HR: 16:40h
AN: S24B-03    [Abstracts]
TI: A Kinematic and Dynamic Investigation of Early Magnitude Estimation
AU: * Murphy, S
EM: shane.murphy@na.infn.it
AF: Universita di Napoli Federico II, Via Diocleziano, 328, Napoli, NA 80124, Italy
AU: Nielsen, S
EM: nielsen@ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata, 605, Roma, RM 00143, Italy
AB: Recent seismological analysis has shown a general scaling between final magnitude and the averaged first few seconds of ground motion recorded by seismic arrays. One possible explanation for this scaling is that an earthquake's final size is somehow related to it's initiation. Another possible hypothesis is that the initial recorded ground motion relates to a substantial section of the overall fault size. By using simple dynamic and kinematic models we investigate both theories. Our dynamic models show that scaling is valid only over a narrow magnitude range for a particular class of rupture. Simple kinematic models on the other hand provide a more fruitful result whereby scaling between magnitude and a simplified peak ground displacement is similar to that observed in real data.
DE: 7200 SEISMOLOGY
DE: 7209 Earthquake dynamics (1242)
DE: 7212 Earthquake ground motions and engineering seismology
DE: 7215 Earthquake source observations (1240)
DE: 7290 Computational seismology
SC: Seismology [S]
MN: 2007 Fall Meeting