抄録
SAR imagery back scattering intensity data for two case studies, involving the small eruption of Sakurajima volcano, Japan in February 2008 and the large eruption of Chaitén volcano, Chile in May 2008 are used to detect volcanically disturbed areas. From this, a method of predicting or mitigating volcanically-induced sediment disasters is proposed. The results indicate the following points: 1) The areas disturbed by the volcanic eruption, such as by pyroclastic flow or lahars, can be identified from SAR images. 2) In both study areas, volcanic ash fall areas were not visible in the SAR images. 3) SAR imagery back scattering intensity data can be used to perform preliminary scans in emergency procedures, aiding the prediction and mitigation of volcanic eruption-induced sediment disasters.
