M5.9 Earthquake south of the Kermadec Islands — April 18, 2026
2026-04-18 10:47:54 UTC (1 day ago)
Maximum shaking intensity MMI 5.9 (strong). Aftershock of the M6.0 mainshock.
On April 18, 2026 at 10:47 UTC, a magnitude 5.9 shallow crustal earthquake struck south of the Kermadec Islands, at a depth of 10.0 km and coordinates -32.0876°, -178.0627°. The USGS PAGER system issued a green alert level for this event, indicating no significant casualties or damage expected. This earthquake was detected by 48 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 536, placing it among routine seismic activity.
This earthquake is part of an ongoing aftershock sequence following the magnitude 6.0 mainshock that occurred 3 days ago south of the Kermadec Islands. Since the mainshock, the USGS has recorded 11 aftershocks in this area. Aftershock activity is expected to continue for weeks to months as stresses on surrounding faults redistribute.
Earthquake Details
-178.0627°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 5.9 earthquake south of the Kermadec Islands?
The magnitude 5.9 earthquake that struck south of the Kermadec Islands on April 18, 2026 at 10:47 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 -32.0876°, -178.0627°, which is south of the Kermadec Islands.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.9 earthquakes can continue for days to weeks and gradually diminish over time.
Is this the same earthquake as the M6.0 one earlier?
No. This magnitude 5.9 earthquake is an aftershock of the larger magnitude 6.0 mainshock that occurred earlier south of the Kermadec Islands. 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.