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- G11A-04: A Compilation of Volcanic Deformation and Geodetic Source Models Across the Aleutian Arc
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NOLA CC
Author(s):Generic 'disconnected' Message
Yitian Cheng, Geophysical Institute, University of Alaska Fairbanks (First Author, Presenting Author)
Ronni Grapenthin, University of Alaska Fairbanks
There are more than 50 active volcanoes in the Alaska Aleutian Arc, whose eruptions are frequent and often pose threats to nearby communities and air traffic. Magma movements under volcanoes often cause the surface to deform, and geodesy techniques can detect such deformation and thus help identify magma movement. Over the past 34 years, scientists have used such techniques to track the deformation history of many Aleutian volcanoes. In this study we compile all their results, and also add some of the new results we found, to make an Aleutian volcano deformation database. We found that deformation is so common on the arc with various time ranges and intensities. We also found that there is a systematic pattern of the magma storage depth inferred by geodesy research across the arc. This study is the first arc-wide survey of volcano deformation and it highlights how capable geodesy instruments including GNSS and satellite are in helping monitor volcano activity and improve eruption forecasting and hazard mitigation.
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