HR: 08:30h
AN: V51H-03    [Abstracts]
TI: Father's Day dike intrusion and eruption reveals interaction between magmatic and tectonic processes at Kilauea Volcano, Hawaii
AU: * Foster, J H
EM: jfoster@soest.hawaii.edu
AF: SOEST, University of Hawaii, 1680 East West Road, Honolulu, HI 96822, United States
AU: Brooks, B A
EM: bbrooks@soest.hawaii.edu
AF: SOEST, University of Hawaii, 1680 East West Road, Honolulu, HI 96822, United States
AU: Sandwell, D T
EM: dsandwell@ucsd.edu
AF: Scripps Institution of Oceanography, 8795 Biological Grade, La Jolla, CA 92037, United States
AU: Poland, M
EM: mpoland@usgs.gov
AF: USGS-HVO, Reginald Okamura Building Crater Rim Road, Hawaii Volcanoes Nat, HI 96718, United States
AU: Miklius, A
EM: asta@usgs.gov
AF: USGS-HVO, Reginald Okamura Building Crater Rim Road, Hawaii Volcanoes Nat, HI 96718, United States
AU: Myer, D
EM: dmyer@ucsd.edu
AF: Scripps Institution of Oceanography, 8795 Biological Grade, La Jolla, CA 92037, United States
AU: Okubo, P G
EM: pokubo@usgs.gov
AF: USGS-HVO, Reginald Okamura Building Crater Rim Road, Hawaii Volcanoes Nat, HI 96718, United States
AU: Patrick, M
EM: mpatrick@mtu.edu
AF: Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, United States
AU: Wolfe, C
EM: cecily@soest.hawaii.edu
AF: SOEST, University of Hawaii, 1680 East West Road, Honolulu, HI 96822, United States
AB: The June 17-19, 2007, Father's Day dike intrusion and eruption at Kilauea volcano brought to an end a seven- year period of steady state lava effusion at the Pu'u 'O'o vent. The event was observed by an unprecedented number of geophysical instruments, with temporary arrays of GPS and tiltmeters augmenting the continuous monitoring network. Envisat and ALOS SAR scenes were also acquired during this event and provide further information on the surface deformation as the event progressed. Fortuitously, the Envisat acquisition was during a pause in the middle of the sequence, while the ALOS PALSAR scene was acquired at the end of the sequence, allowing us to model each phase separately. Analysis of these data sets indicates that, in addition to three phases of the dike intrusion, a slow earthquake also occurred on the south flank of Kilauea. The slow earthquake apparently began near the end of the second phase of the dike intrusion. It was still underway the following day, when the third phase of the intrusion began and culminated in a small eruption. This suggests the possibility that the slow earthquake was triggered by the initial diking, and then in turn influenced the progression of the intrusion. Two of the largest previous slow earthquakes also hint at a connection between slow earthquakes and eruptive activity on Kilauea. The range of observations of the Father's Day events provides us with a unique opportunity to investigate the complex interactions between the tectonic processes of the south flank and magmatic processes within the summit and rift zones.
DE: 1209 Tectonic deformation (6924)
DE: 1240 Satellite geodesy: results (6929, 7215, 7230, 7240)
DE: 8178 Tectonics and magmatism
DE: 8419 Volcano monitoring (7280)
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2007 Fall Meeting