Earthquake activity 23 Mar 2017

Statistics are computed at the end of each day UTC (4pm PST, 5pm PDT) for the preceding 24 hour period. For a map of recent earthquakes, visit the SCEDC website.

  • Number of events: 25
  • Magnitude range: 0.42 - 2.33

The plot shows the total number of earthquakes recorded per day (UTC) below different magnitude thresholds. The number varies depending on the detection capabilities of the network and seismic activity levels. Swarms or aftershock sequences can cause spikes in the daily rate.

Earthquake activity this week

Use the graph and map below to explore the earthquake activity during the past seven days in southern California. This is a change to the previous display, we now show a rolling seven day period rather than a fixed Thursday to Thursday week. 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 weekly plots (Thursday to Thursday) with interactive faults shown, Click Here.

Please note that not all earthquake information displayed on this map may have been reviewed by a seismologist, and automated solutions are likely to be updated.

Fast facts:

Recent Earthquake Updates
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.

Acknowledge the SCSN

"California Institute of Technology (Caltech) (1926): Southern California Seismic Network. International Federation of Digital Seismograph Networks. Other/Seismic Network. doi:10.7914/SN/CI"

Data were provided by the Caltech/USGS Southern California Seismic Network

For further acknowledgement info go to Acknowledgment Policy