M5.1 Earthquake north of Ascension Island — April 16, 2026
2026-04-16 21:46:25 UTC (2 days ago)
Aftershock of the M5.2 mainshock.
On April 16, 2026 at 21:46 UTC, a magnitude 5.1 shallow crustal earthquake struck north of Ascension Island, at a depth of 10.0 km and coordinates 0.2141°, -16.6026°. This earthquake was detected by 28 seismic stations with good location accuracy and was assigned a USGS significance rating of 400, placing it among routine seismic activity.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.2 mainshock that occurred 2 days ago north of Ascension Island. 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
-16.6026°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 5.1 earthquake north of Ascension Island?
The magnitude 5.1 earthquake that struck north of Ascension Island on April 16, 2026 at 21:46 UTC had a depth of 10.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at 0.2141°, -16.6026°, which is north of Ascension Island.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.1 earthquakes can continue for days to weeks and gradually diminish over time.
Is this the same earthquake as the M5.2 one earlier?
No. This magnitude 5.1 earthquake is an aftershock of the larger magnitude 5.2 mainshock that occurred earlier north of Ascension Island. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.