M4.3 Earthquake 15 km SSW of Skikda, Algeria — December 28, 2021
2021-12-28 19:25:15 UTC (2021-12-28) · approx. 7:25 PM UTC+0 local
On December 28, 2021 at 19:25 UTC, a magnitude 4.3 shallow crustal earthquake struck 15 km SSW of Skikda, Algeria, at a depth of 11.6 km and coordinates 36.7381°, 6.8615°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — 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 1 citizen response 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
6.8615°E
Technical Information
Common Questions
How strong was the magnitude 4.3 earthquake near Skikda, Algeria?
The magnitude 4.3 earthquake that struck 15 km SSW of Skikda, Algeria on December 28, 2021 at 19:25 UTC had a depth of 11.6 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000g9yv). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, December 28, 2021). M4.3 Earthquake 15 km SSW of Skikda, Algeria — December 28, 2021. Retrieved April 28, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000g9yv/