New Zealand’s National Emergency Management Agency (NEMA) has downgraded a tsunami warning to an advisory following a 5.9-magnitude earthquake that struck 40 kilometres north of Te Anau. While the immediate threat of a major tsunami has passed, officials warn that coastal areas from Milford Sound to Puysegur Point may still face strong, unpredictable surges and unusual currents.
Earthquake Impact and Official Response
The seismic event, initially reported by emergency officials as a 6.3-magnitude quake, was later verified by GeoNet as a 5.9-magnitude tremor. Despite the downgrade in magnitude and the cancellation of the primary tsunami alert, NEMA’s advisory remains in place. The agency has directed residents and visitors to stay out of the water, avoid beaches, and keep clear of harbours, marinas, and river mouths.
GeoNet reported that “strong” shaking was felt throughout the region. For those in the Fiordland area, the experience was intense. Maylene Puyat, duty manager at the Fiordland Hotel in Te Anau, described the shaking as lasting for a full minute. “In the hotel, it’s shaking, but nothing moved,” Puyat told Reuters. Other local reports provided to the Otago Daily Times characterized the event as “long and loud,” with one resident noting the sound resembled a passing train and confirming that the walls were visibly moving.
Did you know? Te Anau serves as the primary gateway to Fiordland, a region defined by its glacier-carved landscape.
Seismic Trends and Public Safety Protocols
The current guidance for the South Island’s west coast underscores a shift toward prioritizing “unusual currents” over large-scale inundation. Even when a tsunami is not expected to cause significant flooding, the water’s behavior can remain hazardous for swimmers, boaters, and those near the shore.
Pro Tips for Earthquake Preparedness
Frequently Asked Questions
What is the difference between a tsunami warning and an advisory?
An advisory, such as the one currently in place for the Fiordland coast, warns of dangerous currents and surges that can threaten people in or near the water.
Why are earthquake magnitudes revised after the event?
Is the Fiordland region prone to earthquakes?
Yes. The South Island’s west coast is situated in a geologically active area. Residents and visitors are encouraged to remain aware of local emergency protocols, as seismic activity is a known feature of the region’s landscape.
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