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DTIC ADA181567: Technical Report for the Period 1 January-31 March ...
by Defense Technical Information Center
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Results of the assessment of capabilities of seismic
networks and the design of networks show that a network's
location accuracy approaches a near-maximum when stations
are distributed over an azimuthal sector of about 180 deg
and that good depth determination requires stations
within about 15 deg of the focus of the event. The latter
suggests that global networks should include 100 or more
seismological stations if accurate depth estimation is
important. A study of about 100 local and regional events
detected by NORESS is a systematic effort to test
analytical methods being developed for extracting
features from seismic waveforms that can be used to
identify regional phases, and for recognizing repeated
events from a single source such as quarry blasts. The
methods under evaluation includes the extraction of
frequency-domain spectral parameters, and particle motion
information. Substantial effort was devoted to developing
concepts and preparing for experiments in international
exchange of of seismic waveform data. This work included
developing the technical concepts for a potential global
seismic monitoring system. The Center has been heavily
involved in an examination of its database management
system and the development of extensions to handle new
types of data-principally data from seismic arrays and
data anticipated from forthcoming GSE experiments.
Keywords: Nuclear explosion monitoring, Seismic wave
attenuation.
Date Published: 2018-02-14 17:49:57
Identifier: DTIC_ADA181567
Item Size: 58486480
Language: english
Media Type: texts
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