Automatic Long Time Observation of the Volcanic Clouds at Satsuma-Iojima, Kyushu, Japan

概要

論文の詳細を見る
Continuous recording of volcanic clouds at Io-dake taken with digital and vidio cameras has been carried out since 1998 in Satsuma-Iojima, and also with automated monitoring system using a web camera since 2003. The results of the photo observation with one-hour interval for three years during 2000 and 2002, supplemented with video records with ten-minute interval, were summerized concerning the behaviour of the volcanic clouds, with special attention to their heights. Io-dake was almost always ejecting volcanic clouds with rather constant strength from the summit crater, while explosive eruptions were rarely seen. The cloud height seemed to be affected by wind velocity above the summit crater. That is, cloud height and wind velocity were roughly in reciprocal proportion to each other. In addition to this, an extra-rise in summer time was observed, compared with other seasons. The summit is often covered with a cap cloud in humid weather, especially in the summer.
鹿児島大学,カゴシマダイガク,Kagoshima Universityの論文