Two strong earthquakes struck off the coast of the Republic of Vanuatu within an hour on Monday night, according to the European-Mediterranean Seismological Centre.
The European seismological agency reported that the tremors measured magnitudes of 5.0 and 5.2. The first earthquake struck at 10:17 p.m. local time, or 2:17 p.m. Moscow time, followed by the second tremor less than an hour later at 11:13 p.m., or 3:13 p.m. Moscow time.
Both epicentres were located in the Pacific Ocean northwest of the coastal town of Port Olry. The first earthquake struck 221 kilometres from the settlement at a focal depth of 39 kilometres, while the second occurred 206 kilometres northwest at a shallow depth of four kilometres.
Disaster management officials received no initial reports of casualties or damage to buildings and infrastructure following the undersea tremors.
Pacific Ring of Fire
The Republic of Vanuatu is an archipelago nation situated in the southwestern Pacific Ocean, comprising dozens of islands and coral atolls. The country lies directly along the Pacific Ring of Fire, a vast horseshoe-shaped zone of intense volcanic activity and tectonic plate collisions that encircles the Pacific basin.
Seismic tremors are frequent throughout the region because the Australian tectonic plate continuously grinds against and descends beneath the Pacific plate. This subduction process regularly triggers earthquakes, volcanic eruptions, and seabed movements across the islands of Melanesia.
Coastal impact and monitoring
Port Olry is a coastal town located on the northeastern shore of Espiritu Santo, the largest island in Vanuatu. Because both earthquake epicentres were positioned more than 200 kilometres offshore, the distance helped cushion mainland communities from intense shaking. Shallow tremors often generate noticeable vibrations, but offshore locations reduce the hazard.
The European-Mediterranean Seismological Centre, an independent non-governmental scientific organisation that tracks global seismic activity, published data on the two events. Seismologists and regional monitoring networks continue to observe the marine fault zone for any subsequent aftershocks following the tremors.
