Assessment of the stability for active volcanic small island by use of SAR interferometry: A case study in Nishinoshima island

In this paper, we present the results of the stability assessment based on Interferometric Synthetic Aperture Radar (InSAR) for the active volcano. The stability of the lava is a quite important problem for the risk management. However, there are limited tools, especially in distant places, to analyze whether the lava will continuously spread or it will stop flowing. InSAR has been used for the deformation detection in the volcanology since 90th century. However, it has not been confirmed that it can be used for this kind of requirement. We present some InSAR results for Nishinoshima island to show that SAR interferometry is an effective tool for the stability assessment of the lava by showing its concretation in six months in time series analysis.