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Title

Analysis of the Seismicity Associated to the Subduction of the Rivera Plate using OBS and Onland Stations

AuthorsNuñez-Cornu, Francisco; Córdoba, Diego ; Dañobeitia, Juan José ; Bandy, William; Zamora-Camacho, Araceli; Marquez-Ramirez, Victor Hugo; Ambrós, M. ; Gómez, Adan; Sandoval, Juan Manuel; Mortera-Gutierrez, Carlos
Issue Date14-Dec-2016
PublisherAmerican Geophysical Union
Citation2016 AGU Fall Meeting (2016)
AbstractThe second stage of TsuJal Project includes the study of passive seismic activity in the region of the plate Rivera and Jalisco block by anchoring OBS and densifying the network of seismic stations on land for at least four months. This stage began in April 2016 with the deployment of 25 Obsidian stations with sensor Le-3D MkIII from the northern part of Nayarit state to the south of Colima state, including the Marias Islands. This temporal seismic network complements the Jalisco Seismic Network (RESAJ) for a total of 50 stations. Offshore, ten OBS type LCHEAPO 2000 with 4 channel (3 seismic short period and 1 pressure) were deployed, in the period from 19 to 30 April 2016 using the BO El Puma from UNAM. The OBS were deployed in an array from the Marias Islands to offcoast of the border of Colima and Michoacan states. On May 4, an earthquake with Ml = 4.2 took place in the contact area of the Rivera Plate, Cocos Plate and the Middle America Trench, subsequently occurred a seismic swarm with over 200 earthquakes until May 16, including an earthquake with Ml = 5.0 on May 7. A second swarm took place between May 28 and Jun 4 including an earthquake with Ml = 4.8 on Jun 1. An analysis of the quality of different location methods is presented: automatic preliminary RESAJ location using Antelope; location with revised RESAJ phases in Antelope; relocation of RESAJ data with hypo and a regional velocity model; relocation of RESAJ data with hypo adding data from the temporal seismic network stations; and finally the relocation adding the data from the OBS network. Moreover, the tectonic implications of these earthquakes are discussed
DescriptionAmerican Geophysical Union Fall Meeting, 12-16 December 2016, San Francisco
Publisher version (URL)https://agu.confex.com/agu/fm16/meetingapp.cgi/Paper/124306
URIhttp://hdl.handle.net/10261/170477
Appears in Collections:(UTM) Comunicaciones congresos
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