M4.8 Earthquake 21 km WSW of Guelma, Algeria — April 1, 2021
2021-04-01 14:33:33 UTC (2021-04-01) · approx. 2:33 PM UTC+0 local
Felt by 4 people across nearby locations.
On April 1, 2021 at 14:33 UTC, a magnitude 4.8 shallow crustal earthquake struck 21 km WSW of Guelma, Algeria, at a depth of 10.0 km and coordinates 36.4139°, 7.1942°.
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.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 4 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
7.1942°E
Technical Information
Common Questions
How strong was the magnitude 4.8 earthquake near Guelma, Algeria?
The magnitude 4.8 earthquake that struck 21 km WSW of Guelma, Algeria on April 1, 2021 at 14:33 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 36.4139°, 7.1942°, which is 21 km WSW of Guelma, Algeria.
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.
Authoritative source: USGS event page (event ID: us6000dy9p). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, April 1, 2021). M4.8 Earthquake 21 km WSW of Guelma, Algeria — April 1, 2021. Retrieved June 8, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000dy9p/