M4.8 Earthquake south of Africa — July 23, 2023
2023-07-23 06:09:55 UTC (2023-07-23) · approx. 8:09 AM UTC+2 local
On July 23, 2023 at 06:09 UTC, a magnitude 4.8 shallow crustal earthquake struck south of Africa, at a depth of 10.0 km and coordinates -52.4944°, 27.8912°. This earthquake was detected by 31 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 354, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.8 releases seismic energy equivalent to roughly 239 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.2 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
27.8912°E
Technical Information
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Common Questions
How strong was the magnitude 4.8 earthquake south of Africa?
The magnitude 4.8 earthquake that struck south of Africa on July 23, 2023 at 06:09 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 -52.4944°, 27.8912°, which is south of Africa.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.8 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000khrb). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, July 23, 2023). M4.8 Earthquake south of Africa — July 23, 2023. Retrieved September 30, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000khrb/