Observations of Deformation

Volcano number:312130
Country:United States
Geodetic measurements?Yes
Deformation observation?Yes
Measurement method(s):InSAR
Duration of observation:1992 - 2010
Inferred cause(s) of deformation:Magmatic
Characteristics of deformation:

Between 1996 and 1998, more than 20 cm of inflation was observed at Mount Peulik. Peak deformation rates were observed in Autumn of 1997. The total volume of inflation was ~0.06 kmĀ³ and is modelled by a point source at a depth of ~7 km beneath the center of Ugashik caldera. Deformation was aseismic and is thought to be due to gradual magma accumulation near to the brittle-ductile transition.

Reference(s):Lu, Z., Moran, S. C., Thatcher, Wayne, Wicks, C. J., Dzurisin, D., and Power, J. A., 2002, Magmatic inflation at a dormant stratovolcano: 1996-1998 activity at Mount Peulik volcano, revealed by satellite radar interferometry: Journal of Geophysical Research, v. 107, n. 7, p. 4-13.
Lu, Z., and Dzurisin, D., 2014, InSAR imaging of Aleutian volcanoes: Chichester, UK, Springer-Praxis, 390 p.
U.S. Geological Survey Alaska Volcano Observatory (AVO) website
Location:57.751, -156.368
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