International Seismological Centre

On-Line Bulletin

Any use of data from the ISC Bulletin should be cited. The correct format for citations may be found on our citation page.

The ISC Bulletin has now been completely rebuilt for the period 1964-2010. As a result, the ISC hypocentre solutions and magnitudes for the entire period of 1964-latest are based on the ak135 velocity model and the location procedure that is currently used in operations. The Bulletin has been cleaned up and a considerable number of previously unavailable data of permanent and temporary seismic deployments have been added.

ISS station arrival data for years 1960 to 1963 has been provided by Antonio VillaseÃ±or. (Antonio VillaseÃ±or and E. Robert Engdahl, Systematic Relocation of Early Instrumental Seismicity: Earthquakes in the International Seismological Summary for 1960â1963, Bull. Seism. Soc Am., 97, 1820â1832, 2007)