M4.9 Earthquake 50 km WSW of Oukaïmedene, Morocco — September 8, 2023
2023-09-08 22:30:44 UTC (2023-09-08) · approx. 9:30 PM UTC-1 local
Felt by 65 people across nearby locations.
On September 8, 2023 at 22:30 UTC, a magnitude 4.9 shallow crustal earthquake struck 50 km WSW of Oukaïmedene, Morocco, at a depth of 10.0 km and coordinates 31.0364°, -8.3516°. This earthquake was detected by 75 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 411, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 65 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-8.3516°E
Technical Information
Common Questions
How strong was the magnitude 4.9 earthquake near Oukaïmedene, Morocco?
The magnitude 4.9 earthquake that struck 50 km WSW of Oukaïmedene, Morocco on September 8, 2023 at 22:30 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 31.0364°, -8.3516°, which is 50 km WSW of Oukaïmedene, Morocco.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us7000kufg). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, September 8, 2023). M4.9 Earthquake 50 km WSW of Oukaïmedene, Morocco — September 8, 2023. Retrieved November 17, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000kufg/