Mw 7.7 Pagan Region, North Mariana Islands
updated 7 August 2021

On 29 July 2016 a major earthquake occurred in the Pagan Region at the North Mariana Islands at a depth of 267 km. The seismic event occurred at 21:18:30 UTC and had an estimated moment magnitude (Mw) 7.7.

Two planetary alignments occurred in the two days leading up to the earthquake, both of which were critical as the two innermost planets, Mercury and Venus lined up with the two outermost planets Uranus and Neptune, which generates the highest amounts of energy due to the greatest possible difference in orbital velocity. Lunar geometry went critical following the two planetary alignments, peaking 12 on the 29th hours before the earthquake occurred.

Mercury-Sun-Uranus       2016-07-27, 16:56:53   21°24'29"
Venus-Sun-Neptune        2016-07-28, 14:06:56  340°10'28"
SSGI chart
SSGI depiction of planetary (PG) and lunar (LG) geometry


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