منابع مشابه
An Earth Model Based on Free Oscillations and Body Waves
Several recent inversion studies have clearly indicated the lack of resolving power of the normal mode data set and the possible trade-offs among the various parameters. These studies have also shown that the final model is as dependent on the starting model as on the data set. It is therefore important to incorporate body wave data into any inversion scheme not only to gain resolution but also...
متن کاملRecreating a heavenly chorus of plasma waves on Earth
s: NI2.00003 Excitation of chirping whistler waves in a laboratory plasma Session Session NI2: Waves and Instabilities 9:30 AM–12:30 PM, Wednesday, November 18, 2015 Room: Chatham Ballroom C
متن کاملAn Earth-flattening Transformation for Waves from a Point Source* by David P. Hill
An earth-flattening transformation is developed for wave-propagation problems that can be formulated in terms of uncoupled scalar Helmholtz equations. Through the transformation, wave problems in isotropic, spherically symmetric media with a specified radial heterogeneity can be expressed in terms of a flat geometry with a suitably vertical heterogeneity. The transformation is exact for homogen...
متن کاملRadiation Patterns of Seismic Surface Waves from Buried Dipolar Point Sources in a Flat Stratified Earth
Explicit compact expressions were obtained for the far displacement field of Rayleigh and Love waves generated by force configurations which served to simulate sheartype faults with arbitrary dip and slip. The medium transfer functions for dipolar sources were computed for a Gutenberg fiat continental earth model with 23 layers. These were then used to obtain universal radiation pattern charts ...
متن کاملWAVES REFLECTED AT THE " SURFACE " OF THE EARTH : P ' P ' P ' P ' By
Phases of the 600 km. deep earthquake of April 16, 1957, which have not been reflected at the earth's surface show very sharp beginnings arriving within the limits of error of a few seconds at the cMculated times. However, phases which have been reflected at the surface, for example PP, pP', pPP, have more or less emergent beginnings which arrive between a few seconds and as much as 30 seconds ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 1951
ISSN: 0028-0836,1476-4687
DOI: 10.1038/167788b0