NOUMÉA, New Caledonia, July 13 — A magnitude 6.7 earthquake struck southeast of the Loyalty Islands on Monday at 14:45 UTC, according to the U.S. Geological Survey.
The quake occurred at a depth of 10 kilometers. At that depth, it is classified as a shallow earthquake. Seismologists note that shallow events—those less than 70 kilometers deep—typically produce stronger shaking at the surface than deeper earthquakes of the same magnitude.
No tsunami warning was issued following the event.
The Loyalty Islands region sits within a seismically active corridor of the southwestern Pacific. The record shows that at least 500 earthquakes of magnitude 5.0 or greater have been recorded within about 300 kilometers of this area over the past two decades.
The strongest earthquake in that historical record was a magnitude 7.7 event in 2023.
Earthquakes in the magnitude 6 range are strong. They are capable of causing significant damage in populated areas close to the epicenter. The USGS detected this event through its real-time global seismic monitoring network.
On the timeline, seismologists advise that aftershocks are common following an earthquake of this size. The record shows that aftershocks may continue for days or weeks. People in the affected area are generally advised to be prepared for further shaking.
The exact location of the epicenter is southeast of the Loyalty Islands, a chain that lies east of New Caledonia’s main island, Grande Terre. The region is part of the broader Australia-Pacific plate boundary, a zone of frequent seismic activity.
The depth of 10 kilometers places this event in the shallow crust. Shallow earthquakes of this magnitude can produce strong ground acceleration, particularly in areas with softer soils or sedimentary basins.
The USGS maintains a global seismic network that provides real-time data on earthquake location and magnitude. The agency’s initial assessment placed this event at magnitude 6.7, a figure that may be refined as more data becomes available.
No immediate reports of damage or casualties were available at the time of this report. The area southeast of the Loyalty Islands is relatively sparsely populated, though some smaller communities exist on the islands themselves.
The 2023 magnitude 7.7 earthquake in the same general region caused some damage but no widespread casualties, according to previous USGS reports. That event generated a small tsunami that was observed at tide gauges but did not cause significant coastal flooding.
For now, the primary concern for residents and authorities in the region is the potential for aftershocks. The seismic history of the area suggests that the sequence of smaller earthquakes following a magnitude 6.7 event can last for several weeks.
The USGS continues to monitor the region for any further seismic activity. The agency’s real-time network remains operational and will provide updates as the situation develops.
