Exploitation of Seismograph NetworksCompte-rendus de NATO Advanced Study Institute tenu à Sandefjord, Norway du 22 avr. - 3 mai 1974, sous les auspices de Cransfield Institute NATO Advanced Study Institute on the Exploitation of Seismograph Networks, Sandefjord, Norway, 1974. |
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amplitude analysis ARPA ARPA network ARPANET array data arrival astr average azimuth beam beamforming calculated channels Christoffersson coherent complexity component Computed seismogram computer network correlation cross-correlation crustal depth detector discriminants distance earth earthquakes effects epicentral equation error estimate event detection explosions and earthquakes filter Fourier frequency function Geophys given Husebye incoherent beamforming input LASA layers magnetic tape magnitude matrix measurements method noise NORSAR observed obtained operation output P-wave packet packet switching parameters phases plot processing Processor programs pulse quantisation random Rayleigh wave recorded region Ringdal sample Seism seismic array seismic events seismic signals seismograms seismological seismometer sensors short period shown in Figure slowness source crust spectral spectrum structure Subroutine surface waves switching tape techniques terminal threshold tion transform travel-time upper mantle values vector velocity wavenumber Yellowknife