Seismic evidence for magma in the vicinity of Mt. Katmai, Alaska

Geophysical Research Letters
By: , and 

Links

Abstract

P-wave traveltime delays of as much as 0.9 sec are consistently observed at one seismic station from local and regional earthquakes 70 to 150 km deep. This station is on the southwest flank of Mt. Trident, the most recently active volcano within Katmai National Park, Alaska. Delays from local shallow earthquakes are typically less than 0.3 sec, suggesting that most of the major delay results from anomalous material at depths of more than a few kilometers. This station is located near the center of a bowlshaped low in the Bouguer gravity field that is approximately 15 km in diameter and more than 25 mgals deep. These anomalies suggest, but do not prove, the presence of considerable amounts of magma in the shallow part of the crust that could have been the source for all magma erupted in the vicinity of Mt. Katmai and Mt. Trident this century.

Study Area

Publication type Article
Publication Subtype Journal Article
Title Seismic evidence for magma in the vicinity of Mt. Katmai, Alaska
Series title Geophysical Research Letters
DOI 10.1029/91GL01906
Volume 18
Issue 8
Year Published 1991
Language English
Publisher American Geophysical Union
Description 4 p.
First page 1537
Last page 1540
Country United States
State Alaska
Other Geospatial Mount Katmai
Google Analytic Metrics Metrics page
Additional publication details