Earthquake Information: Strong Mag. 5.7 Earthquake

The German Geological Research Center (GFZ) reported a 5.5-magnitude earthquake in Papua New Guinea near Kandrian in West New Britain province 15 minutes ago. The earthquake occurred on Sunday, August 13, 2023, at 2:09 pm local time at a depth of 10 km. As seismologists review the data and refine their calculations, or as other agencies issue their reports, the exact magnitude, epicenter and depth of the quake could be revised over the next few hours or minutes.
Our monitoring service has identified a second report from RaspberryShake’s citizen-seismograph network, which lists the earthquake at magnitude 5.5.
Based on preliminary seismic data, the earthquake may not have caused significant damage, but a slight tremor in the epicenter area may have been felt by many.
Weak tremors may have been felt at Gondrian (pop. 1000), located 99 km from the epicenter.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up on other significant earthquake news. If you are in the area, send us your experience through our reporting mechanism reality or via Our mobile app. This will help provide additional first-hand updates to anyone around the world who wants to know more about this earthquake.

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Based on its size, the fault that was active during the earthquake ruptured into a surface of approx. 50 km² (=19 square miles) as a first order estimate. Thus the rupture zone may be about 12 km (8 mi) long.
Aftershocks typically occur in the days and weeks following an earthquake on the same fault or near it, approximately at a distance. More than twice the length of the cleavage zone.
A broad linear structure of aftershock epicenters covers the rupture zone of the main shock (see Fig diagram below to check).