- 1Graduate School of Science and Engineering, Chiba University, Japan (25wm1111@student.gs.chiba-u.jp)
- 2Research Institute of Disaster Medicine, Chiba University, Japan
- 3Graduate School of Science, Chiba University, Japan
- 4Center or Environmental Remote Sensing, Chiba University, Japan
- 5National Central University, Taiwan
In recent years, ionospheric disturbances related to earthquakes have been reported and are considered promising for short-term earthquake forecasting. However, ionospheric disturbances can also be caused by other factors, and their relationship with earthquakes is still not well understood.
In this study, we investigated the possibility to forecast short-term earthquakes using ionosonde data. We evaluated their earthquake precursory potential using Molchan's Error Diagram analysis. We also performed a statistical analysis of the ionospheric response to geomagnetic storms, a known source of ionospheric disturbances. In this analysis, we defined geomagnetic storms by Dst Index and classified into their occurrence time, magnitude, and season. We calculated the time period during which geomagnetic storms cause ionospheric anomalies. Based on these results, we removed the effects of geomagnetic storms and reevaluated the earthquake precursory potential.
Details will be shown in this presentation.
How to cite: Sasanuma, C., Song, R., Yoshino, C., Hattori, K., and Liu, J.-Y.: Assessment of Earthquake-related Ionospheric Disturbances Observed by Ionosonde, EGU General Assembly 2026, Vienna, Austria, 3–8 May 2026, EGU26-8728, https://doi.org/10.5194/egusphere-egu26-8728, 2026.
