PoS - Proceedings of Science
Volume 444 - 38th International Cosmic Ray Conference (ICRC2023) - Cosmic-Ray Physics (Indirect, CRI)
Observation of the atmospheric wave created by Hunga Tonga-Hunga Ha’apai volcano eruption using GRAPES-3 detectors
B. Hariharan*, M. Chakraborty, S.R. Dugad, S.K. Gupta, Y. Hayashi, P. Jagadeesan, A. Jain, S. Kawakami, H. Kojima, S. Mahapatra, P.K. Mohanty, Y. Muraki, P.K. Nayak, T. Nonaka, A. Oshima, D. Pattanaik, M. Rameez, K. Ramesh, L.V. Reddy, S. Shibata and M. Zuberi
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Pre-published on: August 05, 2023
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Abstract
The Hunga Tonga-Hunga Ha‘apai volcano eruption on 15 January 2022 is the largest volcanic eruption after Krakatoa in 1883. This eruption triggered catastrophic events such as tsunami
waves, atmospheric shock waves, and sonic booms. The eruption injected about 10% of the water vapour found in the stratosphere, which may lead to a global temperature rise. Recent studies by NASA and ESA revealed records of high-speed winds in the upper atmosphere and unusual electric currents found in the ionosphere immediately after the eruption. It is one of the most destructive events observed over the past century with a direct impact on global weather. A pressure wave created by this violent eruption circled the globe multiple times, recorded by numerous instruments around the world. The GRAPES-3 is a ground-based cosmic ray experiment consisting of an array of plastic scintillators and a large area muon telescope to record secondary cosmic rays in the
extensive air showers produced by the interaction of primary cosmic rays in the atmosphere. It also monitors the local atmospheric pressure at Ooty in order to account for the impact of pressure on the count rate of secondary cosmic ray particles. Both the scintillator array and the muon telescope recorded a sudden change in the count rate that coincided with the pressure variation associated with the volcano eruption. We will present the analysis and interpretation during the conference.
DOI: https://doi.org/10.22323/1.444.0530
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