Ionospheric Disturbances after the 2022 Hunga Tonga-Hunga Ha’apai Eruption above Indonesia from GNSS-TEC Observations

Muafiry, Ihsan Naufal; Meilano, Irwan; Heki, Kosuke; Wijaya, Dudy D.; Nugraha, Kris Adi

Ionospheric Disturbances after the 2022 Hunga Tonga-Hunga Ha’apai Eruption above Indonesia from GNSS-TEC Observations

Muafiry, Ihsan Naufal; Meilano, Irwan; Heki, Kosuke et al.

Atmosphere, 2022, 13(10), 1615

Permalink : https://hdl.handle.net/2115/90342

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アクセス権	open access
URI	https://hdl.handle.net/2115/90342
タイトル	Ionospheric Disturbances after the 2022 Hunga Tonga-Hunga Ha’apai Eruption above Indonesia from GNSS-TEC Observations
著者	Muafiry, Ihsan Naufal ; Meilano, Irwan ; Heki, Kosuke ; Wijaya, Dudy D. ; Nugraha, Kris Adi
著者名 Muafiry, Ihsan Naufal
著者名 Meilano, Irwan
e-Rad_Researcher 30280564 著者名 Heki, Kosuke
著者名 Wijaya, Dudy D.
著者名 Nugraha, Kris Adi
言語	英語
キーワード	HTHH eruption
	Lamb wave
	GNSS
	ionospheric anomalies
	Indonesia
発行日	2022-10
出版者	MDPI
収録物名	Atmosphere
巻(号)	13(10)
ページ	1615
抄録	On 15 January 2022, a VEI 5 eruption occurred at the submarine Hunga Tonga-Hunga Ha’apai (HTHH) Volcano in the Southwest Pacific, causing an ash plume reaching a height of 50–55 km. The eruption generated strong acoustic-gravity waves in the near-field and stations all over the world recorded Lamb waves (LW) that travelled around the earth multiple times at a speed of ~0.3 km/s. Here we report ionospheric anomalies due to the LW over Indonesian islands, 5000–10,000 km away from the volcano, in terms of changes in total electron contents (TEC) using the nationwide network of GNSS stations. We detected ionospheric anomalies travelling above Indonesia several times both westward and eastward. The first passage of LW over Java caused strong TEC increases of >12 TECU. The wave circled the earth and returned to Java on subsequent days. The second passage was recorded early 1/17, the anomaly decayed to 6 TECU. We also detected the passage of long-path waves propagating from west to east. In addition to such anomalies, we examined the existence of ionospheric disturbances apparently propagating from the geomagnetic conjugate point of the volcano that could possibly emerge in Indonesia. However, their signatures in Indonesia were not clear.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution 4.0 International
EISSN	2073-4433
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.3390/atmos13101615