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Magnitude 6.8 NORTHERN ALGERIA

2003 May 21 18:44:19 UTC

Preliminary Earthquake Report

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

NORTHERN ALGERIA

03/05/21 18:44:19 UTC
Epicenter 36.89N 3.78E

BROADBAND SOURCE PARAMETERS
 Energy Magnitude:
  Me                         6.7
 Radiated Energy:
  Es               2.2*10**14 Nm
  No. of sta: 16  Focal mech.  M
 Broadband Depth:        12.0 km
 COMMENT:  Complex earthquake observed on broadband displacement seismograms, with
  at least one event occurring about 5 seconds after the onset. Depth from synthetics 
  of 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