A powerful 6.7 magnitude earthquake struck off the coast of New Zealand, near the town of Riverton, raising concerns about a possible tsunami, according to local authorities.
Authorities Assessing Tsunami Risk
The Wellington Region Emergency Management agency posted on X (formerly Twitter), stating that they are evaluating whether the earthquake could trigger a tsunami. The agency assured the public that updates would be provided as soon as they have more information.
“We are aware of a 6.7 magnitude earthquake northwest of Snare’s Island at 2:43 AM on March 25, 2025. The National Emergency Management Agency & GNS are currently assessing any tsunami risk to New Zealand,” the agency wrote.
The U.S. National Weather Service’s Tsunami Alert division confirmed that there is no tsunami threat to the U.S. West Coast. However, they indicated that New Zealand’s South Island’s west coast could potentially be affected.
Earthquake Details
The earthquake, which was initially reported as magnitude 7.0, was later confirmed to be magnitude 6.7 by the U.S. Geological Survey (USGS). It struck at a depth of 6.2 miles (10 km) off the southwest tip of New Zealand’s South Island.
New Zealand officials issued a national advisory, stating:
“If a tsunami has been generated, it is unlikely to reach New Zealand for at least one hour.”
New Zealand’s High Seismic Activity
New Zealand lies on the eastern margin of the Australian tectonic plate, one of the most earthquake-prone regions in the world. This is because of the constant movement and collision between the Australian and Pacific plates.
Since 1900, around 15 earthquakes of magnitude 7.5 or higher have occurred near New Zealand. Some of the strongest ones were recorded near the Macquarie Ridge, including an 8.2 magnitude quake in 1989.
The largest earthquake ever recorded on land in New Zealand was the 7.8 magnitude Hawke’s Bay earthquake in 1931, which caused widespread destruction.
Authorities continue to monitor the situation closely and are urging residents in coastal areas to stay alert and follow official updates.
