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California Earthquake History and Catalogs

License/Use Agreement

The California Department of Conservation's (DOC) California Geological Survey (CGS) and the user choose to enter into this License/Use Agreement to utilize digital files of the earthquake catalog of California. The files will be provided by DOC/CGS subject to the following conditions:

  1. Ownership and the distribution rights of the files remain with DOC/CGS. This information was produced by the Department of Conservation, California Geological Survey and is protected by the United States Copyright Law. For information, contact the California Department of Conservation, California Geological Survey.

  2. The user agrees to report any errors found on the files to DOC/CGS.

  3. The user agrees to acknowledge the California Department of Conservation's California Geological Survey in any publication or report that utilizes the data. If the user modifies the catalog in any way, the user agrees to note that the data are modified from the California Department of Conservation's California Geological Survey earthquake catalog.

  4. This information was developed by the DOC/CGS. It is a compilation of data from several seismic networks including: U.S. Geological Survey, California Institute of Technology, University of Nevada-Reno, University of California-Berkeley. For this catalog several different magnitude scales are used. In addition, some events may be missing from the catalog since an algorithm was applied to the catalogs to remove duplicates. Some of the "duplicates" that were removed may have been real events. The uncertainties in locations of earthquakes varies with each of the different networks and with time.

  5. THE EARTHQUAKE CATALOG DATA OF CALIFORNIA ARE PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED WARRANTY INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL DOC/CGS OR ANY OTHER CONTRIBUTOR BE LIABLE TO ANY OTHER PARTY FOR DIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING BUT NOT LIMITED TO TIME, MONEY, OR GOOD WILL, ARISING FROM THE USE, DISTRIBUTION, OPERATION OR MODIFICATION OF THE DATA, EVEN IF DOC/CGS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. IN NO EVENT SHOULD EITHER PARTY BE LIABLE TO THE OTHER FOR INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES OR CLAIMS FROM ANY SOURCE ARISING FROM THIS AGREEMENT.

Earthquake Source Points

License/Use Agreement

The California Department of Conservation's (DOC) California Geological Survey (CGS) and the user choose to enter into this License/Use Agreement to utilize digital files of the earthquake source points of California. The files will be provided by DOC/CGS subject to the following conditions:

  1. Ownership and the distribution rights of the files remain with DOC/CGS. This information was produced all or in part from the digital data of the Department of Conservation, California Geological Survey and is protected by the United States Copyright Law. For information, contact the California Department of Conservation, California Geological Survey.

  2. The user agrees to report any errors found on the files to DOC/CGS.

  3. The user agrees to acknowledge the California Department of Conservation's California Geological Survey in any publication or report that utilizes the data. If the data are modified in any way, the user agrees to note that the data are modified from the California Department of Conservation's California Geological Survey data.

  4. This information was developed by the DOC/CGS. It was digitized recently and has not yet been proofed for accuracy. The earthquake source information was digitized from the California Geological Survey's Fault Activity Map of California and Adjacent Areas by Charles Jennings, published in 1994. The Jennings fault map was compiled and published at a scale of 1:750,000, therefore, 1 km on the ground is represented by about 1.3 mm (less than 1/16 inch) on the map. Source point locations may be uncertain by 1 to 2 km.

  5. THE FAULT POINTS OF CALIFORNIA ARE PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED WARRANTY INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL DOC/CGS OR ANY OTHER CONTRIBUTOR BE LIABLE TO ANY OTHER PARTY FOR DIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING BUT NOT LIMITED TO TIME, MONEY, OR GOOD WILL, ARISING FROM THE USE, DISTRIBUTION, OPERATION OR MODIFICATION OF THE DATA, EVEN IF DOC/CGS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. IN NO EVENT SHOULD EITHER PARTY BE LIABLE TO THE OTHER FOR INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES OR CLAIMS FROM ANY SOURCE ARISING FROM THIS AGREEMENT.