[IGSMAIL-4142]: Advisory: Co-seismic displacement of FAIR

Geoff Blewitt gblewitt at unr.edu
Mon Nov 4 09:40:55 PST 2002


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IGS Electronic Mail      04 Nov 09:43:29 PST 2002      Message Number 4142
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Author: Geoff Blewitt

2002/11/03 22:12 M 7.9 CENTRAL ALASKA Z= 10km 63.74N 147.69W

This is an advisory to warn users of IGS data (including IGS Analysis
Centers) that the IGS station FAIR is expected to have significant
co-seismic displacement due to a magnitude 7.9  earthquake which
occurred at 2002/11/03 22:12:40 UTC, centered approximately 120 km south
of Fairbanks, Alaska.  Post-seismic motion might also be expected.

More information on the earthquake is given below from the USGS.

For purposes of IGS orbit determination, I suggest that data from
FAIR on UTC day 2002/11/03 not be processed from 22:00 to the end of the
day.

I would also recommend not using FAIR for transformations of fiducial-free
solutions into ITRF2000.

This is sent as an early warning for informational purposes only - the
Analysis Coordinator no doubt will recommend a course of action.
 ________________________________
 Geoff Blewitt-Research Professor
 www.nbmg.unr.edu/staff/geoff.htm
 Nevada Bureau of Mines & Geology
     and Seismological Laboratory
       University of Nevada, Reno
           Mail Stop 178
             Reno,  NV 89557-0088
              (775)784-6691  x171
                fax (775)784-1709
                 gblewitt at unr.edu

---------- Forwarded message ----------
Date: Sun, 3 Nov 2002 15:47:24 -0700 (MST)
From: Do_Not_Reply at gldmutt.cr.usgs.gov
To: undisclosed-recipients:  ;
Subject: 2002/11/03 22:12 M 7.9 CENTRAL ALASKA Z= 10km 63.74N 147.69W

2002/11/03 22:12 M 7.9 CENTRAL ALASKA Z= 10km 63.74N 147.69W

        This information is provided by the USGS
         National Earthquake Information Center.
    (Address problems to: sedas at ghtmail.cr.usgs.gov)

These parameters are preliminary and subject to revision.

A magnitude 7.9 earthquake IN CENTRAL ALASKA has occurred at:
63.74N 147.69W  Depth  10km  Sun Nov  3 22:12:40 2002 UTC

Time: Universal Time         (UTC) Sun Nov  3 22:12:40 2002
      Time Near Epicenter          Sun Nov  3 13:12:40 2002
      Eastern Standard Time  (EST) Sun Nov  3 17:12:40 2002
      Central Standard Time  (CST) Sun Nov  3 16:12:40 2002
      Mountain Standard Time (MST) Sun Nov  3 15:12:40 2002
      Pacific Standard Time  (PST) Sun Nov  3 14:12:40 2002
      Alaska Standard Time   (AST) Sun Nov  3 13:12:40 2002
      Hawaii Standard Time   (HST) Sun Nov  3 12:12:40 2002

Location with respect to nearby cities:
     40 miles (65 km) E of Healy, Alaska (pop 1,000)
     45 miles (75 km) ENE of Cantwell, Alaska (pop 200)
     75 miles (120 km) S of Fairbanks, Alaska (pop 30,000)
     580 miles (945 km) NW of JUNEAU, Alaska

Flinn-Engdahl Region Number = 001
For the definition of Flinn-Engdahl regions, see:
http://neic.usgs.gov/neis/epic/fer_explain.html .

For additional information and subsequent updates, including
associated information and maps please consult the following
web page, which will be available shortly:
http://neic.usgs.gov/neis/bulletin/neic_lbbl.html .

For the most significant earthquakes, information may also be
available from the USGS Earthquake Hazards Program home page at
http://earthquake.usgs.gov/ and the USGS home page at
http://www.usgs.gov/ .

You will continue to receive messages like this when
earthquakes occur that have magnitude 5.5 or greater
anywhere in the world OR 4.5 or greater in the contiguous
US, Hawaii, and Alaska (excluding the Aleutian Islands).

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--
U.S. Geological Survey -- Science for a Changing World





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