This latest issue of the Summary is currently availabe to members of the ISC only in printed form. It will be freely available in electronic form from January 2026. The article however is electronically available now.

Volume 58, Issue II of the Summary covers data analysis on the last six months of data year 2021 including: Summary of Seismicity, Statistics of Collected Data, Overview of the ISC Bulletin, Leading Data Contributors.

Featured article:

• Reported Teleseismic Phase Statistics at the ISC over the last Four Decades

Cite full issue as: International Seismological Centre (2025), Summary of the Bulletin of the International Seismological Centre, July - December 2021, 58(II), https://doi.org/10.31905/O98BYKYC.

Adverts of ISC sponsors included in this issue: