Observations of the mid-mantle discontinuity beneath
Indonesia from S to P converted waveforms
E. Vanacore, F.-L. Niu, and H. Kawakatsu
Geophysi. Res. Lett., , in press, 2006.
Abstract
S to P conversions were employed to derive a
coherent discontinuity structure beneath Indonesia. Analysis of
data recorded by three regional arrays from nine deep
earthquakes not only confirmed the results of previous studies
on the existence of the mid-mantle discontinuity beneath the
Java arc but also revealed its presence north to Kalimantan
Island. S to P waves converted at the discontinuity at ~1000 km
(S¡Ç1000¡ÇP) were observed on the stacked diagrams with a
negative slowness relative to the P wave and a conversion
depth ranging from ~1080 km in the west to ~930 km in the
east.