Alaska Satellite Facility
Delivering Remote Sensing Data Since 1991

ALOS PALSAR Reveals Volcanoes Sink After Large Earthquakes

Large earthquakes are known to trigger volcanic activity at volcanoes hundreds of km from their epicenters, but interferometric synthetic aperture radar (InSAR) data from Japan’s Advanced Land Observing Satellite (ALOS) Phased Array L-Band SAR (PALSAR) have revealed a new phenomenon — enhanced subsidence at some, but not all, volcanoes near two large earthquakes in Chile and Japan. The findings come from two unrelated research teams at Cornell University and Kyoto University.

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Insights on Southwest Sinkholes Through InSAR

At a recent conference on sinkholes, the Arizona Department of Water Resources (ADWR) presented a paper1 summarizing new findings on land subsidence in the Holbrook Basin, Arizona, detected through interferometric synthetic aperture radar (InSAR). In addition, ADWR drew upon its familiarity with InSAR to share with other attendees the results of on-the-spot downloading of data and InSAR processing and analysis.

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Select and download SAR data online using Vertex.

Use the ASF API for downloading SAR data via a command line.