ShakeMaps  USGS Earthquake Hazards Program.  electronic resource 

 - Reston, Va.  U.S. Dept. of the Interior, U.S. Geological Survey  1971- 
<br/><br/> Title from HTML home page last update April 3, 2008(viewed on April 3, 2008). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Earthquakes--Maps.<br/>Earthquakes aftershocks--Maps.
<br/><br/><label>GPO Item No.: </label>0621-J-07(online) 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 19.128/3: