Calibration of Local Magnitude Scales for Use in Seismic Monitoring.

In situations where cavity decoupling of underground nuclear explosions is a plausible evasion scenario, comprehensive seismic monitoring of any eventual CTBT will require the routine identification of many small seismic events with magnitudes in the range 2.0 < m sub b < 3.5. However, since s...

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Bibliographic Details
Main Authors: Murphy, J. R., Marshall, M. E., Barker, B. W., Bennett, T. J., Grant, L. T.
Other Authors: S-CUBED LA JOLLA CA
Format: Text
Language:English
Published: 1995
Subjects:
Seismic Detection and Detectors
Nuclear Weapons
Government and Political Science
*SEISMIC DETECTION
*NUCLEAR EXPLOSION DETECTION
*SEISMIC ARRAYS
NUCLEAR EXPLOSIONS
YIELD(NUCLEAR EXPLOSIONS)
POSITION(LOCATION)
UNDERGROUND EXPLOSIONS
CAVITIES
NUCLEAR EXPLOSION TESTING
SEISMIC DATA
DECOUPLING
SEISMIC WAVES
ARMS CONTROL
RECORDING SYSTEMS
CALIBRATION
SEISMIC DISCRIMINATION
TREATIES
SEISMOLOGICAL STATIONS
TELESEISMIC WAVES
NOVAYA ZEMLYA
NORESS(NORWEGIAN EXPERIMENTAL SMALL SUBARRAY)
ARCESS(ARCTIC EXPERIMENTAL SMALL SUBARRAY)
COMPREHENSIVE TEST BAN TREATY
GERESS(GERMAN EXPERIMENTAL SMALL SUBARRAY)
FINESA(FINNISH EXPERIMENTAL SEISMIC ARRAY)
PE61102F
WUPL2309G2BL
Arctic
Novaya Zemlya
Online Access:http://www.dtic.mil/docs/citations/ADA304034
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA304034
Description
Summary:In situations where cavity decoupling of underground nuclear explosions is a plausible evasion scenario, comprehensive seismic monitoring of any eventual CTBT will require the routine identification of many small seismic events with magnitudes in the range 2.0 < m sub b < 3.5. However, since such events are not expected to be detected teleseismically, their magnitudes will have to be estimated from regional recordings using seismic phases and frequency bands which are different from those employed in the teleseismic m sub b scale which is generally used to specify monitoring capability. Therefore, it is necessary to establish the m sub b equivalences of any selected regional magnitude measures in order to estimate the expected detection statistics and thresholds of proposed CTBT seismic monitoring networks. In the investigations summarized in this report, this has been accomplished through analyses of synthetic data obtained by theoretically scaling observed regional seismic data recorded in Scandinavia and Central Asia from various tamped nuclear tests to obtain estimates of the corresponding seismic signals to be expected from small cavity decoupled nuclear tests at those same source locations. (MM)

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