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GEOLOGICAL HAZARDS 		Natural Hazards Home
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National Geophysical Data Center
The Natural Hazards Data Resources Directory has been made available online by NOAA's National Geophysical Data Center with funding from the Institute for Business and Home Safety.
Institute for Business and Home Safety

The following organization provides Worldwide Earthquake Data.


International Seismological Center

    Raymond J. Willeman, Director
    International Seismological Centre
    Pipers Lane
    Thatcham, Berkshire
    United Kingdom RG19 4NS
    Telephone: [44] (0) 1635 861022
    Fax: 44 (0) 1635 872351
    Email: seismo@isc.ac.uk
    Website: http://www.isc.ac.uk/

The International Seismological Centre is a non-governmental organisation charged with the final collection, analysis and publication of standard earthquake information from all over the world. Earthquake readings are received from almost 3,000 seismograph stations representing every part of the globe. The Centre's main task is to redetermine earthquake locations making use of all available information, and to search for new earthquakes, previously unidentified by individual agencies.

The ISC currently produces two publications, the Bulletin of the ISC and the Regional Catalogue of Earthquakes. It also holds a stock of the former publications Bibliography of Seismology 1965-1995, and Felt and Damaging Earthquakes 1976-1990. The ISC can also provide technical searches.

The bi-monthly Bulletin of the ISC contains all relevant information for each earthquake, including

  • origin estimates by other agencies
  • a refined estimate by the ISC, with time, location and standard error
  • additional source information such as moment tensor solutions
  • for large earthquakes, associated phase arrival reports

The semiannual Regional Catalogue of Earthquakes is relevant to detailed studies of seismicity and the one most sought by institutions such as consulting engineering firms and insurance companies. It contains

  • lists of mb > 5.5 shallow and intermediate focus and mb > 5.0 deep focus earthquakes
  • reports of felt and damaging earthquakes
  • probable explosions
  • events grouped by geographic regions.

Earthquakes that have comments indicating that they were felt or caused damage are extracted and listed separately in Felt and Damaging Earthquakes (publication now ceased).

The complete Bulletin and Catalogue are available on a series of compact disks.

The Bibliography of Seismology appeared twice a year, giving full reference to seismological publications.

The Centre's Historical Earthquake File is a continually growing file. It contains earthquake locations from 1904, although only major earthquakes are present for earlier years.

The Centre also has a collection of seismological bulletins, travel time tables, and maps.

Pricing information is available from the Sales Page. On-line data searches are available for hypocentral data and bibliographic information.

For information concerning the Natural Hazards listed here, please contact the individual organizations directly.

For comments about this website, please contact:

Ruth Brocko