[IGSMAIL-4141]: Advisory: Co-seismic displacement of FAIR

Geoff Blewitt gblewitt at unr.edu
Mon Nov 4 09:41:43 PST 2002


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IGS Electronic Mail      04 Nov 09:41:41 PST 2002      Message Number 4141
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Author: Geoff Blewitt
Subject: FAIR


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IGSCB Electronic Mail      04 Nov 08:17:44 PST 2002      Message Number 8485
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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
  ________________________________
  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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