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2001 southern Peru earthquake

2001 southern Peru earthquake

From Wikipedia, the free encyclopedia
2001 southern Peru earthquake

Map of the Peru coastline, showing location and strength of quake. Star marks epicenter.
DateJune 23, 2001
Magnitude8.4 Mw
Depth33 kilometres (21 mi)
Epicenter16.26°S 73.64°W
Countries or regions Peru
Casualties75 confirmed dead, 2,687 injured[1]

The 2001 southern Peru earthquakewas a magnitude 8.4 earthquake that occurred at 20:33:14 UTC (15:33:14 local time) on Saturday, June 23, 2001. The quake affected the Peruvianregions of Arequipa, Moquegua andTacna. It was the most devastating earthquake in Peru since the catastrophic 1970 Ancash earthquakeand globally the largest earthquake since the 1965 Rat Islands earthquake.

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[edit]Tectonics and background

The earthquake occurred at the boundary between the Nazca andSouth American plates. The two plates are converging towards each other at a rate of about 78mm per year. The earthquake occurred as thrust-faulting on the interface between the two plates, with the South American plate moving up and seaward over the Nazca plate. Southwestern Peru has a history of very large earthquakes. The June 23 shock originated just southeast of the source of a magnitude 7.7 earthquake that occurred in 1996, and it appears to have involved rupture of part of the plate boundary segment that produced an earthquake of magnitude approximately 9.0 in 1868. The 1868 earthquake was destructive in towns that were heavily damaged in the June 23 earthquake. The 1868 earthquake produced a tsunami that killed thousands of people along the South American coast and also caused damage in Hawaii and alarm in Japan. The initial onset consists of two events separated by about 6 seconds. It is followed by at least one larger complex event occurring about 40 seconds later.[1]

[edit]Damage and casualties

At least 75 people were killed, including 26 killed by a tsunami. 2,687 were injured, 17,510 homes were destroyed and 35,549 homes damaged in the Arequipa-Camana-Tacna area. An additional 64 people were missing due to the tsunami in the Camana-Chala area. Landslides blocked highways in the epicentral area. Many of the historic buildings in Arequipa were damaged or destroyed, including the left tower of theBasilica Cathedral of Arequipa. Restoration was completed on the tower on June 30, 2002.

Some people were injured and damage was reported in the Arica, Chile area. Felt at Arica, at Iquique, at Calama and at Tocopilla, Chile. Felt strongly in much of southern Peru and northern Chile. Also felt in Bolivia. Tsunami runup heights near Camana are estimated from field evidence to have reached approximately 7m at some locations; at other locations, the tsunami inundation distance extended more than 1 km inland from the coast. Tsunami wave heights (peak-to-trough) recorded from selected tide stations: 2.5m at Arica; 1.5m at Iquique; 1.0m at Coquimbo, Chile.[1]

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