2024-03-29T10:42:38Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/839142023-09-06T16:03:57Zhdl_2115_20039hdl_2115_116Comparison of volcanic explosions in Japan using impulsive ionospheric disturbancesCahyadi, Mokhamad NurHandoko, Eko YuliRahayu, Ririn Wuri1000030280564Heki, Kosukeopen accessCreative Commons Attribution 4.0 InternationalIonospheric disturbanceAsamaShin-MoeSakurajimaKuchinoerabu-jimaVolcanic explosionGNSS-TEC445Using the ionospheric total electron content (TEC) data from ground-based Global Navigation Satellite System (GNSS) receivers in Japan, we compared ionospheric responses to five explosive volcanic eruptions 2004-2015 of the Asama, Shin-Moe, Sakurajima, and Kuchinoerabu-jima volcanoes. The TEC records show N-shaped disturbances with a period similar to 80 s propagating outward with the acoustic wave speed in the F region of the ionosphere. The amplitudes of these TEC disturbances are a few percent of the background absolute vertical TEC. We propose to use such relative amplitudes as a new index for the intensity of volcanic explosions.Springer2022engjournal articleVoRhttp://hdl.handle.net/2115/83914https://doi.org/10.1186/s40623-021-01539-5Earth planets and space731228https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/83914/1/Earth%20Planets%20space_73_228.pdfapplication/pdf1.52 MB2022