M4.3 Earthquake 80 km SSE of Olhão, Portugal — January 1, 2022
2022-01-01 21:03:48 UTC (2022-01-01) · approx. 8:03 PM UTC-1 local
Felt by 22 people across nearby locations.
On January 1, 2022 at 21:03 UTC, a magnitude 4.3 shallow crustal earthquake struck 80 km SSE of Olhão, Portugal, at a depth of 6.9 km and coordinates 36.3199°, -7.6651°.
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 22 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
-7.6651°E
Technical Information
Common Questions
How strong was the magnitude 4.3 earthquake near Olhão, Portugal?
The magnitude 4.3 earthquake that struck 80 km SSE of Olhão, Portugal on January 1, 2022 at 21:03 UTC had a depth of 6.9 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 36.3199°, -7.6651°, which is 80 km SSE of Olhão, Portugal.
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.
Authoritative source: USGS event page (event ID: us7000g8da). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, January 1, 2022). M4.3 Earthquake 80 km SSE of Olhão, Portugal — January 1, 2022. Retrieved March 12, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000g8da/