リモートセンシングによる伊豆鳥島の2002年噴火後の地殻変動と温度分布の観測

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The volcanic island, Izu-Torishima, erupted in August, 2002. The National Research Institute for Earth Science and Disaster Prevention observed the crustal deformation and surface temperature distribution of the island after the eruption by using remote-sensing techniques of Interferometric Synthetic Aperture Rader (InSAR) and airborne Multi-Spectral Scanner (MSS). The InSAR image from RADARSAT-1 data acquired about 15 and 40 days after the eruption exhibits no large deformation exceeding several centimeters for the entire island, showing the limit of the analysis without any ground control points (GCPs). However, a small local movement (less than 2.8cm) is observable at the center of the island. The airborne MSS, VAM-90A, obtained the surface temperature distribution from infrared bands and pseudo-color images from visible and near-infrared bands almost one year after the eruption. The high-temperature area (over 70℃) is limited around the central crater, where the ground surface is covered by sublimed sulfur. The highest temperature of 80℃ is detected in this area.
特定非営利活動法人日本火山学会の論文
2007-02-28