Comparison of volcanic explosions in Japan using impulsive ionospheric disturbances
Mokhamad Nur Cahyadi, Eko Yuli Handoko, Ririn Wuri Rahayu, Kosuke Heki
Abstract
Abstract 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
Topics & Concepts
TECIonosphereVolcanoGeologyTotal electron contentGNSS applicationsGeodesySeismologyAmplitudeExplosive materialSatelliteGeophysicsGeographyPhysicsAstronomyQuantum mechanicsArchaeologyEarthquake Detection and AnalysisIonosphere and magnetosphere dynamicsSeismic Waves and Analysis