caa a22 4500 477047726 CHVBK 20180405111334.0 cr unu---uuuuu 170330e19960601xx s 000 0 eng 10.1007/BF00876440 doi (NATIONALLICENCE)springer-10.1007/BF00876440 Lateral variations of the local magnitude at Ebre station, Northeastern Iberian Peninsula [Elektronische Daten] [Josep Vila, Josep Batllo, Antoni Correig] Since 1984, a seismic surveillance at the Baix Ebre Region (NE of the Iberian Peninsula) has been carried out from a seismic network consisting of two digital and one analog stations. Large discrepancies between the recorded amplitudes and the magnitude estimates given by different agencies have been observed. To explain these discrepancies, that consist of a large reduction of amplitude and a strong dependence of the azimuth, a local magnitude formula for the area has been computed, using the analog records obtained at EBR short-period station. Global results show an average station correction factor between the computed local magnitude and the reported magnitude of the order of 1, presenting large variations around the mean value with a clear dependence on the azimuth. A detailed analysis of this variation around the mean value reveals that earthquakes can be classified according to their location in different geological units, thus obtaining for each zone a distinct station correction factor that can fluctuate as much as 0.6 around the average. These large lateral variations of the magnitude are in good agreement with previous studies of coda-Q attenuation. Birkhäuser Verlag, 1996 Local magnitude nationallicence lateral variations nationallicence station correction term nationallicence Vila Josep Department d'Astronomia i Meteorologia, Facultat de Fisica, Universitat de Barcelona, Martí i Franquès, 1, E-08028, Barcelona, Spain aut Batllo Josep Observatori de l'Ebre, CSIC, E-43520, Roquetes, Tarragona, Spain aut Correig Antoni Department d'Astronomia i Meteorologia, Facultat de Fisica, Universitat de Barcelona, Martí i Franquès, 1, E-08028, Barcelona, Spain aut pure and applied geophysics Birkhäuser-Verlag 147/1(1996-06-01), 131-146 0033-4553 147:1<131 1996 147 24 https://doi.org/10.1007/BF00876440 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00876440 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Vila Josep Department d'Astronomia i Meteorologia, Facultat de Fisica, Universitat de Barcelona, Martí i Franquès, 1, E-08028, Barcelona, Spain aut NATIONALLICENCE 700 1- Batllo Josep Observatori de l'Ebre, CSIC, E-43520, Roquetes, Tarragona, Spain aut NATIONALLICENCE 700 1- Correig Antoni Department d'Astronomia i Meteorologia, Facultat de Fisica, Universitat de Barcelona, Martí i Franquès, 1, E-08028, Barcelona, Spain aut NATIONALLICENCE 773 0- pure and applied geophysics Birkhäuser-Verlag 147/1(1996-06-01), 131-146 0033-4553 147:1<131 1996 147 24 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer