aftershocks have been felt.

The 7.0 quake occurred offshore in the subduction zone where plates of the Earth's crust grind and dive. By contrast, California's most famous fault line, the [b]San Andreas, is a strike-slip fault. Quakes along strike-slip faults tend to move horizontally[/b].

In Adak, city clerk Debra Sharrah was upstairs in her two-story townhome getting ready for work when she heard a noise.
"I thought it was my dog running up the stairs," she said. "It kept making noise and then it got louder. So then all of a sudden the rumbling started."
The four-plex of townhomes was shaking and swaying as Sharrah and her dog, Pico, dashed out the door. It seemed like the building moved for a long time, but the only thing disturbed in her home was a stepstool that fell over.

"Nothing fell off my walls, and the wine glasses didn't go out of the hutch or anything," said Sharrah, who moved to the island community from Montana's Glacier National Park area almost two years ago.
In Atka, Nevzoroff manages the village store and expected to find goods had flown off the shelves. But nothing was amiss.
"Everything seems to be okay," she said.
The communities are located in a sparsely populated region and both played roles in World War II.

Atka residents were displaced during the war, relocating to Southeast Alaska so the U.S. government could demolish the village to prevent the Japanese from seizing it as they had other Aleutian communities. After the war, the U.S. Navy rebuilt the community and residents returned. Today, the community is a cluster of solidly built utilitarian buildings scattered over rolling hills that turned emerald green in warmer months.

Adak, 110 miles to the west, had been home to U.S. military installations that allowed forces to wage a successful offense against the Japanese after they seized the Aleutian Islands of Kiska and Attu. After the war, Adak was transformed into a Naval air station that served as a submarine surveillance center during the Cold War. Later, the facilities were acquired by the Aleut Corp. — a regional native corporation — in a federal land-transfer agreement. It became a city in 2001 and today retains its military appearance.
http://news.msn.com/us/alaska-hit-by-powerful-quake-aftershocks
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CJ
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Joined: 22 Sep 2009
Posts: 32147



PostPosted: Wed Jan 29, 2014 5:20 pm    Post subject: Reply with quote

Alaska earthquake swarm
Jan 22, 2014
 There is an unusual cluster of earthquakes in several areas of Alaska, Prince William Sound, Cook Inlet, Yukon, Whittier, Kenai pen, etc.
http://www.aeic.alaska.edu/Seis/recenteqs/index.html

Look here later, not posted yet
www.standeyo.com


Alaskan port cut off from road traffic after avalanches
January 28, 2014
– Road traffic to Valdez, Alaska, was cut off from the rest of the state after avalanches over the weekend blocked the only road into the coastal community, officials said on Monday. The highway to the town of about 4,000 residents was blocked after an avalanche in the Keystone Canyon on Friday, followed by another on Saturday, according to the city’s website. The Richardson Highway could be shut for a week or more while crews work to clear the road, officials said. Supplies were being brought by barge to the town, one of Alaska’s main seaports, which lies in a remote area of the Chugach Mountains. Officials have set up shelters and urged some residents to evacuate their homes as a precaution, according to the website. “There is plenty of gasoline and heating fuel oil in town to serve local needs during an extended road closure,” said a statement posted late Sunday. “Should fuel run short at any time, it will be barged in as needed.” Schools remain open in the town, as well as airport and port facilities, officials said. Valdez was recently named by Weather.com as the snowiest city in the nation, with an average annual snowfall of 326 inches. –Yahoo News
http://theextinctionprotocol.word...rom-road-traffic-after-avalanches

I suspect quakes contributed to landslides.
There have been a lot of quakes all over Alaska in the past week.


Last edited by CJ on Mon Jul 27, 2015 9:03 am; edited 1 time in total
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BornAgain2



Joined: 12 Dec 2009
Posts: 17197



PostPosted: Sun Apr 20, 2014 5:44 pm    Post subject: Reply with quote

M 5.6 - 44km NNE of Noatak, Alaska
2014-04-18 11:56:48 UTC-07:00

M 5.5 - 23km ENE of Noatak, Alaska
2014-04-18 11:44:17 UTC-07:00

Remote Alaska quake followed by aftershocks
4/18/14 - A moderate earthquake was recorded Friday morning in Alaska above the Arctic Circle, and was followed by an aftershock almost as powerful.
http://www.adn.com/2014/04/18/343...ote-alaska-quake-followed-by.html
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CJ
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Posts: 32147



PostPosted: Mon Jun 23, 2014 4:45 pm    Post subject: Reply with quote

8.0 earthquake Little Sitkin Island, Alaska
June 23, 2014
The Aleutian arc extends approximately 3,000 km from the Gulf of Alaska in the east to the Kamchatka Peninsula in the west.
http://earthquake.usgs.gov/earthquakes/eventpage/usc000rki5#summary


Tsunami warning issued for Alaska after quake
A tsunami warning has been issued for parts of Alaska's Aleutian Island chain after a powerful earthquake.
http://news.yahoo.com/tsunami-war...ssued-alaska-quake-212645080.html
https://ca.news.yahoo.com/tsunami...alaska-magnitude-7-213144968.html
http://www.foxnews.com/us/2014/06...ake-off-alaska/?intcmp=latestnews

A trio of earthquakes struck in the South Pacific Ocean Tuesday morning southeast of Raoul Island, New Zealand
http://www.cnn.com/2014/06/23/wor...d-earthquake/index.html?hpt=hp_t2

7.2 earthquake quake off Kermadec Islands occurred earlier

Alaska, New Zealand Quakes Might Be Linked
With massive quakes striking off the Alaskan and New Zealand coast Monday, a scientist with the U.S. Geological Survey said he is weighing the possibilities that the two might be connected.
David Oppenheimer of the USGS told KCBS that there are several times a year when large earthquakes across the world occur within minutes of each other.
On Monday, a magnitude 6.9 quake occurred off the coast of New Zealand shortly after noon Pacific Time. A magnitude 7.9 quake struck off the Aleutian Islands struck shortly before 2 p.m. Pacific.
Oppenheimer said it is possible the New Zealand quake triggered the Alaska quake.
“The timing of it is such that we call the surface waves, the waves that travel around the circumference of the earth, arrived about the time the earthquake occurred, Oppenheimer said. The USGS scientist said more study would be needed.
While that remains under investigation, Oppenheimer said the Alaska quake would have happened soon if the New Zealand quake did not occur.
“There is just so much stress relieved within an earthquake of magnitude 7.9,” he said.
http://sanfrancisco.cbslocal.com/...ific-ocean-david-oppenheimer-usgs
Question


Last edited by CJ on Tue Jun 24, 2014 9:40 am; edited 1 time in total
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CJ
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PostPosted: Tue Jun 24, 2014 5:02 am    Post subject: Reply with quote

A magnitude-7.9 earthquake struck near Alaska’s Aleutian Islands, triggering a small tsunami and shaking felt over a wide area, the National Tsunami Warning Center said.
7.5 inch wave was measured at Amchitka Island, in the Aleutian Islands chain.
The earthquake struck at 12:53 pm Alaska Daylight Time on Monday near Little Sitkin Island in the far western part of the Aleutian Island chain, just west of the International Date Line.

The US Geological Survey said the main jolt was followed by a series of aftershocks - 21 in total over a four-hour period. Two significant aftershocks, measuring magnitude 6.0 and 5.8, occurred within 37 minutes of the main shock. A powerful 6.9 aftershock was registered 4 hours after the 7.9 tremor rocked the area.

"When you've got an earthquake that big, it rings the Earth like a bell," Mike West, a seismologist who serves as director of the Alaska Earthquake Center, told Reuters.
http://rt.com/usa/168048-major-earthquake-alaska-aleutian

Its not rare in Kermadic islands - occurs all the time
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CJ
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PostPosted: Thu Jul 17, 2014 8:39 am    Post subject: Reply with quote

6.0 quake Alaska July 17, 2014
SOUTHERN YUKON TERRITORY, CANADA

http://www.emsc-csem.org/Earthquake/earthquake.php?id=391402
http://earthquake.usgs.gov/earthquakes/eventpage/ak11328120#summary

5.8 earthquake hits near Gulf of Alaska in Canada
http://www.reuters.com/article/20...dUSKBN0FM1DJ20140717?feedType=RSS

A strong Alaska earthquake today 2014 has struck west of Whitehorse, Canada. The Alaska earthquake today July 17, 2014 began moments ago.
Officials tell news that a 5.8 magnitude Alaska earthquake today began just after 4:49 am PST. The quake was shallow. Reps tell news that the quake struck at ground level. As a result the quake could be felt across the region. USGS indicates to news that Alaska earthquake was fifty-nine miles west of Kakutat. It was one hundred eighty-six miles west of Whitehorse, Canada. Reps tell news that the quake was west of Juneau, and east of Anchorage.

Several strong quakes have hit the state in recent years. In September 2011, Alaska was struck by a massive 6.8 earthquake. The quake was of marginal depth located roughly twenty miles below the earth’s surface. In May 2012, a 4.6 magnitude Anchorage earthquake struck eight miles southwest of Anchorage. The quake was also sixteen miles northwest of Hope and eighteen miles south of Point MacKenzie. Then in December 2012, a 5.8 magnitude quake hit twenty-three miles southwest of Susitna and thirty-two miles west of Anchorage. The quake began southwest of Wasilla and Palmer and west of Chugach State Park. The quake was also northwest of Kenai and south of highway 3.
http://news.lalate.com/2014/07/17...today-2014-strikes-west-of-canada


Magnitude 5.8 earthquake hits near Gulf of Alaska in Canada
A magnitude 5.8 earthquake struck western Canada near the Gulf of Alaska early on Thursday, the U.S. Geological Survey said.
The quake, initially reported as a magnitude 6.1 event, hit 59 miles (95 km) north-northwest of Yakutat, Alaska just over the U.S.-Canadian border and about 186 miles (300 km) from Whitehorse, Canada, according to USGS.
http://news.yahoo.com/magnitude-5...s-near-gulf-alaska-121215979.html

OK Was this Alaska or Canada???
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BornAgain2



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PostPosted: Fri Jul 25, 2014 3:21 pm    Post subject: Reply with quote

http://local.msn.com/earthquakes-occur-in-3-parts-of-alaska-1
Earthquakes occur in 3 parts of Alaska

Seismologists in Alaska say earthquakes have jolted three different parts of the state.

7/25/14

UNEAU, Alaska — Seismologists in Alaska say earthquakes have jolted three different parts of the state.

Several earthquakes, including a 5.9 magnitude one, occurred around the same location early Friday in southeast Alaska. The U.S. Geological Survey says light shaking was felt around Juneau, about 100 miles to the east.

An unrelated 4.3 magnitude earthquake was felt in Kodiak and no one reported feeling another unrelated 3.7 quake in Alaska's interior.

There are no immediate reports of damage.

Alaska Earthquake Center seismologist Natasha Ruppert says it's somewhat unusual to have unrelated quakes strong enough to be felt in two parts of the state.

The magnitude 5.9 quake in southeast Alaska was immediately preceded by a 5.3 foreshock and followed by a 4.6 aftershock and multiple other aftershocks.

No tsunami is expected.

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