Nouméa, July 13 — A magnitude 5 earthquake struck southeast of the Loyalty Islands on July 13, 2026, at 06:45 UTC, according to the U.S. Geological Survey. The quake occurred at a depth of 10 kilometers. No tsunami warning was issued.
The depth of 10 kilometers is significant. Shallow earthquakes — those less than 70 kilometers deep — typically produce stronger shaking at the surface than deeper events of the same magnitude.
The practical upshot is that a magnitude 5 at this depth can feel more violent near the epicenter than a deeper quake of the same size. Earthquakes in the magnitude 5 range are classified as moderate. They are capable of causing minor to moderate damage in areas close to the epicenter, particularly to structures not built to seismic standards.
A Seismically Active Region
The Loyalty Islands region is no stranger to seismic activity. The USGS data shows that at least 500 earthquakes of magnitude 5.0 or greater have been recorded within about 300 kilometers of this location over the past two decades. The strongest earthquake in the region during that period was a magnitude 7.7 event in 2023.
Seismologists note that aftershocks are common following an earthquake of this size. These smaller tremors may continue for days or even weeks after the main event.
People in the affected area are generally advised to be prepared for further shaking. The USGS detected the event through its real-time global seismic monitoring network. The absence of a tsunami warning is a key detail.
A magnitude 5 event, while capable of producing local shaking, does not typically displace enough seafloor to generate a dangerous wave. For residents and travelers in the Loyalty Islands region, the immediate practical advice is straightforward: secure heavy objects indoors, know safe spots away from windows, and stay informed through local authorities and the USGS for any aftershock updates.
