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1982 El Salvador earthquake

Earthquake in Central America

Earthquake in Central America

FieldValue
name1982 El Salvador earthquake
map2{{Location map+Central Americarelief=1
{{Location map~Central Americalat14.61long=-90.54label_size=100label=Guatemala Cityposition=topmark=Green pog.svg}}
{{Location map~Central Americalat14.1long=-87.21label_size=100label=Tegucigalpamark=Green pog.svg}}
{{Location map~Central Americalat12.14long=-86.25label_size=100label=Managuamark=Green pog.svg}}
{{Location map~Central Americalat9.93long=-84.08label_size=100label=San Josémark=Green pog.svg}}
{{Location map~Central Americalat13.31long=-89.34mark=Bullseye1.pngmarksize=40}}
AlternativeMapRelief map of Central America.jpg
width250
floatright
caption}}
timestamp1982-06-19 06:21:58
isc-event597450
anss-urliscgem597450
local-date
local-time00:21:58
duration25 s (shaking felt)
magnitude7.3
depth73 km
location
typeNormal
affectedEl Salvador
damages$5 million
intensity
pga
pgv
landslideYes
casualties16–43 dead

| isc-event = 597450 | anss-url = iscgem597450 | local-date = | local-time = 00:21:58

The 1982 El Salvador earthquake occurred southeast of San Salvador on 19 June at 00:21 local time (06:21 UTC). This undersea earthquake struck offshore in the Pacific Ocean and had a surface wave magnitude of 7.3 and a maximum Mercalli intensity of VII (Very strong). Occurring adjacent to a subduction zone at the Middle America Trench, this normal-slip shock left at least 16 and as many as 43 people dead, and many injured, and also inflicted $5 million in damage.

Tectonic setting

Near the Salvadorian coast, the Cocos plate is subducting beneath the Caribbean plate at the Middle America Trench. This earthquake was an intra-slab, normal-slip subduction earthquake in the subducting plate. The subduction zone and a local system of faults along the volcanic chain are two major sources of the earthquakes in El Salvador.

Earthquake

The mechanism of this earthquake had many similarities with the El Salvador earthquake of 13 January 2001.

Intensity

The intensity in San Salvador reached VII (Very strong). The most affected cities are San Salvador, Ahuachapán, Concepción de Ataco, Comasagua, San Miguel, San Pedro Nonualco, and San Juan Tepezontes. This earthquake could be felt in Guatemala, Honduras, Nicaragua, and Costa Rica, with intensities V (Moderate) in Guatemala City, Guatemala, IV (Light) in Tegucigalpa, Honduras, V in Managua, Nicaragua, and III (Weak) in San José, Costa Rica.

References

References

  1. "M 7.3 – 18 km SSW of La Libertad, El Salvador". United States Geological Survey.
  2. (2004). "Triggering of destructive earthquakes in el Salvador". Geology.
  3. (2002). "The el Salvador earthquakes of January and February 2001: Context, characteristics and implications for seismic risk". Soil Dynamics and Earthquake Engineering.
  4. [http://www.snet.gob.sv/Geologia/Sismologia/1isosista.htm isosistas]. Snet.gob.sv (10 October 1986). Retrieved 25 October 2011.
  5. "Archived copy".
  6. [https://earthquake.usgs.gov/earthquakes/eqarchives/significant/sig_1982.php Significant Earthquakes of the World] {{Webarchive. link. (4 December 2009 . Earthquake.usgs.gov (5 January 2010). Retrieved 25 October 2011.)
  7. "Archived copy".
  8. (2004). "The Seismic Performance of Bahareque Dwellings in El Salvador".
  9. National Geophysical Data Center / World Data Service (NGDC/WDS). (1972). "Significant Earthquake Database". [[National Geophysical Data Center]], [[National Oceanic and Atmospheric Administration.
  10. (4 September 2009). "PAGER-CAT Earthquake Catalog". United States Geological Survey.
  11. (2004). "Special Paper 375: Natural Hazards in el Salvador".
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