M 2.1 - CHANNEL ISLANDS REG., CALIFORNIA - 2023-04-01 01:48:46 UTC

This seismicity maps have been generated by concatenating the ISC catalogue (since 1964), the EMSC Euro-Med Bulletin catalogue and the EMSC Real Time catalogue. Therefore, they show the seismicity from 1964 until the earthquake occurrence.

Source:

• From 1500 to 1999: T. Utsu ; International Handbook of Earthquake and Engineering Seismology; vol. A; 691-718
• From 2000 to 2007: USGS Quality composite earthquake catalog
• From 2008: National Centers for Environmental Information (NOAA)