April 7, 2009

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).

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