Massive Quake Rocks Pacific Island Nation
A 7.1-magnitude earthquake shook Tonga early Monday morning, triggering a tsunami warning for the Pacific island nation. The tremor struck about 100 kilometres northeast of the main island, Tongatapu.
The US Geological Survey (USGS) and Geoscience Australia confirmed the quake’s shallow depth of 10 kilometres, increasing its potential for destruction. Initial readings varied slightly, with some sources listing the magnitude as 7.0.
Figure 1: Geoscience Australia reported that the earthquake occurred northeast of Tonga’s main island. (Source: Geoscience Australia)
Tsunami Alert Raised for Nearby Regions
The Pacific Tsunami Warning Centre (PTWC) quickly issued an alert. Officials warned that hazardous waves could impact coastlines within 300 kilometres of the epicentre.
Tonga and the nearby island nation of Niue could see tsunami waves between 0.3 to 1 metre high. Residents were urged to stay away from coastal areas as authorities assessed the situation.
Meanwhile, Australia’s Joint Tsunami Warning Centre confirmed there was no immediate threat to the Australian mainland.
Uncertainty Over Damage and Casualties
Authorities have yet to report damage or casualties. The quake struck in the early hours, catching many residents off guard. Communications remain limited in some areas, making it difficult to assess the full impact.
Tonga, a remote Polynesian nation, consists of 171 islands and lies over 3,500 kilometres east of Australia. Most of its 100,000 residents live on Tongatapu, the country’s main island.
Tonga’s History of Seismic Activity
Tonga sits on the Pacific Ring of Fire, a region known for frequent earthquakes and volcanic activity. In January 2022, an underwater volcanic eruption near Tonga triggered a devastating tsunami, destroying villages and cutting off communications for weeks.
Monday’s earthquake serves as another reminder of the constant seismic threat in the region.
What Happens Next?
Officials continue to monitor the situation. Emergency teams remain on alert in case of aftershocks or rising sea levels.
Residents have been advised to stay away from coastal areas until the tsunami risk passes. More updates are expected as authorities assess the situation.
