1956 Chim earthquake

1956 Chim earthquake
UTC time Doublet earthquake:    
  A: 1956-03-16 19:32:43
  B: 1956-03-16 19:43:31
ISC event  
  A: 888079
  B: n/a
USGS-ANSS ComCat
Local date March 16, 1956 (1956-03-16)
Local time 21:32:43
Magnitude  
  A: 5.3 Mw
  B: 5.5 Mw
Epicenter 33°47′N 35°35′E / 33.78°N 35.58°E / 33.78; 35.58Coordinates: 33°47′N 35°35′E / 33.78°N 35.58°E / 33.78; 35.58
Areas affected Lebanon
Casualties 136

The 1956 Chim earthquake was a destructive multiple-shock event that occurred on March 16 in Lebanon along a strand of the Dead Sea Transform (DST) fault system.[1] The epicenter was located in the south of Lebanon in the Chouf District. Six thousand homes were destroyed and another 17,000 were damaged. The number of persons killed was 136.[2]

Tectonic setting

The DST is a 1,609 km (1,000 mi) long transform fault that runs in a mostly north-south direction from the northern end of the Red Sea along the Jordan Rift Valley to the Taurus Mountains complex in southern Turkey. The left-lateral fault zone marks the boundary of the Arabian Plate and the Sinai-Levantine block and consists of multiple parallel faults.[3] As the fault moves through Lebanon and Syria the fault trace follows a restraining bend and splits into several strands that include the Serghaya, Rachaya, and Roum faults, as well as the prominent Yammouneh fault.[4]

Earthquake

The Roum fault runs for a length of 35 kilometers (22 mi) between the Hula basin the Awali river and is the westernmost strand of the fault system in that area. A paleoseismic trench investigation revealed that it may have been the source of the twin-shock event.[5]

The twin shocks were separated by less than fifteen minutes with the first event occurring at 19:32 and the second event at 19:43 hours.[2] The initial shock was estimated to measure (Mw = 5.3) and the second event was rated (Mw = 5.5).

See also

References

  1. ↑ Galey, Patrick (March 12, 2010). "Scientists predict large Lebanon earthquake looming". The Daily Star.
  2. 1 2 Brazee, Rutlage J.; Cloud, William K. (1956), United States Earthquakes, United States Department of Commerce / U.S. National Geodetic Survey, p. 50
  3. ↑ Daeron, M.; Klinger, Y.; Tapponnier, P.; Elias, A.; Jacques, E.; Sursock, A. (2005), "Sources of the large A.D. 1202 and 1759 Near East earthquakes" (PDF), Geology, 33 (7): 529, Bibcode:2005Geo....33..529D, doi:10.1130/G21352.1
  4. ↑ Mohamad, Randa; Nasser Darkal, Abdul; Seber, Dogan; Sandvol, Eric; Gomez, Francisco; Barazangi, Muawia (2000), "Remote Earthquake Triggering along the Dead Sea Fault in Syria following the 1995 Gulf of Aqaba Earthquake (Ms = 7.3)", Seismological Research Letters, 71 (1): 48, Bibcode:2017SeiRL..88.1290C, doi:10.1785/gssrl.71.1.47, hdl:1813/5321
  5. ↑ Nemer, Tony; Meghraoui, Mustapha (2006), "Evidence of coseismic ruptures along the Roum fault (Lebanon): a possible source for the AD 1837 earthquake", Journal of Structural Geology, 28 (8): 1483–1495, Bibcode:2006JSG....28.1483N, doi:10.1016/j.jsg.2006.03.038
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