M4.8 Earthquake near central Mid-Atlantic Ridge — October 30, 2021
2021-10-30 17:24:04 UTC (2021-10-30) · approx. 3:24 PM UTC-2 local
On October 30, 2021 at 17:24 UTC, a magnitude 4.8 shallow crustal earthquake struck near central Mid-Atlantic Ridge, at a depth of 10.0 km and coordinates 0.5813°, -25.3819°.
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.
Earthquake Details
-25.3819°E
Technical Information
Common Questions
How strong was the magnitude 4.8 earthquake near central Mid-Atlantic Ridge?
The magnitude 4.8 earthquake that struck near central Mid-Atlantic Ridge on October 30, 2021 at 17:24 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 0.5813°, -25.3819°, which is near central Mid-Atlantic Ridge.
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.
Actions
Authoritative source: USGS event page (event ID: us7000frfh). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, October 30, 2021). M4.8 Earthquake near central Mid-Atlantic Ridge — October 30, 2021. Retrieved January 14, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000frfh/