GPS Velocities for Helens
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Coastlines |
Black lines are state borders and coastlines.
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Faultlines |
Red lines, if present, are geologic (Jennings map) faultlines.
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Blue lines are water.
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Roads |
Gray lines are roads.
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Yellow, blue, and red squares are earthquakes during the last week, day, and hour.
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Blue stations indicate positions that have been updated within the last three days since 2008/11/13.
Yellow stations indicate positions that have not been updated for between 4 and 7 days since 2008/11/13.
Orange stations indicate positions that have not been updated for between 8 and 14 days since 2008/11/13.
Red stations indicate positions that have not been updated for more than 14 days since 2008/11/13.
The earthquakes shown are for one week prior to the last earthquake update.
Last earthquake update:
Thu Nov 13 23:23:15 UTC 2008
To convert UTC to local time see this list or this table.
Real-time Earthquake Maps |
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Preliminary Global Positioning System results.
Clicking on a station code will take you to a
plot of the north, east and up components
of the station as a function of time.
The station velocities are
in an ITRF2000-NA-fixed reference frame.
The reference frame is described more fully
under the Summary Info button on each station page.
See
gp processing.
for more information about the processing.
Please read disclaimer below.
Disclaimer:
Be advised that these results are preliminary.
The station positions are unchecked
and should not be used for any engineering applications.
There may be errors in the antenna heights.
The velocities are very dependent on the length of the
span of observations.
The presence of outliers (errant observations)
sometimes contaminates the velocities.
Caveat emptor.
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