Volcano Watch — It’s All About Perspective: How to Interpret an Interferogram
Volcano Watch is a weekly article and activity update written by U.S. Geological Survey Hawaiian Volcano Observatory scientists and affiliates. Today's article is by Tyler Paladino, a Postdoctoral Fellow with the U.S. Geological Survey. Panels A and B show what an interferogram would look like for a simple expanding spherical magma chamber from an ascending and descending orbital perspective. The star shows the true center of the inflating magma source. The arrow and bar denote satellite flight direction and look direction respectively. Each fringe represents approximately 1.55 cm. Panels C and D show the same event in a cross-section view.