Seismicity and codaQ values in the eastern Pyrenees: First results from the La Cerdanya seismic network |
| |
| Authors: | Antoni M Correig Brian J Mitchell Ramon Ortiz |
| |
| Institution: | (1) Laboratori d'Estudis Geofisics  Eduard Fontseré, Institut d'Estudis Catalans, Facultat de Fisica, Marti Franques s/n, 08028 Barcelona, Spain;(2) Department of Earth and Atmospheric Sciences, Saint Louis University, Laclede Station, PO Box 8099, 63156 Saint Louis, MO, USA;(3) Department de Geologia Dinamica, Geofisica i Paleontologia, Facultat de Fisica, Universitat de Barcelona, Marti Franques s/n, 08028 Barcelona, Spain;(4) Museo Nacional de Ciencias Naturales, CSIC, Departamento de Geologia, José Gutierrez Abascal 2, 28006 Madrid, Spain |
| |
| Abstract: | Seismicity in the La Cerdanya region of the eastern Pyrenees has been accurately mapped for the first time using data from a local seismic network. The majority of earthquakes lies on or near the La Cerdanya fault or secondary faults to the south. Coda magnitudes determined for these earthquakes, using magnitude relations from other regions, range between –0.5 and 2.2. These are, however, presumed to be underdetermined values sinceQ values appear to be very low in the La Cerdanya region. CodaQ values at a frequency of 1.5 Hz range between 17 and 120, the lowest values being obtained for the most seismically active regions. CodaQ values also increase with increasing distance, a result which indicates decreasing seismic attenuation with increasing depth in the crust. |
| |
| Keywords: | Seismicity codaQ Q variations |
| 本文献已被 SpringerLink 等数据库收录！ |
|
