M4.6 Earthquake 57 km WNW of Mosteiros, Portugal — December 30, 2020
2020-12-30 04:31:48 UTC (2020-12-30) · approx. 2:31 AM UTC-2 local
On December 30, 2020 at 04:31 UTC, a magnitude 4.6 shallow crustal earthquake struck 57 km WNW of Mosteiros, Portugal, at a depth of 10.0 km and coordinates 38.1431°, -26.3921°.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-26.3921°E
Technical Information
Common Questions
How strong was the magnitude 4.6 earthquake near Mosteiros, Portugal?
The magnitude 4.6 earthquake that struck 57 km WNW of Mosteiros, Portugal on December 30, 2020 at 04:31 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 38.1431°, -26.3921°, which is 57 km WNW of Mosteiros, Portugal.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us6000d6rq). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, December 30, 2020). M4.6 Earthquake 57 km WNW of Mosteiros, Portugal — December 30, 2020. Retrieved March 6, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000d6rq/