Portland State University. Department of Earth Sciences
Ansel G. Johnson
Date of Award
Master of Science (M.S.) in Geology
1 online resource (173 p.)
Tiltmeter, Volcanic activity prediction, Mount Saint Helens (Wash.)
Mount St. Helens returned to an active eruptive state March 20, 1980. Since then explosive and dome building eruptions have caused major topographic changes to the mountain and surrounding drainages. Monitoring of the southern side of the mountain by six tiltmeters at distances between 6 km and 12 km was conducted during the period of July 1, 1980 to December 31, 1980. Records obtained from the tiltmeters were analyzed and compared to data from precision geodetic surveys.
Brown, Edward Charles, "Tiltmeter analysis of Mount St. Helens, Skamania County, Washington" (1984). Dissertations and Theses. Paper 3360.