Hi Ray - Yes, we use InSAR and satellite radar to monitor our volcanoes. We have ongoing collaborations with several agencies that help provide data. Thanks, Cheryl -------- Ray Moreno wrote: Two questions Have you ever tried interferometric Synthetic Aperture Radar, to detect volcanic deformation? Maybe you have thought about it, but can't afford it? What would it take to rig up an aircraft with this type of radar and have monthly flyovers? -- Cheryl Cameron Geologist, Alaska Volcano Observatory Alaska Division of Geological & Geophysical Surveys voice: 907-451-5012 fax: 907-451-5050