A 7.0 magnitude earthquake struck near the Vanuatu island chain on April 28.
The earthquake was on or near the boundary between the Pacific and Australia tectonic plates as a result of reverse faulting, according to USGS.
The earthquake happened beneath the island of Melampa, according to USGS.
Melampa is located near the New Hebrides Trench in the southwestern Pacific Ocean and is part of the Vanuatu island chain, according to Encyclopaedia Britannica.
“Disaster authorities in Vanuatu’s Melampa province say over 1,000 people are returning to their villages after this morning’s magnitude 7 earthquake,” according to Radio New Zealand.
Large earthquakes frequently are experienced in the Vanuatu region, according to USGS.
“The Australia plate is in one of the most seismically active areas of the world,” according to USGS.