Southern Perú coseismic subsidence: 23 June 2001 8.4-Mw earthquake
The 23-June-2001 8.4-Mw magnitude earthquake partially filled the 1868-seismic-gap in southern Perú. This earthquake produced a thrust faulting dislocation with a rupture that started at about ~200 km SE from the 1996's Nazca earthquake epicenter, and stopped near Ilo, at about 300 km from...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2008-01-01
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| Series: | Advances in Geosciences |
| Online Access: | http://www.adv-geosci.net/14/79/2008/adgeo-14-79-2008.pdf |
| _version_ | 1818262396284698624 |
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| author | L. Ocola |
| author_facet | L. Ocola |
| author_sort | L. Ocola |
| collection | DOAJ |
| description | The 23-June-2001 8.4-Mw magnitude earthquake partially filled the 1868-seismic-gap in southern Perú. This earthquake produced a thrust faulting dislocation with a rupture that started at about ~200 km SE from the 1996's Nazca earthquake epicenter, and stopped near Ilo, at about 300 km from the epicenter, near a positive gravity anomaly offshore Ilo. The 23-June-2001-earthquake dislocation zone is under the Arequipa sedimentary Basin. Pre- and post-seismic GPS measurements at Camaná and Ilo at SIRGAS-GPS points (SIRGAS: Sistema de Referencia Geocéntrico para América del Sur) and the average sea level pre- and post-seismic event at Mollendo tide gauge provide evidence of a regional subsidence of southern Perú, with 84 cm at Camaná, 16 cm at Ilo, and 15 cm at Mollendo. Field surveys post earthquake document significant subsidence in Camaná resort beaches. Results of a simple dislocation modelling of 23-June-2001 earthquake agree reasonably well with the observed data. However, the coseismic subsidence of southern Perú is at variance with the regional uplift of southern Perú based on Neotectonic studies. This fact, suggests that, in recent geological times, the magnitude of the secular uplift due to tectonic plate converge has been larger than the coseismic deformation recovery. |
| first_indexed | 2024-12-12T19:02:27Z |
| format | Article |
| id | doaj.art-0fa6fbdd82db400aa9c3195301863f07 |
| institution | Directory Open Access Journal |
| issn | 1680-7340 1680-7359 |
| language | English |
| last_indexed | 2024-12-12T19:02:27Z |
| publishDate | 2008-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Advances in Geosciences |
| spelling | doaj.art-0fa6fbdd82db400aa9c3195301863f072022-12-22T00:15:03ZengCopernicus PublicationsAdvances in Geosciences1680-73401680-73592008-01-01147983Southern Perú coseismic subsidence: 23 June 2001 8.4-Mw earthquakeL. OcolaThe 23-June-2001 8.4-Mw magnitude earthquake partially filled the 1868-seismic-gap in southern Perú. This earthquake produced a thrust faulting dislocation with a rupture that started at about ~200 km SE from the 1996's Nazca earthquake epicenter, and stopped near Ilo, at about 300 km from the epicenter, near a positive gravity anomaly offshore Ilo. The 23-June-2001-earthquake dislocation zone is under the Arequipa sedimentary Basin. Pre- and post-seismic GPS measurements at Camaná and Ilo at SIRGAS-GPS points (SIRGAS: Sistema de Referencia Geocéntrico para América del Sur) and the average sea level pre- and post-seismic event at Mollendo tide gauge provide evidence of a regional subsidence of southern Perú, with 84 cm at Camaná, 16 cm at Ilo, and 15 cm at Mollendo. Field surveys post earthquake document significant subsidence in Camaná resort beaches. Results of a simple dislocation modelling of 23-June-2001 earthquake agree reasonably well with the observed data. However, the coseismic subsidence of southern Perú is at variance with the regional uplift of southern Perú based on Neotectonic studies. This fact, suggests that, in recent geological times, the magnitude of the secular uplift due to tectonic plate converge has been larger than the coseismic deformation recovery.http://www.adv-geosci.net/14/79/2008/adgeo-14-79-2008.pdf |
| spellingShingle | L. Ocola Southern Perú coseismic subsidence: 23 June 2001 8.4-Mw earthquake Advances in Geosciences |
| title | Southern Perú coseismic subsidence: 23 June 2001 8.4-Mw earthquake |
| title_full | Southern Perú coseismic subsidence: 23 June 2001 8.4-Mw earthquake |
| title_fullStr | Southern Perú coseismic subsidence: 23 June 2001 8.4-Mw earthquake |
| title_full_unstemmed | Southern Perú coseismic subsidence: 23 June 2001 8.4-Mw earthquake |
| title_short | Southern Perú coseismic subsidence: 23 June 2001 8.4-Mw earthquake |
| title_sort | southern peru coseismic subsidence 23 june 2001 8 4 mw earthquake |
| url | http://www.adv-geosci.net/14/79/2008/adgeo-14-79-2008.pdf |
| work_keys_str_mv | AT locola southernperucoseismicsubsidence23june200184mwearthquake |