HR: 1340h
AN: G33A-0911    [Abstracts]
TI: The EarthScope Plate Boundary Observatory Akutan Alaskan Volcano Tiltmeter Installation
AU: * Pauk, B A
EM: pauk@unavco.org
AF: UNAVCO, Inc., 6350 Nautilus Drive, Boulder, CO 80301,
AU: Gallaher, W
EM: gallaher@unavco.org
AF: UNAVCO, Inc., 6350 Nautilus Drive, Boulder, CO 80301,
AU: Dittmann, T
EM: dittmann@unavco.org
AF: UNAVCO, Inc., 6350 Nautilus Drive, Boulder, CO 80301,
AU: Smith, S
EM: sms@unavco.org
AF: UNAVCO, Inc., 6350 Nautilus Drive, Boulder, CO 80301,
AB: During August of 2007, the Plate Boundary Observatory (PBO) successfully installed four Applied Geomechanics Lily Self Leveling Borehole Tiltmeters on Akutan Volcano, in the central Aleutian islands of Alaska. All four stations were collocated with existing PBO Global Positioning Systems (GPS) stations installed on the volcano in 2005. The tiltmeters will aid researchers in detecting and measuring flank deformation associated with future magmatic intrusions of the volcano. All four of the tiltmeters were installed by PBO field crews with helicopter support provided by JL Aviation and logistical support from the Trident Seafood Corporation, the City of Akutan, and the Akutan Corporation. Lack of roads and drivable trails on the remote volcanic island required that all drilling equipment be transported to each site from the village of Akutan by slinging gear beneath the helicopter and with internal loads. Each tiltmeter hole was drilled to a depth of approximately 30 feet with a portable hydraulic/pneumatic drill rig. The hole was then cased with splined 2.75 inch PVC. The PVC casing was cemented in place with grout and the tiltmeters were installed and packed with fine grain sand to stabilize the tiltmeters inside the casing. The existing PBO NetRS GPS receivers were configured to collect the tiltmeter data through a spare receiver serial port at one sample per minute and 1 hour files. Data from the GPS receivers and tiltmeters is telemetered directly or through a repeater radio to a base station located in the village of Akutan that transmits the data using satellite based communications to connect to the internet and to the UNAVCO Facility data archive where it is made freely available to the public.
DE: 1294 Instruments and techniques
DE: 8419 Volcano monitoring (7280)
DE: 8494 Instruments and techniques
SC: Geodesy [G]
MN: 2007 Fall Meeting