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1943 Alahan Panjang earthquakes

From Wikipedia, the free encyclopedia

1943 Alahan Panjang earthquakes
UTC timeDoublet earthquake:    
 1943-06-08 20:42:46
 1943-06-09 03:06:20
ISC event 
 899871
 899872
USGS-ANSS 
 ComCat
 ComCat
Local dateJune 9, 1943 [1]
Local time
Magnitude 
 Ms 7.5 [2]
 Ms 7.8 [3]
Depth15 km (9.3 mi)[2]
10 km (6.2 mi)[3]
Epicenter1°00′S 101°00′E / 1.0°S 101.0°E / -1.0; 101.0 [1]
Areas affectedIndonesia

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).[4]

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.[5]

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.[5]

Alahan Panjang was damaged in the earthquakes.[4] Right lateral offsets were reported near the town of Solok.[5]

Near the Sumani segment, earthquake doublets occurred repeatedly.[6] Similar earthquake doublet nearby include the earthquakes in 1926 and 2007.[7]

See also

References

  1. ^ a b c d Engdahl, E. R.; Vallaseñor, A. (2002). "Global seismicity: 1900–1999" (PDF). International Handbook of Earthquake & Engineering Seismology. Part A, Volume 81A (First ed.). Academic Press. p. 678. ISBN 978-0124406520.
  2. ^ a b ISC-OB Event 899871 [IRIS].
  3. ^ a b ISC-OB Event 899872 [IRIS].
  4. ^ a b Natawidjaja, D. H.; Triyoso, W. (2007), "The Sumatran Fault Zone — from Source to Hazard", Journal of Earthquake and Tsunami, 01: 21, doi:10.1142/S1793431107000031
  5. ^ a b c Natawidjaja, D. H. (2003), Neotectonics of the Sumatran fault and paleogeodesy of the Sumatran subduction zone, Dissertation (Ph.D.), California Institute of Technology, Bibcode:2003PhDT.........7N
  6. ^ Nakano, M.; Kumagai, H.; Toda, S.; Ando, R.; Yamashina, T.; Inoue, H.; Sunarjo (2010), "Source model of an earthquake doublet that occurred in a pull-apart basin along the Sumatran fault, Indonesia", Geophysical Journal International, 181 (1): 141–153, Bibcode:2010GeoJI.181..141N, doi:10.1111/j.1365-246X.2010.04511.x
  7. ^ Aydan, Ö. (2007), A reconnaissance report on the 2007 Singkarak Lake (Solok) earthquake with and emphasis on the seismic activity of Sumatra Fault following the 2004 and 2005 great off-Sumatra earthquakes (PDF), Japan Society of Civil Engineers

External links

This page was last edited on 1 September 2020, at 00:08
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