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Magnitude 6.6 UNIMAK ISLAND REGION, ALASKA

2003 February 19 03:32:36 UTC

Preliminary Earthquake Report

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

UNIMAK ISLAND REGION, ALASKA

03/02/19 03:32:37 UTC
Epicenter 53.55N 164.55W

BROADBAND SOURCE PARAMETERS
 Energy Magnitude:
  Me                         6.4
 Radiated Energy:
  Es               8.3*10**13 Nm
  No. of sta: 20  Focal mech.  F
 Broadband Depth:        19.0 km
 Broadband Fault Plane Solution:
 NP1:Strike= 45 Dip=70 Slip=  90
 NP2:       225     20        90
 Principal Axes:
  T              Plg=65  Azm=315
  P                  25      135
 COMMENT:  Depth from synthetics
  of broadband displacement seismograms.                  

Explanation of Parameters
Latest USGS Energy Solutions
Source Parameter Search

For more information, contact George Choy, choy@usgs.gov