HR: 0830h
AN: V51J-0408    [PDF]
TI: CALIPSO Borehole Instrumentation Project at Soufriere Hills Volcano, Montserrat, BWI: Data Acquisition, Telemetry, Integration, and Archival Systems
AU: * Mattioli, G S
EM: mattioli@uark.edu
AF: University of Arkansas, Dept. of Geosciences 113 Ozark Hall, Fayetteville, AR 72701
AU: Linde, A T
EM: alinde@dtm.ciw.edu
AF: Carnegie Institution Washington, Dept. of Terrestrial Magnetism 5241 Broad Branch Rd., NW, Washington, DC 20015
AU: Sacks, I S
EM: sacks@dtm.ciw.edu
AF: Carnegie Institution Washington, Dept. of Terrestrial Magnetism 5241 Broad Branch Rd., NW, Washington, DC 20015
AU: Malin, P E
EM: malin@duke.edu
AF: Duke University, Div. of Earth & Ocean Sciences Old Chemistry Bldg., Durham, NC 27708
AU: Shalev, E
EM: shalev@duke.edu
AF: Duke University, Div. of Earth & Ocean Sciences Old Chemistry Bldg., Durham, NC 27708
AU: Elsworth, D
EM: elsworth@psu.edu
AF: Pennsylvania State University, Dept. of Geosciences 503 Deike Bldg., University Park, PA 16802
AU: Hidayat, D
EM: hidayat@geosc.psu.edu
AF: Pennsylvania State University, Dept. of Geosciences 503 Deike Bldg., University Park, PA 16802
AU: Voight, B
EM: voight@ems.psu.edu
AF: Pennsylvania State University, Dept. of Geosciences 503 Deike Bldg., University Park, PA 16802
AU: Young, S R
EM: sy@caribsurf.com
AF: Pennsylvania State University, Dept. of Geosciences 503 Deike Bldg., University Park, PA 16802
AU: Dunkley, P N
AF: Montserrat Volcano Observatory, Upper Fleming Road, Fleming, 00000 Montserrat
AU: Herd, R
EM: richard@mvo.ms
AF: Montserrat Volcano Observatory, Upper Fleming Road, Fleming, 00000 Montserrat
AU: Norton, G
AF: Montserrat Volcano Observatory, Upper Fleming Road, Fleming, 00000 Montserrat
AB: The {\bf CALIPSO} Project (Caribbean Andesite Lava Island-volcano Precision Seismo-geodetic Observatory) has greatly enhanced the monitoring and scientific infrastructure at the Soufriere Hills Volcano, Montserrat with the recent installation of an integrated array of borehole and surface geophysical instrumentation at four sites. Each site was designed to be sufficiently hardened to withstand extreme meteorological events (e.g. hurricanes) and only require minimum routine maintenance over an expected observatory lifespan of $>$30 y. The sensor package at each site includes: a single-component, very broad band, Sacks-Evertson strainmeter, a three-component seismometer ($\sim$Hz to 1 kHz), a Pinnacle Technologies series 5000 tiltmeter, and a surface Ashtech u-Z CGPS station with choke ring antenna, {\bf SCIGN} mount and radome. This instrument package is similar to that envisioned by the Plate Boundary Observatory for deployment on EarthScope target volcanoes in western North America and thus the {\bf CALIPSO} Project may be considered a prototype {\bf PBO} installation with real field testing on a very active and dangerous volcano. Borehole sites were installed in series and data acquisition began immediately after the sensors were grouted into position at 200 m depth, with the first completed at Trants (5.8 km from dome) in 12-02, then Air Studios (5.2 km), Geralds (9.4 km), and Olveston (7.0 km) in 3-03. Analog data from the strainmeter (50 Hz sync) and seismometer (200 Hz) were initially digitized and locally archived using RefTek 72A-07 data acquisition systems (DAS) on loan from the PASSCAL instrument pool. Data were downloaded manually to a laptop approximately every month from initial installation until August 2003, when new systems were installed. Approximately 0.2 Tb of raw data in SEGY format have already been acquired and are currently archived at UARK for analysis by the CALIPSO science team. The July 12th dome collapse and vulcanian explosion events were recorded at 3 of the 4 sites. Steel reinforced, poured concrete crypts were constructed to house the surface instruments, data acquisition, telemetry components, and backup battery array with sufficient power to last 10 d without recharging. The central, cross-braced column of the crypt also functions as the monument for the CGPS antenna, which is coupled to a bedrock-grouted 1.5" steel pipe using a precision {\bf SCIGN} level. In August 2003, the original temporary DAS were replaced with Quanterra Q330 six channel 24 bit systems equipped with PB14 digital packet balers, which can locally buffer up to 20 Gb of strain and seismic data in MSEED packets. All instruments are linked together via a cat 5 IP LAN and data are telemetered from each remote using a single FreeWave FGR-115RE ethernet radio bridge, and where necessary repeater, to the Montserrat Volcano Observatory. Here they are cached prior to transmission via a VPN to UARK for final archival. Detailed schematics and a photo archive are available online.
UR: http://comp.uark.edu/~mattioli/research/CALIPSO/Intro.html.
DE: 0915 Downhole methods
DE: 1709 Geodesy
DE: 1749 Volcanology, geochemistry, and petrology
DE: 1794 Instruments and techniques
DE: 7280 Volcano seismology (8419)
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2003 Fall Meeting