USGS/Cascades Volcano Observatory, Vancouver, Washington
REPORT:
Tilt networks of Mount Shasta and Lassen Peak, California
--
Dzurisin, D., Johnson, D.J., Murray, T.L., and Myers, B., 1982,
Tilt networks of Mount Shasta and Lassen Peak, California:
U.S. Geological Survey Open-File Report 82-670, 42p.
Abstract
In response to recent eruptions at Mount St. Helens and with support
from the USGS Volcanic Hazards Program, the Cascades Volcano Observatory
(CVO) has initiated a program to monitor all potentially-active volcanoes
of the Cascade Range. As part of that effort, we installed tilt networks
and obtained baseline measurements at Mount Shasta and Lassen Peak,
California during July 1981. At the same time, baseline electronic
distance measurements (EDM) were made and fumarole surveys were conducted
by other crews from CVO. Annual surveys are planned initially, with
subsequent visits as conditions warrant. These geodetic and geochemical
measurements supplement a program of continuous seismic monitoring of
Cascade volcanoes by the USGS Office of Earthquake Studies in cooperation
with local universities.
Other tilt networks were established at Mount Baker in 1975 and at
Mount St. Helens in 1981. EDM networks were established at Mount Baker
in 1975, Mount St. Helens in 1980, and Crater Lake in 1981. Additional
tilt and/or EDM networks are planned for Mount Rainier, Mount Hood,
Glacier Peak, Three Sisters, and Crater Lake as funds permit.
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02/08/06, Lyn Topinka