Island Watch: Continued Earthquake Activity in PNG

Earthquake activity in the New Britain region of Papua New Guinea has continued since Tuesday morning, New Zealand time.

Tuesday’s magnitude 5.8 and 5.4 quakes have been revised following further study by US Geological Survey seismologists. The event at 9:56 a.m. on November 7th, New Zealand time has been revised upward from magnitude 5.8 to 6.0 whilst the the magnitude 5.4 at 10:16 p.m. has been revised to magnitude 5.3.

Wednesday’s magnitude 6.3 earthquake has been revised upward to magnitude 6.5 but other parameters remain the same.

Three more earthquakes struck in short succession nearby in the New Britain region following the magnitude 6.3 event.

A magnitude 5.1 quake struck at a depth of 28 km, 38 minutes after the magnitude 6.3 quake. Sixteen minutes later a magnitude 5.0 quake followed, with a magnitude 4.9 event 24 minutes later.

Earthquake activity in the South Pacific region has continued to appear on New Zealand seismometers since, but data is not yet available in the searchable databases. This activity will be due to changes in the tectonic plate boundaries as the stress adjusts to the burst of activity in Papua New Guinea.

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