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Deformation of New Trident Volcano measured by ERS‐1 SAR interferometry, Katmai National Park, Alaska
Author(s) -
Lu Z.,
Fatland R.,
Wyss M.,
Li S.,
Eichelberger J.,
Dean K.,
Freymueller J.
Publication year - 1997
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/97gl00539
Subject(s) - geology , volcano , interferometric synthetic aperture radar , interferometry , synthetic aperture radar , trident , seismology , geodesy , arctic , remote sensing , coherence (philosophical gambling strategy) , national park , oceanography , geography , optics , physics , archaeology , quantum mechanics
Using Synthetic Aperture Radar (SAR) interferometry, we detect several centimeters of uplift that accumulated during two years (1993–1995) around the vent of the New Trident volcano in Alaska's Katmai National Park. The areas of image coherence correspond to fresh, blocky lavas, while coherence is lost in ash‐covered areas. From the uplift gradient we estimate the depth of a pressure source under New Trident volcano to be approximately 0.8–2.0 km. Our results show that in spite of the difficult sub‐arctic environment of southern Alaska, strain build‐up can be monitored over a two‐year period, showing the potential for global monitoring of volcano deformation using SAR interferometry.