The main purpose of the International Seismological Centre (ISC) is to compile the ISC Bulletin, regarded as the definitive record of the Earth's seismicity. When the production of the paper-based ISC Bulletin became redundant because hypocentres and phases are mostly used digitally, the Summary of the Bulletin of the ISC was created as a replacement to provide regular information about recently released ISC seismicity data. In particular, it analyses and gives an overview of half a year of ISC data and also contains information on the ISC itself, its supporters and data providers, the history, staff and working statutes, as well as important seismological standards and procedures used by the ISC in its operations.

In addition, we include small articles on notable seismic events that occurred during the half-year period, and articles describing the history and operational standards and procedures used at various observatories and networks that contribute their data to the ISC. 

Current Issue

Vol 57 No II (2023): July - December 2020

Volume 57, Issue II of the Summary covers data analysis on the last six months of data year 2020 including: Summary of Seismicity, Statistics of Collected Data, Overview of the ISC Bulletin, Leading Data Contributors.

Submitted article:

  • A Brief History of Broadband Seismometry – Part I

Cite full issue as: International Seismological Centre (2023), Summary of the Bulletin of the International Seismological Centre, July - December 2020, 57(II),


Adverts of ISC sponsors included in this issue:


Published: 2023-12-31
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