Link to USGS home page.
Fact Sheet 2005–3016
  About USGS /  Science Topics /  Maps, Products & Publications /  Education / FAQ

Did You Feel It?

Citizens Contribute to Earthquake Science

thumbnail image of a map of the Los Angeles area

Since the early 1990s, the magnitude and location of an earthquake have been available within minutes on the Internet. Now, as a result of work by the U.S. Geological Survey and with the cooperation of various regional seismic networks, people who experience an earthquake can go online and share information about its effects to help create a map of shaking intensities and damage. Such “Community Internet Intensity Maps” (CIIMs) contribute greatly toward the quick assessment of the scope of an earthquake emergency and provide valuable data for earthquake research.

Version 1.0

Posted July 2005

Part or all of this report is presented here in Portable Document Format. The latest version of Adobe Acrobat Reader® or similar software is required to view it. If you wish to download the latest version of Acrobat Reader® free of charge, click here.

For viewing and printing. logo