Observations of Deformation
|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|
|REST API endpoint (JSON):||https://comet.nerc.ac.uk/wp-json/volcanodb/v1/volcano/729|