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Magnitude 7.1 AMAZONAS, BRAZIL

2003 June 20 06:19:38 UTC

Preliminary Earthquake Report

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

AMAZONAS, BRAZIL

03/06/20 06:19:38 UTC
Epicenter 7.50S 71.62W

BROADBAND SOURCE PARAMETERS
 Energy Magnitude:
  Me                         6.6
 Radiated Energy:
  Es               1.5*10**14 Nm
  No. of sta: 12  Focal mech.  M
 Broadband Depth:       553.0 km
 COMMENT:  Two events about 7 seconds apart. Depth from    
  broadband displacement seismograms based on first event.

Explanation of Parameters
Latest USGS Energy Solutions
Source Parameter Search

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