M4.5 Earthquake near east central Pacific Ocean — March 23, 2023
2023-03-23 21:10:37 UTC (2023-03-23) · approx. 1:10 PM UTC-8 local
On March 23, 2023 at 21:10 UTC, a magnitude 4.5 shallow crustal earthquake struck near east central Pacific Ocean, at a depth of 10.0 km and coordinates 4.3567°, -118.6472°. This earthquake was detected by 40 seismic stations with good location accuracy and was assigned a USGS significance rating of 312, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-118.6472°E
Technical Information
Common Questions
How strong was the magnitude 4.5 earthquake near east central Pacific Ocean?
The magnitude 4.5 earthquake that struck near east central Pacific Ocean on March 23, 2023 at 21:10 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 4.3567°, -118.6472°, which is near east central Pacific Ocean.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us6000k0d6). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, March 23, 2023). M4.5 Earthquake near east central Pacific Ocean — March 23, 2023. Retrieved May 26, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000k0d6/