HR: 1340h
AN: S33A-1043    [Abstracts]
TI: Tomographic Mapping of Lg Propagation in Northern Europe
AU: * Boemler, M
EM: malene@gfy.ku.dk
AF: University of Copenhagen, Juliane Maries Vej 30, Copenhagen Oe, DK-2100, Denmark
AU: * Boemler, M
EM: malene@gfy.ku.dk
AF: Geological Survey of Denmark and Greenland-GEUS, Oester Voldgade 10, Copenhagen K, DK-1350, Denmark
AU: Gregersen, S
EM: sg@geus.dk
AF: Geological Survey of Denmark and Greenland-GEUS, Oester Voldgade 10, Copenhagen K, DK-1350, Denmark
AU: Mosegaard, K
EM: klaus@gfy.ku.dk
AF: University of Copenhagen, Juliane Maries Vej 30, Copenhagen Oe, DK-2100, Denmark
AB: How Important is the Tornquist Zone? We look at crustal differences across the geologically significant Tornquist zone. Recordings of regional earthquakes in Northern Europe have been collected in attempt to find the Lg-surface wave propagation. We classify the Lg-wave propagation paths according to weather the Lg wave propagation is good, intermediate or poor. We have included the available data from the period 1994-2004, accepting earthquakes with at least three amplitude measurements. With the relatively dense areal coverage provided by paths crossing the region it is possible to invert for the pattern of crustal heterogeneity which gives rise to the observed character of the Lg-wave propagation. We are using data from permanent seismic stations.
DE: 1219 Gravity anomalies and Earth structure (0920, 7205, 7240)
DE: 6982 Tomography and imaging (7270, 8180)
DE: 8180 Tomography (6982, 7270)
SC: Seismology [S]
MN: 2007 Fall Meeting