ISC locations: 1960 to present

What we do Faster search via ISC mirror ISC Membership

The main purpose of the ISC is to compile the ISC Bulletin; regarded as the definitive record of the Earth's seismicity. Data is collected from over 130 agencies worldwide and is available online soon after being received. The Reviewed ISC Bulletin is typically available 24 months behind real-time and is manually checked by ISC analysts. With sufficient data events in the Reviewed ISC Bulletin are relocated using the ISC location algorithm (ISCloc).

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A mirror website and ftp site is available courtesy of IRIS DMC and NSF. Please consider using for faster search results.

Membership of the ISC is open to any scientific academy, governmental agency, research institution or other non-profit organisation. All members are represented on the Governing Council, which determines the general policies of the Centre. Any commercial organisation with an interest in the objectives and/or output of the Centre may become an associate member (sponsor). Please contact us if you are interested in ISC membership.
List of current members and sponsors

Data access Provide data to ISC Projects

The ISC provides full access to data within the ISC Bulletin. Data include hypocentre locations, phase data, amplitude measurements, focal mechanism solutions, etc. Please use one of the search pages.

The ISC also hosts the International Registry of Seismograph Stations (IR), the IASPEI Ground Truth reference events (GT) and theEHB Bulletin.

Use of data from the ISC should always be cited. Please check our citation page for more information.

Data centres and seismological agencies are encouraged to provide their data to the ISC according to the contribution schedule. We collect all earthquake parametric data, including phase readings, hypocentre locations, focal mechanism solutions, etc.

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The ISC is currently involved in the following projects:

  • Rebuild of the ISC Bulletin - recomputing the entire ISC Bulletin using ak135 with the updated ISCloc. The rebuilt bulletin will also include many additional data.
  • CTBTO link to the ISC database - only available to States Parties of the Comprehesive Test Ban Treaty (CTBT), the link is a collection of tools for analysing the datasets maintained at the ISC.
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