Mw 7.9 Azores-Cape St. Vincent Ridge
updated 8 August 2021

On 26 May 1975 a major earthquake occurred at the Azores-Cape St. Vincent Ridge at a depth of 33 km. The seismic event occurred at 09:11:51 UTC and had an estimated moment magnitude (Mw) 7.9.

Two planetary alignments preceded the earthquake, most notably Sun-Mercury-Uranus that coincided with a lunar peak 11 on the index late on the 24th and into the 25th, partly because of a Full Moon.

Earth-Venus-Saturn       1975-05-24,  9:04:17  106°28'53"
Sun-Mercury-Uranus       1975-05-24, 22:33:22  211°12'42"
Moon-Earth-Sun           1975-05-25,  6:31:42   63°47'39"
Venus-Sun-Jupiter        1975-05-27,  7:42:12    7°13'40"
SSGI chart
SSGI depiction of planetary (PG) and lunar (LG) geometry


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