Earthquake in Pichilemu 2010

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Earthquake in Pichilemu 2010
Earthquake in Pichilemu 2010 (Chile)
Bullseye1.svg
Coordinates 34 ° 15 '32 "  S , 71 ° 55' 44"  W Coordinates: 34 ° 15 '32 "  S , 71 ° 55' 44"  W
date March 11, 2010
Time 11:39 a.m. local time (2:39 p.m. UTC )
Magnitude 6.9  M W
depth 11 km
epicenter Pichilemu , O'Higgins Region
(40 km southwest of Pichilemu )
country Chile
Affected places
dead 2


Destroyed balustrades at Ross Park in Pichilemu

The 2010 Pichilemu earthquake was a severe earthquake with a magnitude of 6.9 M w and occurred on March 11, 2010 . The epicenter was about 40 km southwest of Pichilemu in the Región de O'Higgins , Chile .

Course and circumstances of the quake

Shortly after the devastating earthquake of February 27, the center of Chile was again shaken by several severe tremors on March 11, 2010, which the US earthquake observatory (NEIC) measured with magnitudes between 4.9 and 6.9. After the recent earthquakes that occurred at noon during the inauguration of the new Chilean President Sebastián Piñera , the Chilean authorities issued a precautionary tsunami warning. The epicenter of the three most violent tremors with magnitudes of 6.9, 6.7 and 6.0 was on the coast of the VI. Region (Libertador O'Higgins) , around 40 km southwest of Pichilemu and around 140 km south of the city of Valparaíso , where the handover ceremony took place. People in Valparaíso and other coastal towns fled to the hills for fear of a tidal wave.

Although the epicenter of the earthquake was in the sea, the Pacific Tsunami Warning Center did not issue a general warning of a tsunami . However, the warning center also indicated that there was a possibility of local tsunamis in the area between La Serena and Concepción .

The inauguration ceremony of the new President Piñera in front of the Chilean Congress building in Valparaíso continued as planned, as the television broadcast showed, despite the tremor, which was clearly noticeable shortly before the swearing-in ceremony, which was scheduled for 12:15 p.m. local time (3:15 p.m. UTC ).

Background and tectonics

Although the media often referred to the earthquake as the aftershock of the great earthquake of February 27, 2010, the United States Geological Survey assessed the earthquake as a stand-alone event in its preliminary geological assessment. Although the March 11 quake was caused by regional tensions resulting from the February 27 earthquake, it was not a direct consequence of the thrust between the South American plate and the Nazca plate , but was caused by normal faults in one of these plates. In the region around Pichilemu 10,000 aftershocks were localized, these are located in all depth ranges between 5 km and the plate boundary of the South American plate and the Nazca plate in 25 km and thus in the South American plate. These aftershocks took place on a south-westerly dipping area and mainly indicate extensional earthquake mechanisms.

Damage

The hardest hit location was Pichilemu, near the epicenter of the earthquake. The historically important parks of Parque Agustín Ross and part of the neighboring Ross Casino monument as well as many houses in the Espinillo and Rodeíllo districts were damaged. Two people were killed by the effects of the earthquake: one person died in Pichilemu and one man died of heart failure in Talca during the quake.

Aftershocks

There were ten aftershocks within the next six hours, two of which reached an intensity of 6.0 or higher on the moment magnitude scale, and seven others were between 5.0 and 6.0. During the following four days there were numerous aftershocks with an intensity of up to 5.0 MW . A total of 10,000 aftershocks with magnitudes between 1 and 5.7 were registered in the region around Pichilemu.

Web links

Commons : Earthquake in Pichilemu 2010  - Collection of pictures, videos and audio files

Individual evidence

  1. ↑ Magnitude 6.9 - LIBERTADOR O'HIGGINS, CHILE ( English ) US Geological Survey. March 11, 2010. Archived from the original on March 14, 2010. Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved March 29, 2010. @1@ 2Template: Webachiv / IABot / earthquake.usgs.gov
  2. ^ New Chile quake as Pinera sworn in as president . BBC News. March 11, 2010. Retrieved December 25, 2010.
  3. ↑ 24 Horas - Réplica: Onemi sitúa epicentro en Pichilemu . 24horas.cl. Archived from the original on February 27, 2012. Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved March 15, 2010. @1@ 2Template: Webachiv / IABot / 24horas.cl
  4. ↑ Strong aftershocks shake Chile (March 11, 2010)
  5. ↑ El País: Three strong aftershocks shake Chile (March 11, 2010)  ( Page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.@1@ 2Template: Dead Link / www.elpais.com  
  6. ↑ NZZ: Strong aftershock hits Chile (March 11, 2010)
  7. ↑ Tsunami Bulletin Number 001 ( English ) Pacific Tsunami Warning Center. March 11, 2010. Retrieved March 29, 2010.
  8. ^ Three strong earthquakes strike Chile in quick succession ( English ) CNN . March 11, 2010. Retrieved March 29, 2010.
  9. ^ Americas - Chile president vows to rebuild . Al Jazeera English. March 5, 2010. Retrieved March 15, 2010.
  10. ^ New Chile quake as Pinera sworn in as president . BBC News. March 11, 2010. Retrieved March 15, 2010.
  11. ↑ a b D. Lange, Tilmann, F., Barrientos, SE, Contreras-Reyes, E., Methe, P., Moreno, M., Heit, B., Agurto, H., Bernard, P., Vilotte, J.-P., Beck, S .: Aftershock Seismicity of the 27 February 2010 Mw 8.8 Maule Earthquake Rupture zone . In: Earth and Planetary Science Letters . 317-183, January 2012, p. 17. doi : 10.1016 / j.epsl.2011.11.034 .
  12. ↑ Pichilemu devastado, ( Memento of the original from March 18, 2012 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Canal 13 (Chile) , March 16, 2010.  @1@ 2Template: Webachiv / IABot / tele13.13.cl
  13. ↑ Hombre fallece en Talca de un paro cardíaco en medio de fuertes réplicas ( Memento of the original from February 26, 2013 on WebCite ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. . ( Man dies of heart failure in Talca amid strong aftershock ) latercera.com, Chile  @1@ 2Template: Webachiv / IABot / www.latercera.com
  14. ↑ USGS list of earthquakes. ( Memento of the original from April 13, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. From March 12, 2010.  @1@ 2Template: Webachiv / IABot / earthquake.usgs.gov