Once a volcano erupts, severe disasters might be caused by molten rock, ashes, pyroclastic flow, and debris flow. To keep neighborhood safety from these disasters, it is important to observe the volcano, and to conduct hazard predictions. However, when a volcano erupts, a restricted area is set in a few kilometers radius around it, and it is difficult to obtain information inside the area. Based on the above situations, in this study, we developed a self-contained portable unmanned observation device that observes a volcano for a long time. The device includes some sensors and a satellite communication module. In this paper, we introduce design and development of the device, and report some satellite communication tests.
