Volcano number:311090
Country:United States
Geodetic measurements?Yes
Deformation observation?Yes
Measurement method(s):InSAR
Duration of observation:2004 - 2009
Inferred cause of deformation:Magmatic
Characteristics of deformation:

During October – November 2005, an episode of surface uplift (3 – 5 cm) occurred encompassing┬áboth Tanaga and Takawanga volcanoes. In addition to this broad deformation signal, small localised displacements on the southeast flank of Takawanga correspond to a region of unusual seismicity. The broad region of uplift is modelled as a pressurising magma reservoir using a point source or a shallow-dipping prolate source that is elongate in the east-west direction. The source depth is inferred to be 5 – 8 km with a volume increase of 0.002 – 0.008 km┬│.

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:-178.006, 51.873

Photo of Takawangha. Source M Coombs, U.S. Geological Survey AVO website