Resumes
Resumes

As magma moves toward the surface, it interacts with anything in its path: hydrothermal systems, cooling magma bodies from previous eruptions, and (or) the surrounding "country rock." Magma also undergoes significant changes in its physical properties as pressure and temperature conditions change al...
Dipankar Saha, Seth C. Moran, Jeff T. Freymueller
Paperback
60
BiblioGov
1244007439
9781244007437
7
Six explosions occurred during 2004–5 in association with renewed eruptive activity at Mount St. Helens, Washington. Of four explosions in October 2004, none had precursory seismicity and two had explosion-related seismic tremor that marked the end of the explosion. However, seismicity levels droppe...
Seth C. Moran, Patrick J. McChesney, Andrew B. Lockhart
Kindle Edition
40
6
From October 2004 to May 2005, the Center for Earthquake Research and Information of the University of Memphis operated two to six broadband seismometers within 5 to 20 km of Mount St. Helens to help monitor recent seismic and volcanic activity. Approximately 57,000 earthquakes identified during the...
Seth C. Moran, Robert D. Norris, Stephen P. Horton
Kindle Edition
31
5
The reawakening of Mount St. Helens after 17 years and 11 months of slumber was heralded by a swarm of shallow (depth 2 earthquakes were occurring at a rate of ~1 per minute. A gradual transition from volcano-tectonic to hybrid and low-frequency events occurred along with this intensification, a cha...
Jacqueline Caplan-Auerbach, Amy K. Wright, Stephen D. Malone, Seth C. Moran, Weston A. Thelen, Anthony I. Qamar
Kindle Edition
68
4
The rapid onset of energetic seismicity on September 23, 2004, at Mount St. Helens caused seismologists at the Pacific Northwest Seismic Network and the Cascades Volcano Observatory to quickly improve and develop techniques that summarized and displayed seismic parameters for use by scientists and t...
Stephen D. Malone, Anthony I. Qamar, William P. Steele, Seth C. Moran, Weston A. Thelen
Kindle Edition
22
3
The instruments in place at the start of volcanic unrest at Mount St. Helens in 2004 were inadequate to record the large earthquakes and monitor the explosions that occurred as the eruption developed. To remedy this, new instruments were deployed and the short-period seismic network was modified. A ...
Patrick J. McChesney, Andrew B. Lockhart, Kelly J. Swinford, Marvin R. Couchman, Seth C. Moran, Richard G. LaHusen
Kindle Edition
29
1