Mw 8.3 Assam, British India
updated 12 June 2022

On 12 June 1897 a great earthquake occurred in Assam, British India at a depth of 34 km. The seismic event occurred at 11:06 UTC and had an estimated moment magnitude (Mw) 8.3.

Critical planetary geometry occurred on 5 June 1897 when Mercury aligned with Earth and Saturn and also with Earth and Uranus with 12 hours (Saturn and Uranus were near conjunct from Earth's perspective). Five days later, on the 10th, Earth aligned with the Sun and Neptune, converging with critical lunar geometry (index 13). On the 12th Mars aligned with the Sun and Jupiter and as these outer planets have a lower orbital velocity, the alignment was already close days earlier, most notably on 8-9 June when Venus made 90° angles with Mars and Saturn and Mars and Uranus respectively. Note that with the critical planetary geometry from 5 to 12 June, all four Jovian planets were involved.

#Tibet, #Shillong, #Himalaya, #HighLunarPeak, #MoonJupiter, #MoonSaturn

Mercury-Earth-Saturn      1897-06-05, 10:50:04  237°34'33"
Mercury-Earth-Uranus      1897-06-05, 22:19:02  237°40'48"
Earth-Sun-Neptune         1897-06-10, 16:57:07   81°26'10"
Sun-Mars-Jupiter          1897-06-12, 22:06:59  165°05'24"

Earth-Moon-Mars           1897-06-05, 13:14:45  131°46'51"
Earth-Moon-Jupiter        1897-06-07,  6:55:33  154°11'12"
Moon-Earth-Venus          1897-06-11, 23:35:37   40°19'46"
Earth-Moon-Saturn         1897-06-13,  2:18:13  237°04'30"
Earth-Moon-Uranus         1897-06-13,  2:50:18  237°24'43"
Moon-Earth-Mercury        1897-06-13,  9:15:08   61°27'25"
Moon-Earth-Neptune        1897-06-14, 17:12:37   81°35'08"
Moon-Earth-Sun            1897-06-14, 23:29:32   85°30'54"

Venus:   Mars-Saturn      1897-06-08, 14:51:03   90°00'00"
Venus:   Mars-Uranus      1897-06-09, 11:58:57   90°00'00"
					
SSGI chart
SSGI COMMON graph of critical planetary (PG) and lunar (LG) geometry

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