Comparison of volcanic explosions in Japan using impulsive ionospheric disturbances

Earth, Planets and Space

Kosuke Heki¹  Mokhamad Nur Cahyadi²  Ririn Wuri Rahayu²  Eko Yuli Handoko² 

[1] Dept. Earth Planet. Sci., Hokkaido University, Sapporo, Japan;Dept. Geomatic Engineering, ITS, Surabaya, Indonesia;

关键词: Ionospheric disturbance;    Asama;    Shin-Moe;    Sakurajima;    Kuchinoerabu-jima;    Volcanic explosion;    GNSS-TEC;   

DOI  :  10.1186/s40623-021-01539-5

来源: Springer

【 摘 要 】

Using 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 ~ 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.Graphical Abstract

【 授权许可】

CC BY