alaska earthquake

Alaskan earthquake shakes Anchorage in aftermath of Redoubt volcanic eruption
Even before the ash plume of the Mt Redoubt volcanic eruption clears, an unrelated 4.7 earthquake shook the Anchorage community on Tuesday afternoon. The epicenter of the Alaska earthquake was located 16 miles north of Anchorage and 9 miles northwest of Eagle River, according to the Alaska Earthquake Information Center.

Preliminary reports indicate no major structural damage and no injuries have been documented. The earthquake happened just a day after a series of earthquakes have occured world-wide, including a powerful quake with a magnitude 7.0 hit in the North Pacific ocean near the Kuril Islands, the deadly L'Aquila in central Italy and a smaller 3.0 tremor in Northern California.

Both the West Coast and Alaska Tsunami Warning Center and the Pacific Tsunami Warning Center in Hawaii have indicated that there is no widespread tsunami threat following the coastal quakes.

While flights to Alaska were interrupted last week as a result of the Redoubt volcanic eruption, full air service has resumed and the earthquake and subsequent aftershocks are not expected to impede travel in the region.

4.7 earthquake not related to Redoubt volcano

The magnitude 4.7 earthquake that struck the Matanuska-Susitna area of Alaska Tuesday is not related to the Redoubt volcano, according to the Alaska Volcano Observatory (AVO).
earthquake picture

The epicenter of the earthquake was near Big Lake, Alaska.

From the AVO website

A M 4.6 earthquake occurred roughly 20 miles north of Anchorage at 12:13 PM today (see the Alaska Earthquake Information Center for more information). The earthquake was not related to the volcanic activity.

Earthquake Details

Magnitude 4.7 (Preliminary magnitude — subject to revision)
Date-Time
* Tuesday, April 07, 2009 at 20:12:54 UTC
* Tuesday, April 07, 2009 at 12:12:54 PM at epicenter
Location 61.475°N, 149.805°W
Depth 26 km (16.2 miles) set by location program
Region SOUTHERN ALASKA
Distances
* 8 km (5 miles) SSE (147°) from Big Lake, AK
* 12 km (8 miles) WSW (242°) from Knik-Fairview, AK
* 13 km (8 miles) NNE (27°) from Point MacKenzie, AK
* 32 km (20 miles) N (356°) from Anchorage, AK
Location Uncertainty Error estimate not available
Parameters NST=013, Nph=013, Dmin=38.2 km, Rmss=0.56 sec, Gp=108°,
M-type=local magnitude (ML), Version=1
Source
* West Coast and Alaska Tsunami Warning Center/NOAA/NWS
Event ID at00913517

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