A systematic search for mantle discontinuities using SS-precursors
نویسندگان
چکیده
منابع مشابه
Do double ‘SS precursors’ mean double discontinuities?
S U M M A R Y Stacks of SS precursors have been widely used in the past two decades to investigate the existence and characteristics of upper mantle discontinuities on a global scale as well as in several regional cases. Here, we present observations of SS precursors from an Mb 6.7 earthquake recorded at the US Transportable Array in 2010. In this particular case, the S660S precursors on the tr...
متن کامل33 Do ” double SS precursors ” mean double discontinuities ?
SS precursors are the underside reflections from the upper mantle discontinuities such as those at 410 and 660 km. They are important tools for studying the existence and characteristics of mantle discontinuities both on the global and regional scales (see Deuss, 2009 for a review). Due to their sensitivity at the midpoint between source and receiver, coverage for oceanic regions is achieved wh...
متن کاملInvestigation of upper mantle discontinuity structure beneath the central Pacific using SS precursors
Figures S1-S9 show topologies for stacking parameters not explored in Figure 14 of the manuscript, and may be of interest to the reader. These additional plots demonstrate the agreement between topologies across the different stacking parameters, such as the corner frequency of the low-pass filter, correction models, and SNR value. The stacking geometry in all the supplemental plots is 80 10-de...
متن کاملMantle discontinuities beneath Southern Africa
[1] Seismic velocity discontinuities within the top 1000 km of the Earth beneath southern Africa are imaged by stacking about 1300 source-normalized broadband seismograms recorded by the Southern African Seismic Experiment. The Moho, 410, and 660 kilometer discontinuities are clearly detected. The mean mantle transition zone thickness is 245 km, essentially the same as the global average, sugge...
متن کاملImaging mantle discontinuities using multiply-reflected P-to-S conversions
a r t i c l e i n f o a b s t r a c t Improving the reliability and accuracy in the determination of the depth to velocity discontinuities in the Earth's mantle is essential for a better understanding of mantle dynamics, as well as for addressing such fundamental questions as the origin of mantle plumes and fate of subducted slabs. Most existing techniques that utilize receiver function stackin...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2002
ISSN: 0094-8276
DOI: 10.1029/2002gl014768