Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998geoji.135..893k&link_type=abstract
Geophysical Journal International, Volume 135, Issue 3, pp. 893-897.
Astronomy and Astrophysics
Astronomy
5
Finite Difference Method, Lateral Heterogeneity, Love Waves, Subduction, Synthetic Seismograms, Upper Mantle
Scientific paper
We calculate surface waves propagating in a laterally heterogeneous structure beneath the Kuril trench, where significant Love-wave polarization anomalies, called quasi-Love waves, are generated. Since 3-D wave propagation in the two-dimensionally heterogeneous structure can be assumed, we apply the 2.5-D finite difference method to the surface-wave calculations. The calculations show that a velocity contrast of 7 per cent at depths of less than 210 km beneath the Kuril trench cannot generate quasi-Love waves, and that an unlikely contrast of 20 per cent is required to generate clear quasi-Love waves. The possible cause of the quasi-Love waves inferred from previous studies on coupled free oscillations is a lateral variation in azimuthal anisotropy. The lateral variation in azimuthal anisotropy beneath the Kuril trench suggests a change in the mantle flow induced by the subducting slab.
No associations
LandOfFree
Polarization anomaly of Love waves caused by lateral heterogeneity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Polarization anomaly of Love waves caused by lateral heterogeneity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polarization anomaly of Love waves caused by lateral heterogeneity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1292020