M4.6 Earthquake 191 km NNW of Santa Cruz da Graciosa, Portugal — November 14, 2021
2021-11-14 23:50:14 UTC (2021-11-14) · approx. 9:50 PM UTC-2 local
On November 14, 2021 at 23:50 UTC, a magnitude 4.6 shallow crustal earthquake struck 191 km NNW of Santa Cruz da Graciosa, Portugal, at a depth of 10.0 km and coordinates 40.5959°, -29.0854°.
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
-29.0854°E
Technical Information
Common Questions
How strong was the magnitude 4.6 earthquake near Santa Cruz da Graciosa, Portugal?
The magnitude 4.6 earthquake that struck 191 km NNW of Santa Cruz da Graciosa, Portugal on November 14, 2021 at 23:50 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 40.5959°, -29.0854°, which is 191 km NNW of Santa Cruz da Graciosa, 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: us7000fv80). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, November 14, 2021). M4.6 Earthquake 191 km NNW of Santa Cruz da Graciosa, Portugal — November 14, 2021. Retrieved January 22, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000fv80/