USGS/Cascades Volcano Observatory, Vancouver, Washington
REPORT:
Crustal Subsidence, Seismicity, and Structure
Near Medicine Lake Volcano, California
--
D. Dzurisin, J.M. Donnelly-Nolan, J.R. Evans, and S.R. Walter, 1991,
Crustal Subsidence, Seismicity, and Structure Near Medicine Lake Volcano,
California:
IN: Journal of Geophysical Research, v.96, no.B10.,
p.16,319-16,333, September 10, 1991
Introduction and Scope
The Medicine Lake region in northeastern California, located near the margin of
the Cascades volcanic chain and the Basin and Range tectonic province, provides
and excellent opportunity to study the relation between tectonism and magmatism
near a convergent plate margin. The region is seismically active, and
earthquakes have been monitored for several decades. Extensive leveling surveys
were conducted throughout the region in 1954, and they can be repeated to
determine vertical strains. In addition, Medicine Lake volcano's recent
eruptive history is well known, and the regional crustal structure has been
studied using various geophysical techniques. Our study combines results from
repeat leveling surveys, earthquake monitoring, and measurements of crustal
structure to develop a model that explains most aspects of contemporary ground
deformation and seismicity.
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04/05/00, Lyn Topinka