quinta-feira, agosto 16, 2007

Sismo no Peru

Segundo o IUGS - USA, aqui ficam os pormenores do sismo que matou várias centenas de pessoas, em 16.08.2007, no Peru:

Earthquake Details

Magnitude 8.0
  • Wednesday, August 15, 2007 at 23:40:57 UTC
  • Wednesday, August 15, 2007 at 06:40:57 PM at epicenter
Time of Earthquake in other Time Zones
Location 13.353°S, 76.510°W
Depth 39 km (24.2 miles) set by location program
Distances 40 km (25 miles) WNW of Chincha Alta, Peru
105 km (65 miles) NW of Ica, Peru
150 km (95 miles) SSE of LIMA, Peru
200 km (125 miles) SW of Huancayo, Peru
Location Uncertainty horizontal +/- 5.2 km (3.2 miles); depth fixed by location program
Parameters Nst=271, Nph=271, Dmin=155.1 km, Rmss=0.84 sec, Gp= 29°,
M-type=moment magnitude (Mw), Version=9
Event ID us2007gbcv

Earthquake Summary

Small globe showing earthquake Small map showing earthquake

Earthquake Summary Poster

The following is a release by the United States Geological Survey, National Earthquake Information Center: An earthquake occurred NEAR THE COAST OF CENTRAL PERU, about 45 km (25 miles) west-northwest of Chincha Alta or about 145 km (90 miles) south-southeast of Lima at 5:40 PM MDT, Aug 15, 2007 (6:40 PM local time in Peru).

Felt Reports

At least 400 people killed and 1500 injured in the Ica-Lima-Pisco area. Extensive damage at Chincha Alta, Ica and Pisco. Widespread communications and power outages ocurred in the area. Relief efforts were hindered by cracks in the Panamerican Highway.

Tectonic Summary

This earthquake occurred at the boundary between the Nazca and South American tectonic plates. The two plates are converging at a rate of 77 mm 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.

Coastal Peru has a history of very large earthquakes. The August 15 shock originated just south of the source region of the magnitude 8.1 earthquake of October 1974 and just north of the source regions of major earthquakes that occurred in August 1942 (magnitude 7.7) and 1996 (magnitude 7.7). The largest coastal Peru earthquake of the last two centuries was the magnitude 9 earthquake of 1868, which was centered about 700 km southeast of the August 15 earthquake. The 1868 shock produced a tsunami that killed several thousand people along the South American coast and also caused damage in Hawaii.


Earthquake Information for Peru

Earthquake Information for South America

Epicentral Area Seismicity Map jpeg pdf

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