Volume 48, Issue 1 - 6 of the Summary covers data analysis on the first six months of data year 2011 including: Summary of Seismicity, Statistics of Collected Data, Overview of the ISC Bulletin, Leading Data Contributors.

Submitted articles:

• The Canterbury, New Zealand Earthquake Sequence II: The MW 6.2 Christchurch Earthquake of 21 February 2011 and Continuing Aftershock Sequence
• An overview of the Mw 9, 11 March 2011, Tohoku earthquake

Cite full issue as: International Seismological Centre (2015), Summary of the Bulletin of the International Seismological Centre, January - June 2011, 48(1-6), https://doi.org/10.5281/zenodo.998595.