2010 Pichilemu earthquake

From Wikipedia, the free encyclopedia
Jump to: navigation, search
March 2010 Pichilemu earthquakes
Earthquake intensity
Date 11:39:48, 11 March 2010 (UTC-3) (2010-03-11T11:39:48UTC-3)
Magnitude 6.9 Mw
Depth 31.2 kilometres (19 mi)[1]
Epicenter location Pichilemu, Chile
Countries or regions affected Chile
Max. intensity MM X

A 6.9 earthquake occurred on March 11, 2010, 40 kilometers southwest of Pichilemu, O'Higgins Region, Chile .[2][3][4][5][6] A tsunami warning was made by the Pacific Tsunami Warning Center Pacific-wide, although they warned of the possibility of local tsunamis within 100 kilometers of the epicenter (between San Antonio and Concepción).[7]

Although news media first reported the earthquake as an aftershock of the February earthquake,[5][8] the initial geological summary given by the United States Geological Survey [9] said it was a different earthquake. Though unchained by the regional stress caused by the February 27 earthquake, the March event was not a fast adjustment to February's thrust fault rupture between the Nazca and South American plates, but it was caused by normal faulting inside one of those plates. However, it has not been positively decided in which plate the earthquake occurred.

Within 6 hours, 10 aftershocks took place, of these 2 were of magnitude 6 or greater and 7 between magnitude 5 and 6.[10]

The earthquake took place shortly before the new president, Sebastián Piñera, was sworn in, at about 12:15 PM local time (15:15 UTC), at the Chilean congress in Valparaíso, where the shaking was clearly felt. The presidents of Bolivia, Paraguay, and Ecuador were present when the earthquake occurred, however, the television footage showed that the inauguration was not interrupted.[11]

Damages reported by the Chilean news media include a collapsed pedestrian crossing over Chile Highway 5, north of Rancagua.[12] The most affected place by the earthquake was Pichilemu, the epicentre of the earthquake. It destroyed the Ross Park, the most of the Agustín Ross Cultural Centre and many houses in Espinillo and Rodeillo.[13]

May 2, 2010 aftershock[change | change source]

May 2010 Pichilemu earthquake
Aftershock on May 2
Date 10:52:39, 2 May 2010 (UTC-4) (2010-05-02T10:52:39UTC-4)
Magnitude 5.9 Mw
Depth 35.9 kilometres (22 mi)[14]
Epicenter location Pichilemu, Chile
Countries or regions affected Chile
Max. intensity MM VI

The May, 2 2010 Pichilemu earthquake was a magnitude 6.0 MW earthquake that struck off Pichilemu, Chile, at 10:52 AM on May 2, 2010 at the epicenter, at a depth of 31 kilometres (19 mi). USGS described that the epicenter was 70 kilometres (43 mi) south-southwest of San Antonio, 105 kilometres (65 mi) west Regional capital of Rancagua, 105 kilometres (65 mi) northwest of Curicó and 140 kilometres (87 mi) southwest of the Chilean capital of Santiago.[15]

After almost exactly three hours later a second quake occurs in the same area with an intensity of 4.8 MW[16]

More than 10 aftershocks were produced in May 2 and 3.

Related pages[change | change source]

References[change | change source]

  1. UNIVERSIDAD DE CHILE, SERVICIO SISMOLOGICO
  2. Magnitude 6.9 - LIBERTADOR O'HIGGINS, CHILE, U.S. Geological Survey, March 11, 2010, http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/us2010tsa6.php Archived 20 April 2012 at WebCite
  3. Doce réplicas con epicentro en Pichilemu, El Carabobeño, March 11, 2010, http://www.el-carabobeno.com/p_pag_not.aspx?art=a120310i02&id=t120310-i02
  4. El Mayor Fue de 7,2° Richter, Chile.com, March 11, 2010, http://www.chile.com/tpl/articulo/detalle/ver.tpl?cod_articulo=118476
  5. 5.0 5.1 "New Chile quake as Pinera sworn in as president". BBC News. 11 March 2010. http://news.bbc.co.uk/2/hi/americas/8561340.stm.
  6. http://24horas.cl/videos.aspx?id=63158[dead link]
  7. Tsunami Information Bulletin, Pacific Tsunami Warning Center, March 11, 2010, http://www.prh.noaa.gov/ptwc/messages/pacific/2010/pacific.2010.03.11.145212.txt Archived 20 April 2012 at WebCite
  8. Chile president vows to rebuild
  9. Geological summary by the USGS
  10. USGS list of earthquakes. Retrieved March 12. Archived 12 March 2011 at WebCite
  11. Three strong earthquakes strike Chile in quick succession - CNN.com
  12. El Mercurio online, March 11
  13. Pichilemu devastado, Canal 13 (Chile), March 16, 2010.
  14. UNIVERSIDAD DE CHILE, SERVICIO SISMOLOGICO
  15. "Magnitude 6.0 - LIBERTADOR O'HIGGINS, CHILE". USGS. 2010-5-2. http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/us2010vubl.php#details. Retrieved 2010-5-2.
  16. "Magnitude 4.8 - OFFSHORE LIBERTADOR O'HIGGINS, CHILE". USGS. 2010-5-2. http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/us2010vubw.php. Retrieved 2010-5-2.