The Microtremor Survey MethodSociety of Exploration Geophysicists with the cooperation of Society of Exploration Geophysicists of Japan [and] Australian Society of Exploration Geophysicists, 2003 - 135 halaman The earth is full of geophysical signals. Passive geophysical methods such as gravity, magnetic, and magnetotelluric surveys detect these signals. The microtremor survey method listens to the natural seismic signals from road traffic, machinery, ocean waves, and meteorological sources and analyzes for subsurface acoustic properties, in particular the shear-velocity profile for the earth at a scale of a few meters to a few kilometers. The required instrumentation is simple and can be applied where conventional seismic surveying is difficult, particularly in urban areas. This book describes the nature of the microtremor noise field, the use of appropriate surface arrays of geophones, and the two principal classes of array-processing techniques (high-resolution beamforming and the spatial autocorrelation method, or SPAC). Applications of the method exist in earthquake-hazard site zonation and in engineering seismic investigations. This is the first comprehensive textbook of the microtremor survey method written in English. The translation and publication from the original Japanese text have been a joint project of SEG, the SEG of Japan, and the Australian SEG. |
Isi
Principle of the microtremor survey method | 17 |
covariance function | 44 |
Estimating phase velocity and subsurface structure | 55 |
Hak Cipta | |
4 bagian lainnya tidak diperlihatkan
Edisi yang lain - Lihat semua
Istilah dan frasa umum
angular frequency application Asten average basement Bessel function Bouguer anomaly calculated Capon circular array component of microtremors CORRELATION covariance crotremor data acquisition data analysis data sets depth detect DISTANCE KM earthquake equation ESPAC estimating subsurface structure example f-k method f-k spectra FREQUENCY HZ frequency-wavenumber method geophysical Hiroshi Okada HKD and MIS Hokkaido University inversion large array layers Love waves matrix microtremor data microtremor method microtremor record microtremor survey method microtremors observed noise obtained Okada parameters phase velocity power spectra power spectral density rad/km radial and tangential radius Rayleigh waves S-wave velocity structure sample seismic methods seismometers semicircular array shows signal SPAC method spatial autocorrelation coefficient spatial autocorrelation function spatial autocorrelation method spectral density function spectral representation spectrum surface waves tangential components technique theory three-component Tokachi Plain variables variance variation vertical component wavenumber waves in microtremors