Mw 6.5 West of Macquarie Island
updated 28 December 2021

On 12 December 2021 a strong earthquake occurred West of Macquarie Island at a depth of 10 km. The seismic event occurred at 08:58:08 UTC and had an estimated moment magnitude (Mw) 6.5.

The earthquake was triggered by lunar geometry, i.e. after the Moon lined up with Jupiter and Neptune on the 9th and 11th respectively and also due to the geometry between Saturn and Uranus on the 11th.

Earth:   Moon-Jupiter     2021-12-09,  8:29:30    0°00'00"
Earth:   Moon-Mars        2021-12-09,  9:35:31   90°00'00"
Earth:   Moon-Neptune     2021-12-11,  3:21:01    0°00'00"
Earth:   Moon-Saturn      2021-12-11, 11:34:56   45°00'00"
Earth:   Moon-Uranus      2021-12-11, 14:29:19   45°00'00"
					
SSGI chart
SSGI depiction of planetary (PG) and lunar (LG) geometry

atmospheric electricity
atmospheric electricity before and during the earthquake