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ANSS Composite Catalog Search

ANSS Composite Catalog Home | Search | Details | Caveats | Link to ComCat

The ANSS (Advanced National Seismic System) Composite Catalog is a world-wide earthquake catalog created by merging the master earthquake catalogs from contributing ANSS institutions and then removing duplicate solutions for the same event. The ANSS Composite Earthquake Catalog grew out of the efforts of the CNSS (Council of the National Seismic System). It was previously called the CNSS Earthquake Catalog. The ANSS Composite Catalog consists of earthquake hypocenters, orgin times, and magnitudes. Beginning January 1, 2013, ComCat is the catalog of record, superseding the ANSS catalog. ComCat, a newer and different composite catalog, contains earthquake source parameters (e.g. hypocenters, magnitudes, phase picks and amplitudes) and other products (e.g. moment tensor solutions, macroseismic information, tectonic summaries, maps) produced by contributing seismic networks. However, historic regional seismic network catalogs have not yet been fully loaded into the ANSS Comprehensive Catalog.

Use the form below to search the historic global earthquake ANSS Composite Catalog. Help with the form is available.

Acknowledge the NCEDC

Cite the NCEDC:

"NCEDC (2016), Northern California Earthquake Data Center. UC Berkeley Seismological Laboratory. Dataset. doi:10.7932/NCEDC."

Acknowledge the NCEDC:

"Waveform data, metadata, or data products for this study were accessed through the Northern California Earthquake Data Center (NCEDC), doi:10.7932/NCEDC."

Please use these statements in your publication acknowledgments.

Select earthquake catalog - Input dataset and output format

Catalog in readable format
Readable 80-col format
Raw catalog format
Catalog in KML format
Catalog in CSV format

Select earthquake parameters

Event Types: Earthquakes Blasts (Quarry or Nuclear) All Events

Include Events with no reported Magnitude

Additional search parameters may be typed into the box below.

Select output mechanism
If you expect the search to generate a lot of output, you should either set your browser to download to a file, or select the anonymous FTP option.
Send output to my browser.
Send output to an anonymous FTP file on the NCEDC.

Line limit on output:


When you use data from the ANSS Comprehensive Catalog, please provide a proper acknowledgement of the data source.

Questions, Comments, and Feedback

We encourage you to contact us with questions,comments and feedback concerning the ANSS catalog. You can contact us via email at