HR: 0800h
AN: V11C-0755    [Abstracts]
TI: Inflation of Kilauea Along the Southwest Rift Zone in 2006
AU: * Myer, D G
EM: dmyer@ucsd.edu
AF: Scripps Institution of Oceanography, University of California, San Diego 9500 Gilman Dr., La Jolla, CA 92093-0225, United States
AU: Sandwell, D
EM: dsandwell@ucsd.edu
AF: Scripps Institution of Oceanography, University of California, San Diego 9500 Gilman Dr., La Jolla, CA 92093-0225, United States
AU: Brooks, B
EM: bbrooks@soest.hawaii.edu
AF: School of Ocean & Earth Science & Technology, University of Hawai'i 1680 East-West Rd., Honolulu, HI 96822, United States
AU: Foster, J
EM: jfoster@soest.hawaii.edu
AF: School of Ocean & Earth Science & Technology, University of Hawai'i 1680 East-West Rd., Honolulu, HI 96822, United States
AU: Shimada, M
EM: shimada.masanobu@jaxa.jp
AF: ALOS Science project, JAXA/EORC, Sengen 2-1-1 Tsukuba, Ibaraki, 305-8505, Japan
AB: We report on InSAR and GPS results showing the first crustal inflation along the southwest rift zone at Kilauea volcano in over 30 years. Two independent interferograms (May 2 to August 2, 2006 and June 22 to Nov 7, 2006) from the ALOS PALSAR instrument reveal domal uplift located southwest of the main caldera. The uplift is bounded on the northeast by the caldera and follows the southwest rift zone for about 12 km. It is approximately 8 km wide. We use data derived from permanent GPS stations to calibrate the InSAR displacement data and estimate uplift of 8.3 cm during the first interferogram and 8.7 cm during the second with volumes of 2.8x10⁶ m³ and 2.4x10⁶ m³ respectively. The earthquake record for the periods before, during, and after inflation shows that a swarm of shallow earthquakes (z < 5 km) signaled the beginning of the uplift and that elevated levels of shallow seismicity along the rift zones occurred throughout the uplift period. GPS data indicate that the inflation occurred steadily over nine months between mid-January and mid-October, 2006 making injection of a sill unlikely.
DE: 1207 Transient deformation (6924, 7230, 7240)
DE: 1240 Satellite geodesy: results (6929, 7215, 7230, 7240)
DE: 6924 Interferometry (1207, 1209, 1242)
DE: 8485 Remote sensing of volcanoes
DE: 9355 Pacific Ocean
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2007 Fall Meeting