Magnitude 7.2 SOUTH ISLAND OF NEW ZEALAND

2003 August 21 12:12:50 UTC

Preliminary Earthquake Report

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

USGS Energy and Broadband Solution

SOUTH ISLAND OF NEW ZEALAND

03/08/21 12:12:50 UTC
Epicenter 45.18S 167.12E

BROADBAND SOURCE PARAMETERS
 Energy Magnitude:
  Me                         6.9
 Radiated Energy:
  Es               5.3*10**14 Nm
  No. of sta:  8  Focal mech.  F
 Broadband Depth:        28.0 km
 Broadband Fault Plane Solution:
 NP1:Strike=220 Dip=72 Slip=  90
 NP2:        40     18        90
 Principal Axes:
  T              Plg=63  Azm=130
  P                  27      310
 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

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U.S. Department of the Interior \| U.S. Geological Survey URL: http://neic.usgs.gov/neis/eq_depot/2003/eq_030821_12/neic_xtat_e.html Contact: NEIC Web Team Last modification: Thursday, 2003 August 21 07:09:29 MDT