Mw 9.0 Near East Coast of Honshu, Japan
updated 1 May 2022

On 11 March 2011 a great earthquake occurred near the east coast of Honshu, Japan at a depth of 22 km. The seismic event occurred at 05:46:23 UTC and had an estimated moment magnitude (Mw) 9.0.

Critical planetary geometry occurred from 5 to 9 March with no less than five planetary alignments involving Mercury and Venus. Most critical were the alignments on the 6th and 7th converging with a high lunar peak (index 18).

The first seismic increase occurred on the 6th with two strong tremors at Tarapaca, Chile and the South Sandwich Islands Region respectively, peaking Mw 6.6. A day later a Mw 6.4 tremor occurred at the Solomon Islands. Seismic activity began to intensify after Venus aligned with Mars and Uranus on the 7th; a Mw 7.2 earthquake occurred early on the 9th near the east coast of Honshu, Japan, followed by three aftershocks in the low 6 magnitude range, which eventually triggered the great earthquake in the morning of the 11th. Additional Mw 6.5 tremors occurred later on the 9th in the New Britain Region and on the 10th in the Bali Sea.

Mercury-Sun-Saturn        2011-03-05,  8:14:21  192°44'22"
Sun-Mercury-Jupiter       2011-03-05, 11:05:33   13°21'09"
Jupiter-Mercury-Saturn    2011-03-06, 15:58:41  193°00'51"
Venus-Mars-Uranus         2011-03-07,  1:28:56    2°02'53"
Earth-Mercury-Uranus      2011-03-09, 16:00:08  359°42'42"

Earth-Moon-Mercury        2011-03-05, 12:36:11  351°45'55"
Earth-Moon-Uranus         2011-03-06,  4:16:32  359°30'58"
Earth-Moon-Jupiter        2011-03-06, 23:26:00    8°58'46"
Moon-Earth-Saturn         2011-03-07, 13:03:21  195°42'31"

Mercury: Venus-Jupiter    2011-03-09,  8:28:50  135°00'00"
Mercury: Venus-Neptune    2011-03-09, 12:31:12   90°00'00"
Mercury: Venus-Saturn     2011-03-09, 19:44:07   45°00'00"
SSGI chart
SSGI depiction of planetary (PG) and lunar (LG) geometry

SSGI chart
SSGI depiction of total — non-interpreted — geometry