caa a22 4500 477047963 CHVBK 20180405111335.0 cr unu---uuuuu 170330e19961001xx s 000 0 eng 10.1007/BF01089695 doi (NATIONALLICENCE)springer-10.1007/BF01089695 Spectral analysis and earthquake scaling of the Petatlan earthquake ( M s =7.6) aftershocks, recorded at stations along the pacific coast and between the coast and Mexico City [Elektronische Daten] [Carlos Valdés-González, Robert Meyer] Spectral parameters have been estimated for 214 Petatlan aftershocks recorded at stations between Petatlan and Mexico City and between Petatlan and Acapulco. The spectral parameters were used to obtain empirical relations for the estimation of seismic moment from coda length and fromM L . Stress drops, using Brune's model, were calculated for these aftershocks. Six events with large stress drop are located within a previously suggested asperity, and seven more suggest a boundary zone at the intersection of the Petatlan and Zihuatanejo aftershock rupture volumes. Stress drops increase with increasing seismic moment up to 1020 dyne-cm but appear to be constant at greater moment values. The peak horizontal velocity times distance of aftershocks recorded near the coast and between the coast and Mexico City (30 to 270 km away), scales linearly with seismic moment, and predicts well the peak horizontal values of large (M s ≥7.0) coastal thrust events recorded on rock sites at Mexico City. Peak horizontal velocity is a straightforward measurement, thus this relation allows us to evaluate expected ground motion between the Pacific coast and Mexico City from the seismic moment of subduction related earthquakes along the coast. Birkhäuser Verlag, 1996 Aftershocks nationallicence seismic moment nationallicence stress drop and source radius nationallicence Valdés-González Carlos Instituto de Geofisica, UNAM, C.P. 04510, México D.F. aut Meyer Robert Department of Geology and Geophysics, University of Wisconsin, 53706, Madison, U.S.A. aut pure and applied geophysics Birkhäuser-Verlag 147/4(1996-10-01), 631-656 0033-4553 147:4<631 1996 147 24 https://doi.org/10.1007/BF01089695 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01089695 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Valdés-González Carlos Instituto de Geofisica, UNAM, C.P. 04510, México D.F aut NATIONALLICENCE 700 1- Meyer Robert Department of Geology and Geophysics, University of Wisconsin, 53706, Madison, U.S.A aut NATIONALLICENCE 773 0- pure and applied geophysics Birkhäuser-Verlag 147/4(1996-10-01), 631-656 0033-4553 147:4<631 1996 147 24 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer