T-wave propagation from the Pacific to the Atlantic: the 2020 M7.4 Kermadec Trench earthquake case
T-wave propagation from the Pacific to the Atlantic: the 2020 M7.4 Kermadec Trench earthquake case
Date
2021-12-13
Authors
Oliveira, Tiago C. A.
Lin, Ying-Tsong
Kushida, Noriyuki
Jesus, Sérgio M.
Nielsen, Peter
Lin, Ying-Tsong
Kushida, Noriyuki
Jesus, Sérgio M.
Nielsen, Peter
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10.1121/10.0008939
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Abstract
An Mw7.4 submarine earthquake occurred in the Kermadec Trench, northeast of New Zealand, on 18 June, 2020. This powerful earthquake triggered energetic tertiary waves (T-waves) that propagated through the South Pacific Ocean into the South Atlantic Ocean, where the T-waves were recorded by a hydrophone station near Ascension Island, 15 127 km away from the epicenter. Different T-wave arrivals were identified during the earthquake period with arrival angles deviating from the geodesic path. A three-dimensional sound propagation model has been utilized to investigate the cause of the deviation and confirm the horizontal diffraction of the T-waves at the Drake Passage.
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© The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Oliveira, T. C. A., Lin, Y.-T., Kushida, N., Jesus, S. M., & Nielsen, P. T-wave propagation from the Pacific to the Atlantic: the 2020 M7.4 Kermadec Trench earthquake case. JASA Express Letters, 1(12), (2021): 126001, https://doi.org/10.1121/10.0008939.
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Oliveira, T. C. A., Lin, Y.-T., Kushida, N., Jesus, S. M., & Nielsen, P. (2021). T-wave propagation from the Pacific to the Atlantic: the 2020 M7.4 Kermadec Trench earthquake case. JASA Express Letters, 1(12), 126001.
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