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.
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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"