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Earthquake Activity


Magnitude 4.6 NEAR ISLANDS, ALEUTIAN ISLANDS
Friday, November 12, 2004 at 16:44:41 UTC

Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver

World Location

Regional Location

Magnitude 4.6
Date-Time Friday, November 12, 2004 at 16:44:41 (UTC) - Coordinated Universal Time
Friday, November 12, 2004 at 06:44:41 AM local time at epicenter
Time of Earthquake in other Time Zones
Location 52.52N 171.06E
Depth 16.4 kilometers
Region NEAR ISLANDS, ALEUTIAN ISLANDS
Reference 150 km (95 miles) WSW of Attu, Alaska
210 km (130 miles) W of Shemya Island, Alaska
2520 km (1570 miles) W of Anchorage, Alaska
3420 km (2120 miles) WNW of JUNEAU, Alaska
Location Quality Error estimate: horizontal +/- 21.6 km; depth +/- 38.7 km
Location Quality
Parameters
Nst=18, Nph=18, Dmin=147.8 km, Rmss=0.82 sec, Erho=21.6 km, Erzz=38.7 km, Gp=188.1 degrees
Source USGS NEIC (WDCS-D)

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NB: The official magnitude for this earthquake is indicated at the top of this page. This was the best available estimate of the earthquake's size, at the time that this page was created. Other magnitudes associated with web pages linked from here are those determined at various times following the earthquake with different types of seismic data. Although, given the data used, they are legitimate estimates of magnitude they are not considered the official magnitude.

The region name is an automatically generated name from the Flinn-Engdahl (F-E) seismic and geographical regionalization scheme. The boundaries of these regions are defined at one-degree intervals and therefore differ from irregular political boundaries. More->

 

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