M4.9 Earthquake near northern Mid-Atlantic Ridge — April 10, 2025
2025-04-10 07:54:08 UTC (2025-04-10) · approx. 4:54 AM UTC-3 local
Aftershock of the M5.4 mainshock.
On April 10, 2025 at 07:54 UTC, a magnitude 4.9 shallow crustal earthquake struck near northern Mid-Atlantic Ridge, at a depth of 10.0 km and coordinates 29.7303°, -42.6089°. This earthquake was detected by 66 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 369, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.4 mainshock that occurred 2 days ago near northern Mid-Atlantic Ridge. Since the mainshock, the USGS has recorded 0 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
-42.6089°E
Technical Information
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Common Questions
How strong was the magnitude 4.9 earthquake near northern Mid-Atlantic Ridge?
The magnitude 4.9 earthquake that struck near northern Mid-Atlantic Ridge on April 10, 2025 at 07:54 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 29.7303°, -42.6089°, which is near northern Mid-Atlantic Ridge.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
Is this the same earthquake as the M5.4 one earlier?
No. This magnitude 4.9 earthquake is an aftershock of the larger magnitude 5.4 mainshock that occurred earlier near northern Mid-Atlantic Ridge. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
Actions
Authoritative source: USGS event page (event ID: us6000q52n). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, April 10, 2025). M4.9 Earthquake near northern Mid-Atlantic Ridge — April 10, 2025. Retrieved June 14, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000q52n/