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1943 Alahan Panjang earthquakes

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Magnitude  Mw 7.2
Areas affected  Indonesia
Depth  50 km (31 mi)
1943 Alahan Panjang earthquakes
Date  June 8 and June 9, 1943

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).

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, or Ms 7.1.

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, or Ms 7.4.

Alahan Panjang was damaged in the earthquakes. Right lateral offsets were reported near the town of Solok.

Near the Sumani segment, earthquake doublets occurred repeatedly. Similar earthquake doublet nearby include the earthquakes in 1926 and 2007.

References

1943 Alahan Panjang earthquakes Wikipedia


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