Detection of volcano deformations and coseismic movements using JERS-1 L-band SAR differential interferometry; combination with other geodetic measurements

We have carried out JERS-1 differential interferometry (DinSAR) research in volcano and earthquake monitoring as `The Earthquake Remote Sensing Frontier Project´ since 1997. The potential of L-band SAR interferometry to detect subtle crustal movements even in mountainous regions in Japan and its geodetic accuracy were evaluated by comparison and combination with other geodetic and seismological observations (e.g. GPS network, leveling survey, precise gravity measurement, strong motion seismology). So far we have succeeded in several cases; (1) lateral fault motion by the Kagoshima earthquake (M=6.3) in 1997, (2) volcano inflation and the following earthquake (M=6.1) around Mt. Iwate in 1998, (3) tensile deformation associated with earthquake swarms around the monogenetic volcano area in the Izu Peninsula in 1997 and 1998