| | |
Summary: The 12 September 1999 Upper East Rift Zone dike intrusion at
Kilauea Volcano, Hawaii
P. Cervelli,1,2
P. Segall,1
F. Amelung,3
H. Garbeil,3
C. Meertens,4
S. Owen,5
A. Miklius,6
and M. Lisowski7
Received 27 April 2001; revised 10 September 2001; accepted 19 September 2001; published 31 July 2002.
[1] Deformation associated with an earthquake swarm on 12 September 1999 in the
Upper East Rift Zone of Kilauea Volcano was recorded by continuous GPS receivers and
by borehole tiltmeters. Analyses of campaign GPS, leveling data, and interferometric
synthetic aperture radar (InSAR) data from the ERS-2 satellite also reveal significant
deformation from the swarm. We interpret the swarm as resulting from a dike intrusion
and model the deformation field using a constant pressure dike source. Nonlinear
inversion was used to find the model that best fits the data. The optimal dike is located
beneath and slightly to the west of Mauna Ulu, dips steeply toward the south, and
strikes nearly east-west. It is approximately 3 by 2 km across and was driven by a
|
