The plot below shows the total number of earthquakes recorded per week (UTC) over the past two years 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 rate.
Weekly Earthquake Distribution
Select a week period to plot (weeks run Thursday to Thursday):
Use the map below to explore your selected 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. Faults from the USGS recent fault database are shown as grey lines.
Weekly Earthquake Replay
Use the map below to replay your selected week's earthquake activity in southern California. Events are shown in 4-hour intervals, and are color- and size-scaled by the magnitude (blue is smallest, red is largest). Faults from the USGS recent fault database are shown as grey lines. N.B. loading a week with a high number of events may take some time to complete.
@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