Groundwater level changes in a deep well in response to a magma intrusion event on Kilauea Volcano, Hawai'i
Article first published online: 28 NOV 2003
Copyright 2003 by the American Geophysical Union.
Geophysical Research Letters
Volume 30, Issue 22, November 2003
How to Cite
2003), Groundwater level changes in a deep well in response to a magma intrusion event on Kilauea Volcano, Hawai'i, Geophys. Res. Lett., 30, 2173, doi:10.1029/2003GL018676, 22., and (
- Issue published online: 28 NOV 2003
- Article first published online: 28 NOV 2003
- Manuscript Accepted: 28 OCT 2003
- Manuscript Revised: 21 OCT 2003
- Manuscript Received: 20 SEP 2003
 On May 21, 2001, an abrupt inflation of Kilauea Volcano's summit induced a rapid and large increase in compressional strain, with a maximum of 2 μstrain recorded by a borehole dilatometer. Water level (pressure) simultaneously dropped by 6 cm. This mode of water level change (drop) is in contrast to that expected for compressional strain from poroelastic theory, and therefore it is proposed that the stress applied by the intrusion has caused opening of fractures or interflows that drained water out of the well. Upon relaxation of the stress recorded by the dilatometer, water levels have recovered at a similar rate. The proposed model has implications for the analysis of ground surface deformation and for mechanisms that trigger phreatomagmatic eruptions.