Aseismic inflation of Westdahl Volcano, Alaska, revealed by satellite radar interferometry
- 1 June 2000
- journal article
- Published by American Geophysical Union (AGU) in Geophysical Research Letters
- Vol. 27 (11), 1567-1570
- https://doi.org/10.1029/1999gl011283
Abstract
Westdahl volcano, located at the west end of Unimak Island in the central Aleutian volcanic arc, Alaska, is a broad shield that produced moderate-sized eruptions in 1964, 1978–79, and 1991–92. Satellite radar interferometry detected about 17 cm of volcano-wide inflation from September 1993 to October 1998. Multiple independent interferograms reveal that the deformation rate has not been steady; more inflation occurred from 1993 to 1995 than from 1995 to 1998. Numerical modeling indicates that a source located about 9 km beneath the center of the volcano inflated by about 0.05 km³ from 1993 to 1998. On the basis of the timing and volume of recent eruptions at Westdahl and the fact that it has been inflating for more than 5 years, the next eruption can be expected within the next several yearsKeywords
This publication has 9 references indexed in Scilit:
- Synthetic aperture radar interferometry of Okmok volcano, Alaska: Radar observationsJournal of Geophysical Research, 2000
- Radar interferometry and its application to changes in the Earth's surfaceReviews of Geophysics, 1998
- Migration of Fluids Beneath Yellowstone Caldera Inferred from Satellite Radar InterferometryScience, 1998
- Dynamic deformation of Etna Volcano observed by satellite radar interferometryGeophysical Research Letters, 1998
- Crustal deformation at Long Valley Caldera, eastern California, 1992–1996 inferred from satellite radar interferometryGeophysical Research Letters, 1997
- Volcano geodesy: The search for magma reservoirs and the formation of eruptive ventsReviews of Geophysics, 1997
- Atmospheric effects in interferometric synthetic aperture radar surface deformation and topographic mapsJournal of Geophysical Research, 1997
- Global volcanic earthquake swarm database 1979-1989Published by US Geological Survey ,1996
- Satellite radar interferometry: Two‐dimensional phase unwrappingRadio Science, 1988