UTC time | Doublet earthquake: |
---|---|
1943-06-08 20:42:46 | |
1943-06-09 03:06:20 | |
ISC event | |
899871 | |
899872 | |
USGS-ANSS | |
ComCat | |
ComCat | |
Local date | June 9, 1943 [1] |
Local time | |
03:42:46 | |
10:06:20 | |
Magnitude | |
Ms 7.5 [2] | |
Ms 7.8 [3] | |
Depth | 15 km (9.3 mi)[2] 10 km (6.2 mi)[3] |
Epicenter | 1°00′S 101°00′E / 1.0°S 101.0°E [1] |
Areas affected | Indonesia |
Max. intensity | IX (Destructive) (both events)[4] |
The 1943 Alahan Panjang earthquakes occurred on June 8 and June 9 UTC (June 9, 1943, local time) in Sumatra, then under Japanese occupation. This was an earthquake doublet (the shocks occurred at the same location on consecutive days).[5]
The first mainshock occurred on June 8 at 20:42 UTC. It ruptured the Suliti segment of the Sumatran Fault Zone. The magnitude was given as Mw 7.2,[1] or Ms 7.1.[6]
The second mainshock occurred on June 9 at 03:06 UTC. It ruptured the Sumani segment of the Sumatran Fault Zone and perhaps the northwestern part of the Suliti segment. The magnitude was given as Mw 7.5,[1] or Ms 7.4.[6]
Alahan Panjang was damaged in the earthquakes.[5] Right lateral offsets were reported near the town of Solok.[6]
Near the Sumani segment, earthquake doublets occurred repeatedly.[7] Similar earthquake doublet nearby include the earthquakes in 1926 and 2007.[8]
Engdahl
was invoked but never defined (see the help page).Martin
was invoked but never defined (see the help page).