Anomalously strong observations of PKiKP /PcP amplitude ratios on a global scale
نویسندگان
چکیده
منابع مشابه
a generalization of strong causality
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S U M M A R Y The density jump ( ρ ICB) at the inner core boundary (ICB) is an important constraint on the dynamics and history of the Earth’s core. Two types of seismological data sensitive to ρ ICB have been studied since the 1970s: free oscillation eigenfrequencies and the amplitudes of core reflected phases (PKiKP/PcP). The preliminary reference earth model (PREM) of Dziewonski & Anderson, ...
متن کاملInner core attenuation anisotropy
We investigate the attenuation structure of the Earth's inner core and its relationship to the velocity structure globally and along various sampling directions, by studying the amplitude ratios and the differential travel times of the PKiKP–PKIKP and PKPbc– PKIKP phases. Our observations reveal that the amplitude ratios of these core phases, like the differential travel times, vary in both sam...
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* Corresponding author. ** This research was performed in the framework of the EC project GEO-BENE (www.geo-bene.eu), led by IIASA. Abstract – Earthquakes on global scale cause considerable losses both in terms of economic impact and human lives. A proper coordination of disaster response activities requires observation of affected areas for evaluation of spatial distribution of damage. We use ...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Solid Earth
سال: 2015
ISSN: 2169-9313
DOI: 10.1002/2015jb012038