Mw 7.0 Near East Coast of Honshu, Japan

updated 27 September 2023

report

On 20 March 2021 a major earthquake occurred near the East Coast of Honshu, Japan at a depth of 40 km. The seismic event occurred at 09:09:44 UTC and had an estimated moment magnitude (Mw) 7.0.

The estimated primary trigger of this seismic event is a convergence of planetary conjunctions on 16 March 2021.

On 14 March a planetary conjunction occurred with Earth, Venus and Neptune. It was followed by two planetary conjunctions on 16 March, also involving Venus. The first conjunction occurred at 12:39 UTC with Mars, Venus and Saturn. The second conjunction with the Sun, Venus and Neptune occurred 5 hours later. The planetary geometry was followed by a lunar conjunction with Uranus early on 17 March. A first strong tremor occurred later on 16 March, following the planetary conjunctions.

#MoonUranus


SSGI

SSGI chart
SSGI COMMON graph of critical planetary (PG) and lunar (LG) geometry

SSGI chart
SSGI SUM graph of critical planetary (PG) geometry

geometry

Earth-Venus-Neptune       2021-03-14, 04:01:21  350°28'05"
Mars-Venus-Saturn         2021-03-16, 12:39:11  302°33'11"
Sun-Venus-Neptune         2021-03-16, 17:40:59  350°22'58"
Mars-Venus-Jupiter        2021-03-22, 20:16:05  307°07'10"

Sun:     Mercury-Venus    2021-03-13, 01:50:25   90°00'00"
Sun:     Mercury-Neptune  2021-03-15, 04:33:18   90°00'00"
Sun:     Mercury-Saturn   2021-03-15, 06:26:50   45°00'00"
Venus:   Earth-Jupiter    2021-03-15, 21:47:41  135°00'00"
Earth:   Venus-Uranus     2021-03-16, 03:39:28   45°00'00"
Sun:     Mercury-Uranus   2021-03-16, 19:58:18  135°00'00"
Sun:     Venus-Saturn     2021-03-16, 21:34:13   45°00'00"
Sun:     Mercury-Earth    2021-03-17, 13:08:34   90°00'00"
Earth:   Venus-Saturn     2021-03-17, 16:35:11   45°00'00"
Sun:     Mercury-Jupiter  2021-03-18, 01:07:04   45°00'00"
Venus:   Earth-Uranus     2021-03-18, 23:39:56  135°00'00"
Sun:     Venus-Uranus     2021-03-19, 14:20:49   45°00'00"
Venus:   Mars-Neptune     2021-03-20, 06:04:48  135°00'00"
Venus:   Mercury-Saturn   2021-03-21, 05:37:18   90°00'00"
Sun:     Venus-Jupiter    2021-03-21, 21:45:42   45°00'00"
Venus:   Mercury-Neptune  2021-03-22, 20:38:06  135°00'00"

Earth-Moon-Venus          2021-03-13, 02:50:17  349°09'35"
Earth-Moon-Neptune        2021-03-13, 05:16:08  350°25'56"
Earth-Moon-Sun            2021-03-13, 09:42:00  352°44'47"
Earth-Moon-Uranus         2021-03-17, 03:00:16   37°59'14"
Earth-Moon-Mars           2021-03-19, 17:47:43   68°51'32"

Earth:   Moon-Uranus      2021-03-13, 09:50:18   45°00'00"
Earth:   Moon-Saturn      2021-03-13, 12:59:55   45°00'00"
Earth:   Moon-Jupiter     2021-03-14, 08:00:42   45°00'00"
Earth:   Moon-Mercury     2021-03-15, 02:16:07   45°00'00"
Earth:   Moon-Mars        2021-03-15, 17:53:44   45°00'00"
Earth:   Moon-Neptune     2021-03-16, 22:07:26   45°00'00"
Earth:   Moon-Venus       2021-03-17, 05:38:41   45°00'00"
Earth:   Moon-Saturn      2021-03-17, 06:43:03   90°00'00"
Earth:   Moon-Sun         2021-03-17, 10:40:32   45°00'00"
Earth:   Moon-Jupiter     2021-03-18, 03:37:27   90°00'00"
Earth:   Moon-Mercury     2021-03-19, 08:47:40   90°00'00"
Earth:   Moon-Neptune     2021-03-20, 17:44:51   90°00'00"
Earth:   Moon-Uranus      2021-03-20, 22:39:38   45°00'00"
Earth:   Moon-Saturn      2021-03-21, 02:40:01  135°00'00"
Earth:   Moon-Venus       2021-03-21, 11:24:59   90°00'00"
Earth:   Moon-Sun         2021-03-21, 14:01:22   90°00'00"
Earth:   Moon-Jupiter     2021-03-21, 23:55:31  135°00'00"
  					

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