1. 3D Traveling Ionospheric Disturbances During the 2022 Hunga Tonga–Hunga Ha'apai Eruption Using GNSS TEC.
- Author
-
Cahyadi, Mokhamad Nur, Muslim, Buldan, Muafiry, Ihsan Naufal, Gusman, Aditya Riadi, Handoko, Eko Yuli, Anjasmara, Ira Mutiara, Putra, Meilfan Eka, Wulansari, Mega, Lestari, Dwi Sri, Jin, Shuanggen, and Sri Sumantyo, Josaphat Tetuko
- Subjects
HUNGA Tonga-Hunga Ha'apai Eruption & Tsunami, 2022 ,IONOSPHERIC disturbances ,VOLCANIC eruptions ,TSUNAMIS ,GLOBAL Positioning System ,ATMOSPHERIC waves ,LAMB waves - Abstract
The dual frequency Global Navigation Satellite System (GNSS) observations could determine the total electron content (TEC) in the ionosphere. In this study, GNSS TEC was applied to detect traveling ionospheric disturbances (TIDs) after the eruption of Hunga Tonga–Hunga Ha'apai (HTHH) on 15 January 2022. The eruption caused two types of tsunamis, first is tsunami generated by atmospheric wave (meteo‐tsunami) and second is caused by eruption induces water displacement or tsunami classic. At the same time with former tsunami, the atmospheric wave (shock and lamb waves) also caused TIDs at a speed of approximately ∼0.3 km/s. We found moderate correlation between this TIDs amplitude and the tsunami wave height model from tide gauge stations in New Zealand (0.64) and Australia (0.65). Further we attempted to reveal 3D structure of the TIDs in New Zealand, South Australia, and Philippines using 3D tomography. The tomography was set up > 1,170 blocks, as large as 1.0° (east–west) × 1.0° (north–south) × 100 km (vertical), up to 600 km altitude over selected regions. Tomogram shows beautiful concentric directivity of the first TIDs generated by atmospheric wave (AW). Key Points: 3D ionospheric disturbances during the 2022 Tonga eruption was investigated with spatial and temporal directionThe highest concentration of the electron disturbances was observed at an altitude of 200–300 km, which decreased at 500–600 kmA correlation between ionospheric disturbances and the height of tsunami associated with eruption was observed [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF