1942 Guatemala earthquake

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1942 Guatemala earthquake
Relief map of Central America.jpg
Bullseye1.png
UTC  time1942-08-06 23:37:02
ISC  event 900408
USGS-ANSS ComCat
Local dateAugust 6, 1942
Local time17:37
Magnitude Mw 7.7 [1]
Ms 7.9 [2] [3]
Depth35 km (22 mi)
Epicenter 13°47′N90°55′W / 13.78°N 90.91°W / 13.78; -90.91
Areas affected Guatemala
Casualties38 killed

The 1942 Guatemala earthquake occurred at 17:37 local time on August 6 and had ratings of 7.7 on the moment magnitude scale and 7.9 on the surface wave magnitude scale. The epicenter was located off the southern coast of Guatemala, [4] and it was one of the strongest earthquakes ever recorded there.

Contents

The earthquake caused widespread damage in the west-central highlands of Guatemala. Thirty-eight people died in the earthquake. Landslides caused by the combination of the earthquake and the heavy seasonal rains destroyed roads, the Inter-American Highway, and telegraph lines. In Tecpán, in the department of Chimaltenango, more than 60% of the houses were demolished. Damage was reported in some buildings in Antigua Guatemala, including the Palacio de Los Capitanes Generales and some catholic churches. [5] [6] The earthquake could also be felt strongly in Mexico and El Salvador. [7]

This earthquake was a lower crustal intraplate earthquake with a compressional focal mechanism. [3] [8] [ page needed ] Tensional activity has been dominant along the down-dip edge along the 1942 rupture zone. [9] It was estimated that earthquakes near the Middle America Trench with magnitudes of about 7.5~8.0 occurred at intervals of 94 ± 54 yrs in southwestern Guatemala. Such historical earthquakes included the earthquakes in 1765, 1902, and 1942. [10]

See also

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References

  1. ↑ 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. ↑ Dmowska & Lovison 1988, p. 657
  3. 1 2 Astiz, Luciana; Kanamori, Hiroo (1984), "An earthquake doublet in Ometepec, Guerrero, Mexico" (PDF), Physics of the Earth and Planetary Interiors, Elsevier, 34 (1–2): 41, Bibcode:1984PEPI...34...24A, doi:10.1016/0031-9201(84)90082-7, archived from the original (PDF) on 2010-07-23, retrieved 2012-08-04
  4. ↑ Monzón-Despang, Héctor (February 1996), La construcción y el uso del terreno en Guatemala : Su vulnerabilidad sísmica (PDF), Asociacion Guatemalteca de Ingenieros Estrucurales, pp. 107–121, retrieved August 3, 2012[ permanent dead link ]
  5. ↑ ABC (August 11, 1942). "Mundo Hispanoamericano – Fuerte seísmo en Guatemala. Ocho muertos y cuarenta heridos". ABC . p. 17. Retrieved August 3, 2012.
  6. ↑ "Sismología". Instituto Nacional de Sismología, Vulcanología, Meteorología e Hidrología . Retrieved August 3, 2012.
  7. ↑ "Historic Earthquakes — Guatemala, 1942 August 06 23:36 UTC". United States Geological Survey. Archived from the original on 2016-04-30. Retrieved August 3, 2012.
  8. ↑ Dmowska & Lovison 1988
  9. ↑ Lay, Thorne; Astiz, Luciana; Kanamori, Hiroo; Christensen, Douglas (1989). "Temporal variation of large intraplate earthquakes in coupled subduction zones" (PDF). Physics of the Earth and Planetary Interiors. Elsevier. 54 (3–4): 273. Bibcode:1989PEPI...54..258L. doi:10.1016/0031-9201(89)90247-1. hdl: 2027.42/27966 .
  10. ↑ White, Randall A.; Ligorría, Juan Pablo; Cifuentes, Ines Lucia (2004). "Seismic history of the Middle America subduction zone along El Salvador, Guatemala, and Chiapas, Mexico: 1526–2000". GSA Special Papers. Geological Society of America. 375: 379–396. doi:10.1130/0-8137-2375-2.379. ISBN   978-0-8137-2375-4.

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