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The observed seismogram
The shape of the farfleld displacement pulse
Determination of source parameters
3 other sections not shown
21 July absorption Aleutian Amchitka amplitude ratio Barazangi and Isacks Benioff zone Blandford 1971 Boxcar Brune's Cannikin cavity corner frequency deep earthquakes depth of burial determined Dirac impulse dyne-cm Earth Planet earth's mantle events discussed events studied exhibit farfield displacement pulse Frasier galvonometer Geophys high-frequency impulse response instrument response island arc J. R. Astr Johnson and McEvilly large number magnitude range Milrow Mueller and Murphy multiple events NORSAR obtained P-wave pP-P pulse form pulse-time ramp ray path recorded at VUN region Seggern and Blandford Seism seismic waves seismogram recorded seismograph system seismometer shallow-focus earthquakes short-period shown in Fig signals sixty similar source dimensions source duration source function source model source parameters spectral stations stress drop synthetic seismograms third half-cycle tion Transverse Ranges triangular pulse underground nuclear explosions upper mantle value for Q values of Q variation velocity waveforms Wayne David Wyss and Molnar yield z-transform