Special report - updated 25 July 2015

A short update on the Fontana M4.2 event posted Here.

Earthquake activity 31 Jul 2015

Stats are computed at the end of each day UTC (currently 5pm PDT) for the preceding 24 hour period.

  • Number of events: 48
  • Magnitude range: 0.21 - 2.10

Earthquake activity this week

Use the graph and map below to explore this week's earthquake activity in southern California. For further information, links will take you to the USGS page for each event. Events are color-scaled by the time they occurred (blue is early in the period, red is late) and size-scaled by their magnitude. For a version with interactive faults shown, Click Here.

Fast facts:

Live Earthquake Tweets Follow @CaltechQuake

@CaltechQuake tweets automatic earthquake notifications in real-time that have not been reviewed by a seismologist. Messages are only sent for events larger than M2.75. Results are subject to change or deletion.