HR: 08:05h
AN: S51C-01    [Abstracts]
TI: Mexican National Seismic Network: An overview, and its application to the seismic detection in the State of Guerrero, Mexico
AU: * Valdes-Gonzalez, C M
EM: carlosv@ollin.igeofcu.unam.mx
AF: Instituto de Geofisica, UNAM, Ciudad Universitaria, Mexico, Mex 04510, Mexico
AU: Jimenez, C
EM: casiano@ssn,unam.mx
AF: Instituto de Geofisica, UNAM, Ciudad Universitaria, Mexico, Mex 04510, Mexico
AU: Estrada, J
EM: jorge@ssn.unam.mx
AF: Instituto de Geofisica, UNAM, Ciudad Universitaria, Mexico, Mex 04510, Mexico
AU: Perez, J
EM: jesus@ssn.unam.mx
AF: Instituto de Geofisica, UNAM, Ciudad Universitaria, Mexico, Mex 04510, Mexico
AU: Cruz, J L
EM: joseluis@ssn.unam.mx
AF: Instituto de Geofisica, UNAM, Ciudad Universitaria, Mexico, Mex 04510, Mexico
AU: Cardenas, A
EM: arturo@ssn.unam.mx
AF: Instituto de Geofisica, UNAM, Ciudad Universitaria, Mexico, Mex 04510, Mexico
AU: Santiago, J
EM: joseantonio@ssn.unam.mx
AF: Instituto de Geofisica, UNAM, Ciudad Universitaria, Mexico, Mex 04510, Mexico
AB: The Mexican National Seismic Network (MNSN), has been increasing its coverage in Mexico. At the present we have about 30 broad-band seismic stations along the country, that transmit in real time its information to the National Mexican University (UNAM), in Mexico City, home of the MNSN. At the present we are finishing the installation of six stations in the Northern part of Mexico, a region poorly covered before. Guerrero, is one of the states with a major seismicity in the country. For this reason we have 4 broad-band seismic stations installed there, and two more near the borders of the state. This coverage has improved the hypocentral locations in Guerrero, allowing us look for paterns of seismicity distribution, in important regions such as the Guerrero Seismic Gap (GSG), a site where no large earthquake (> 7.5), has ocurred since 1911. A close look at the epicentral distribution in Guerrero, between 2005 and 2006, shows that 270 earthquakes with magnitudes greater than 4, are located principally between the Middle America Trench and the coast, and a smaller number of events is located along a section that parallels the coast at about 80-110 Km inland. If we plot the epicenters of earthquakes with magnitudes greater than 4.5, the number of events becomes 36, and a few of them are located, again along the inland sections that parallels the coast, and the others shows a pattern that borders, what can be consider the GSG. Although, with this information it is not possible to evaluate the state of the GSG, it is important to stablish the behavior of the seismicity before the ocurrance of an expected major earthquake.
UR: http:ssn.unam.mx
DE: 7223 Earthquake interaction, forecasting, and prediction (1217, 1242)
DE: 7230 Seismicity and tectonics (1207, 1217, 1240, 1242)
DE: 7240 Subduction zones (1207, 1219, 1240)
SC: Seismology [S]
MN: 2007 Joint Assembly