GPS Velocities for Northridge

Coastlines Black lines are state borders and coastlines. Faultlines Red lines, if present, are geologic (Jennings map) faultlines. Water Blue lines are water. Roads Gray lines are roads. Earthquakes Yellow, blue, and red squares are earthquakes during the last week, day, and hour. Blue stations indicate positions that have been updated within the last three days since 2009/10/28. Yellow stations indicate positions that have not been updated for between 4 and 7 days since 2009/10/28. Orange stations indicate positions that have not been updated for between 8 and 14 days since 2009/10/28. Red stations indicate positions that have not been updated for more than 14 days since 2009/10/28. The earthquakes shown are for one week prior to the last earthquake update. Last earthquake update: Thu Oct 29 4:00:02 UTC 2009 To convert UTC to local time see this list or this table. Real-time Earthquake Maps

Files used in creating velocity map: North America fixed ITRF2000 velocity file ITRF2000 velocity file Google Earth network map Google Earth M 1+ earthquakes, past seven days (colored by age) Northridge.ps Northridge.gmt

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.

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.