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Enhanced Geothermal Systems
Earthquake Catalog Search Help

Select earthquake parameters

The earthquake catalogs may be filtered using several different parameters including time, location (latitude and longitude), magnitude, and depth. Additional criteria are available.

Select output mechanism

By default, the output from the search will be returned to your browser in another document. Most browsers have the capability of directing a document directly to a local disk file instead of displaying it on the screen.

If you think that the search may generate more data than your brower can safely display, you should either set your browser to download documents directly to disk, so that the results of the search will be placed on your computer's disk, or you should specify that the output should be sent to an anonymous ftp file at the NCEDC.

If you send the output to anonymous ftp, you will be informed of the pathname and URL for the file so that you can retrieve it at your convenience. Please delete the file from the NCEDC when you are finished with it. The file will be automatically deleted in within several days if you do not delete it.

Line Limit
It is very easy to generate a lot of unwanted output by inadventently mis-typing any of the search parameters. For example, entering a minimum magnitude of 0.5 instead of 5.0 can signicantly alter the number of matches from a catalog search, and can easily generate megabytes of output from a phase retrieval request.

In order to protect yourself (and the NCEDC) from runaway searches, you should limit the number of lines that the search will generate before it is aborted. If you set this limit to a reasonable value on your desired request, it can help to prevent runaway searches that can result from mis-typed values.

You can disable the output line limit by deleting the value in the line limit field, or by entering a value of 0. Please use this setting with extreme caution.