Observations of Deformation

Volcano number:312270
Country:United States
Geodetic measurements?Yes
Deformation observation?Yes
Measurement method(s):InSAR
Inferred cause(s) of deformation:Magmatic, isostatic rebound
Characteristics of deformation:

Deformation observed at Douglas covers both the Douglas and  Fourpeaked areas. InSAR measurements show broad inflation of this region between 2003–2010, with deformation mostly vertical. This deformation is modelled by a Mogi source of poorly constrained depth (5 – 10 km). Fixing the depth to that of local seismicity (7 km) yields an average rate of volume change of ~0.004 km³/year. Deformation is attributed to magmatic intrusion (possibly episodic), or isostatic rebound as the ice cap thins and recedes. 

Reference(s):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:58.855, -153.542
REST API endpoint (JSON):

Latest Sentinel-1 Data

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