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T-Phase Observations from the May 1999 Ascension Island Experiment.

DE200515013205

Publication Date	2000
Personal Author	Rodgers, A.; Harben, P.
Page Count	16
Abstract	The Comprehensive Nuclear-Test-Ban Treaty (CTBT) specifies that an International Monitoring System (IMS) will be used to detect and locate disturbances that could be related to nuclear testing. In order to monitor disturbances in and near the world's oceans, the IMS will rely on a network of 11 hydroacoustic stations. This hydroacoustic network will be composed of 6 hydrophone stations and 5 T-phase seismic stations. The hydrophone stations will record pressure variations in the ocean. The T-phase stations will record the seismic waves in the solid earth that are excited when an hydroacoustic wave strikes an island or continental margin. The coupling of hydroacoustic-to-seismic energy for the purpose of CTBT monitoring is currently an active area of research. We report observations of hydroacoustic waves and their conversion to seismic waves (T-waves) at the volcanic edifice of Ascension Island.
Keywords	Seismic waves Hydroacoustics Seismic detection Underwater acoustics Seismic data Oceans Monitoring Earthquakes Seismic propagation Seismological stations Ascension Island Comprehensive Nuclear-Test-Ban Treaty(CTBT)
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200525

T-Phase Observations from the May 1999 Ascension Island Experiment.

T-Phase Observations from the May 1999 Ascension Island Experiment.
DE200515013205

Publication Date	2000
Personal Author	Rodgers, A.; Harben, P.
Page Count	16
Abstract	The Comprehensive Nuclear-Test-Ban Treaty (CTBT) specifies that an International Monitoring System (IMS) will be used to detect and locate disturbances that could be related to nuclear testing. In order to monitor disturbances in and near the world's oceans, the IMS will rely on a network of 11 hydroacoustic stations. This hydroacoustic network will be composed of 6 hydrophone stations and 5 T-phase seismic stations. The hydrophone stations will record pressure variations in the ocean. The T-phase stations will record the seismic waves in the solid earth that are excited when an hydroacoustic wave strikes an island or continental margin. The coupling of hydroacoustic-to-seismic energy for the purpose of CTBT monitoring is currently an active area of research. We report observations of hydroacoustic waves and their conversion to seismic waves (T-waves) at the volcanic edifice of Ascension Island.
Keywords	Seismic waves Hydroacoustics Seismic detection Underwater acoustics Seismic data Oceans Monitoring Earthquakes Seismic propagation Seismological stations Ascension Island Comprehensive Nuclear-Test-Ban Treaty(CTBT)
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200525