High magma storage rates before the 1983 eruption of kilauea, hawaii
After a magnitude 7.2 earthquake in 1975 and before the start of the ongoing eruption in 1983, deformation of Kilauea volcano was the most rapid ever recorded. Three-dimensional numerical modeling shows that this deformation is consistent with the dilation of a dike within Kilauea's rift zones coupled with creep over a narrow area of a low-angle fault beneath the south flank. Magma supply is estimated to be 0.18 cubic kilometers per year, twice that of previous estimates. The 1983 eruption may be a direct consequence of the high rates of magma storage within the rift zone that followed the 1975 earthquake.
Cayol
V
U.S. Geological Survey, 345 Middlefield Road, MS 977, Menlo Park, CA 94025, USA. U.S. Geological Survey, Hawaiian Volcano Observatory, HI 96718, USA.
Dieterich
JH
Okamura
AT
Miklius
A