1942 Peru earthquake

1942 Peru earthquake
UTC time 1942-08-24 22:50:31
ISC event 900444
USGS-ANSS ComCat
Local date August 24, 1942 (1942-08-24)
Local time 17:50
Magnitude Mw 8.2
Depth 35 km (22 mi) [1]
Epicenter 14°59′S 74°55′W / 14.98°S 74.92°W / -14.98; -74.92 [1]
Type Megathrust
Areas affected Peru
Max. intensity IX (Violent)
Casualties 30

The 1942 Peru earthquake occurred on August 24 at 17:50 local time and was located near the border of the departments of Ica and Arequipa, Peru. It had a magnitude of Mw 8.2 or Ms 8.4.[2][3][4]

Earthquake

This is a megathrust earthquake which ruptured part of the boundary between the Nazca Plate and the South American Plate.[5][6] In this area, the Nazca Plate is subducting beneath the South America Plate with a convergence vector of about 7.6 cm/yr. Much of the rupture zone of the 1942 earthquake overlapped with that of the 1996 Nazca earthquake. The rupture zone of the 1942 earthquake was about 40 km longer than that of the 1996 earthquake.[7] The epicenter of the 1942 earthquake was very close to, but slightly southeast of, that of the 1996 earthquake.[8] The energy released by the 1942 earthquake was about 2.5×1017 Nm.[4]

Damage

The earthquake caused 30 deaths and 25 injuries. Building damage was noteworthy in the epicentral area. About 30% of the buildings in the city of Nazca were ruined. There were slides in the hills. The intensity reached IX (Violent).[2]

Tsunami

This earthquake triggered a tsunami. In Callao, the amplitude of the oscillations of the tsunami was 1.6 m.[9] In Lomas, the sea receded more than 200 m, and then it flooded the settlement with injuries reported.[10]

See also

References

  1. 1 2 Engdahl, E. R.; Vallaseñor, A. (2002). "Global seismicity: 1900–1999". International Handbook of Earthquake & Engineering Seismology (PDF). Part A, Volume 81A (First ed.). Academic Press. p. 678. ISBN 978-0124406520.
  2. 1 2 https://earthquake.usgs.gov/earthquakes/world/events/1942_08_24.php
  3. ↑ Ruff, L. J (1989), "Do trench sediments affect great earthquake occurrence in subduction zones?", Pure and Applied Geophysics, 129: 263, Bibcode:1989PApGe.129..263R, doi:10.1007/BF00874629
  4. 1 2 "Archived copy" (PDF). Archived from the original (PDF) on 2013-10-20. Retrieved 2012-09-27.
  5. ↑ Chlieh, M.; Perfettini, H.; Tavera, H.; Avouac, J.-P.; Remy, D.; Nocquet, J.-M.; Rolandone, F.; Bondoux, F.; Gabalda, G.; Bonvalot, S. (2011), "Interseismic coupling and seismic potential along the Central Andes subduction zone" (PDF), Journal of Geophysical Research, 116: B12405, Bibcode:2011JGRB..11612405C, doi:10.1029/2010JB008166
  6. ↑ http://www2.ess.ucla.edu/~giovanni/new_site/Giovanni_etal_2002.pdf
  7. ↑ ftp://white-dome.gps.caltech.edu/pub/avouac/Ge277-2007-fall/Spence_PAG1999.pdf
  8. ↑ Swenson, J. L; Beck, S. L (1999), "Source Characteristics of the 12 November 1996 M w 7.7 Peru Subduction Zone Earthquake", Pure and Applied Geophysics, 154 (3–4): 731, Bibcode:1999PApGe.154..731S, doi:10.1007/s000240050250
  9. ↑ National Geophysical Data Center / World Data Service (NGDC/WDS), Significant Earthquake Database, National Geophysical Data Center, NOAA, doi:10.7289/V5TD9V7K
  10. ↑ http://desastres.unanleon.edu.ni/pdf2/2005/enero/parte1/pdf/spa/doc9644/doc9644-b5.pdf%5Bpermanent+dead+link%5D
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