Mw 6.9 South Sandwich Islands Region
updated 16 August 2021

On 16 August 2021 a strong earthquake occurred in the South Sandwich Islands Region at a depth of 10 km. The seismic event occurred at 11:10:36 UTC and had an estimated moment magnitude (Mw) 6.9.

It is the strongest aftershock since the major earthquakes in the region on 12 August (Mw 7.7 and Mw 8.0). This aftershock is not directly related to planetary or lunar geometry.

atmospheric electricity
atmospheric electricity prior and during the earthquake

 

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