Tonga

Tonga Earthquake Monthly Bulletin – August 2021

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Situation Report
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TONGA SEISMIC BULLETIN

This Bulletin is issued by the Tonga Geological Services to inform the public of earthquakes that occurred within Tonga between 13.00°S – 26.00°S latitudes and 170.00°W – 178.00°W longitudesfromst – 31st August 2021.

Earthquakes:

  • A total of 42 earthquakes occurred within Tonga in the month of August.

  • These are felt earthquakes and earthquakes that were not felt but has magnitudes which are greater than or equal to four.

  • 18 were shallow-focus earthquakes with an average magnitude of 4.8, 12 were intermediatefocus earthquakes with 4.6 average magnitude and 12 were deep-focus earthquakes with 4.4 average magnitude (Refer to Figure 1).