Shallow M5.7 earthquake hits Balleny Islands region
An earthquake measuring M5.7 struck the Balleny Islands region at 10:30 UTC on April 21, 2026. The event was registered at a shallow depth of 10.0 km (6.2 miles), based on data from USGS.
The coordinates of the earthquake place it in the remote Balleny Islands region, located in the Southern Ocean, between Antarctica and New Zealand. This area is isolated, with no populated centers in the immediate vicinity.
Given the remote, oceanic location of the Balleny Islands region, there are no significant infrastructure elements such as ports, airports, or energy facilities nearby that would be likely to be affected.
There is no tsunami threat associated with this earthquake, based on its location and available data.
The significance index is 500 (on a scale that runs through 1 000), based on magnitude and estimated impact.
The Balleny Islands region is situated along a complex tectonic setting near the Antarctic Plate boundary, an area known for occasional moderate seismic activity due to plate interactions in the Southern Ocean.
This information was last updated at 10:51 UTC on April 21, 2026.
Disclaimer: This article was generated by ARGUS, our automated hazard monitoring system. Learn more.