Volcano number:312060
Country:United States
Geodetic measurements?Yes
Deformation observation?Yes
Measurement method(s):InSAR
Duration of observation:1992 - 2010
Inferred cause of deformation:Hydrothermal, Magmatic
Characteristics of deformation:

Interferograms show long term subsidence of Kupreanof at < 5 mm/yr. Between 2002 – 2003, > 5 cm of inflation is also observed. The location of the subsidence and inflation sources is the same, and both signals are modelled using a point source at 4 – 6┬ákm depth. The subsidence source may extend to shallower levels (< 3 km depth) and also involve the hydrothermal system above an active magmatic system. The period of inflation is attributed to an intrusion of magma, and subsidence may result from cooling and volatile loss from magma intruded into the reservoir, or a reduction in pore fluid pressure due to cooling and volatile loss from the hydrothermal system.

Reference:Lu, Z., and Dzurisin, D., 2014, InSAR imaging of Aleutian volcanoes: Chichester, UK, Springer-Praxis, 390 p.
Reference:U.S. Geological Survey Alaska Volcano Observatory (AVO) website
Location:-159.797, 56.011

Photo of Kupreanof. Source T. Miller, U.S. Geological Survey AVO website