Mw 8.3 Offshore Coquimbo, Chile
updated 30 May 2021 UTC

On 16 September 2015 a great earthquake occurred off the coast of Coquimbo, Chile. The seismic event occurred at 22:54:31 UTC and had an estimated moment magnitude (Mw) 8.3. The earthquake was followed by a major aftershock within half an hour.

The earthquake occurred about six hours before Earth lined up between Jupiter and Neptune, while a Mercury-Sun-Mars alignment occurred a day earlier. In the morning of the 16th a WPG peak occurred while the Moon made critical geometry with both Jupiter and Neptune. This was the third major seismic event that was successfully forecast by Ditrianum (forecasts started in April 2015). The forecast was based on Earth's close alignment with Jupiter and Neptune and a seismic increase was anticipated to occur around the 17th. It should be noted that lunar geometry and WPG geometry was not considered at the time and that the SSGI chart was not yet developed.

Mercury-Sun-Mars         2015-09-15, 17:39:27  126°58'09"
Jupiter-Earth-Neptune    2015-09-17,  5:42:22  337°44'48"

Earth:   Moon-Jupiter     2015-09-16,  0:26:11   45°00'00"
Earth:   Moon-Neptune     2015-09-16,  1:01:42  135°00'00"
SSGI chart
SSGI depiction of planetary (PG) and lunar (LG) geometry


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