INFERENCES ON THE GEOMETRY OF THE NAZCA PLATE IN NORTHWESTERN PERÚ BASED ON DATA COLLECTED BY A LOCAL SEISMOGRAPH NETWORK
In Central and Southern Peru, local and teleseismic data allow having insights on the Wadati-Benioff zone (WBZ) geometry. In the region of Northern Perú, only rough estimates of the WBZ geometry have beenproposed, and were obtained using teleseismic data due to the reduce...
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| Format: | Article |
| Language: | English |
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Universidad Nacional de Colombia
2006-08-01
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| Series: | Earth Sciences Research Journal |
| Online Access: | http://www.revistas.unal.edu.co/index.php/esrj/article/view/21222 |
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| author | Tavera Hernando Vilca Renzo Marín Gloria |
| author_facet | Tavera Hernando Vilca Renzo Marín Gloria |
| author_sort | Tavera Hernando |
| collection | DOAJ |
| description | In Central and Southern Peru, local and teleseismic data allow having insights on the Wadati-Benioff zone (WBZ) geometry. In the region of Northern Perú, only rough estimates of the WBZ geometry have beenproposed, and were obtained using teleseismic data due to the reduced number of mb≥4.0-magnitude earthquakes available. The installation of a local seismic network in the NW border of Northern Perú, allowedthe recording of a large number of earthquakes with magnitudes ranging from 1.8 to 4.1 ML, and maximum depths of 120 km., distributed over the area where the occurrence of earthquakes with magnitudes > 4.0 isscarce. In a vertical section, oriented N70˚E earthquakes are distributed along a 10° dipping plane from the trench. Landwards from the coastline, the dip angle increases to 28°. These results allow a high resolutiondefinition of the Nazca plate geometry in NW Perú. Focal mechanisms computed for 22 earthquakes located between 50 and 120 km depth beneath the network suggest the development of deformation processes in direction parallel to the convergence Nazca plate direction. |
| format | Article |
| id | doaj-art-58c3e5d3a6434b1e93c014d79305e014 |
| institution | Kabale University |
| issn | 1794-6190 |
| language | English |
| publishDate | 2006-08-01 |
| publisher | Universidad Nacional de Colombia |
| record_format | Article |
| series | Earth Sciences Research Journal |
| spelling | doaj-art-58c3e5d3a6434b1e93c014d79305e0142025-08-20T03:53:38ZengUniversidad Nacional de ColombiaEarth Sciences Research Journal1794-61902006-08-011011524INFERENCES ON THE GEOMETRY OF THE NAZCA PLATE IN NORTHWESTERN PERÚ BASED ON DATA COLLECTED BY A LOCAL SEISMOGRAPH NETWORKTavera HernandoVilca RenzoMarín GloriaIn Central and Southern Peru, local and teleseismic data allow having insights on the Wadati-Benioff zone (WBZ) geometry. In the region of Northern Perú, only rough estimates of the WBZ geometry have beenproposed, and were obtained using teleseismic data due to the reduced number of mb≥4.0-magnitude earthquakes available. The installation of a local seismic network in the NW border of Northern Perú, allowedthe recording of a large number of earthquakes with magnitudes ranging from 1.8 to 4.1 ML, and maximum depths of 120 km., distributed over the area where the occurrence of earthquakes with magnitudes > 4.0 isscarce. In a vertical section, oriented N70˚E earthquakes are distributed along a 10° dipping plane from the trench. Landwards from the coastline, the dip angle increases to 28°. These results allow a high resolutiondefinition of the Nazca plate geometry in NW Perú. Focal mechanisms computed for 22 earthquakes located between 50 and 120 km depth beneath the network suggest the development of deformation processes in direction parallel to the convergence Nazca plate direction.http://www.revistas.unal.edu.co/index.php/esrj/article/view/21222 |
| spellingShingle | Tavera Hernando Vilca Renzo Marín Gloria INFERENCES ON THE GEOMETRY OF THE NAZCA PLATE IN NORTHWESTERN PERÚ BASED ON DATA COLLECTED BY A LOCAL SEISMOGRAPH NETWORK Earth Sciences Research Journal |
| title | INFERENCES ON THE GEOMETRY OF THE NAZCA PLATE IN NORTHWESTERN PERÚ BASED ON DATA COLLECTED BY A LOCAL SEISMOGRAPH NETWORK |
| title_full | INFERENCES ON THE GEOMETRY OF THE NAZCA PLATE IN NORTHWESTERN PERÚ BASED ON DATA COLLECTED BY A LOCAL SEISMOGRAPH NETWORK |
| title_fullStr | INFERENCES ON THE GEOMETRY OF THE NAZCA PLATE IN NORTHWESTERN PERÚ BASED ON DATA COLLECTED BY A LOCAL SEISMOGRAPH NETWORK |
| title_full_unstemmed | INFERENCES ON THE GEOMETRY OF THE NAZCA PLATE IN NORTHWESTERN PERÚ BASED ON DATA COLLECTED BY A LOCAL SEISMOGRAPH NETWORK |
| title_short | INFERENCES ON THE GEOMETRY OF THE NAZCA PLATE IN NORTHWESTERN PERÚ BASED ON DATA COLLECTED BY A LOCAL SEISMOGRAPH NETWORK |
| title_sort | inferences on the geometry of the nazca plate in northwestern peru based on data collected by a local seismograph network |
| url | http://www.revistas.unal.edu.co/index.php/esrj/article/view/21222 |
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