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Two Powerful Quakes Strike Fox Islands, Alaska

Posted by feww on October 14, 2009

Two powerful Earthquakes Measuring 6.5 and 6.6 Mw Strike Fox Islands, Aleutian Islands, Alaska

The first earthquake a magnitude 6.5 quake struck on Tuesday, October 13, 2009 at 05:37:21 UTC at a depth of 18 km, followed by a swarm of smaller aftershocks and a second powerful shock measuring 6.6Mw, which struck some 15 hours later.

An earlier quake, also measuring M 6.6, struck the same region about 250km WNW of the recent cluster on October 2, 2009.
Two Powerful Quakes Strike Fox Islands, Alaska

FEWW Moderators have forecast a large earthquake for Kenai Peninsula, Southern Alaska. See links below

Based on the pattern in which the recent quakes are occurring, the Moderators believe a prolonged period of powerful seismic activity in the region may have begun.

This Earthquake:

10-degree Map Centered at 55°N,170°W

2009 October 13 20 -21- 54 UTC
Earthquake Location Map.
Source: USGS/EHP. Enhanced by FEWW

  • Magnitude: 6.6  [maximum quake magnitude estimated by FEWW]
  • Date-Time:
    • Tuesday, October 13, 2009 at 20:21:54 UTC
    • Tuesday, October 13, 2009 at 12:21:54 PM at epicenter
  • Location: 52.634°N, 167.149°W
  • Depth: 13.7 km (8.5 miles) (poorly constrained)
  • Region: FOX ISLANDS, ALEUTIAN ISLANDS, ALASKA
  • Distances:
    • 120 km (75 miles) ESE (106°) from Nikolski, AK
    • 146 km (90 miles) SSW (197°) from Unalaska, AK
    • 190 km (118 miles) SSW (209°) from Akutan, AK
    • 1413 km (878 miles) SW (236°) from Anchorage, AK
  • Location Uncertainty: horizontal +/- 8 km (5.0 miles); depth +/- 27.6 km (17.1 miles)
  • Source: USGS NEIC (WDCS-D)
  • Event ID: us2009mscj

Related Links:

3 Responses to “Two Powerful Quakes Strike Fox Islands, Alaska”

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