Magnetic Signatures of the 15 January 2022 Hunga Tonga–Hunga Ha'apai Volcanic Eruption

Schnepf, N. R.; Minami, T.; Toh, H.; Nair, M. C.

doi:10.1029/2022GL098454

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Magnetic Signatures of the 15 January 2022 Hunga Tonga–Hunga Ha'apai Volcanic Eruption

2022
By Schnepf, N. R. ; Minami, T. ; Toh, H. ; ...
Source: Geophysical Research Letters, 49(10)

[PDF-2.34 MB]

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Details:

Journal Title:

Geophysical Research Letters
Personal Author:

Schnepf, N. R. ; Minami, T. ; Toh, H. ; Nair, M. C.

Schnepf, N. R. ; Minami, T. ; Toh, H. ; Nair, M. C. Less -
NOAA Program & Office:

NESDIS (National Environmental Satellite, Data, and Information Service) ; NCEI (National Centers for Environmental Information) ; CIRES (Cooperative Institute for Research in Environmental Sciences)

NESDIS (National Environmental Satellite, Data, and Information Service) ; NCEI (National Centers for Environmental Information) ; CIRES (Cooperative Institute for Research in Environmental Sciences) Less -
Description:

On 15 January 2022, at around 04:00 UTC, the submarine volcano Hunga Tonga-Hunga Ha'apai explosively erupted. We examine data from 10 Pacific Ocean geomagnetic observatories and process the data using both high pass filters and cross-wavelet analyses to enable evaluating the time-frequency characteristics of the magnetic signals across the Pacific region. At the Western Samoa observatory (API), magnetic signals of 3–8 min period, and visible in both vertical and horizontal fields, arrived at ∼04:44 UTC. The observatories at Chichijima Island (CBI) and Easter Island (IPM) both had local magnetic signatures concurrent with the eruption's water wave arrival and period ranges from, respectively, 13–93 and 5–100+ min. At CBI and IPM, the magnetic signal may be due to both the eruption's tsunami water wave and atmospheric/ionospheric sources. Our results suggest that the magnetic signatures from the eruption are identifiable and may be further separated in future studies.
Keywords:

[+]

Magnetic Induction Tsunamis Volcanic Eruptions Atmospheric Waves General Earth And Planetary Sciences Geophysics Ionospheric Waves Magnetic Induction Tsunami Volcanic Eruption
Source:

Geophysical Research Letters, 49(10)
DOI:

https://doi.org/10.1029/2022GL098454
ISSN:

0094-8276;1944-8007;
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PDF
Publisher:

American Geophysical Union (AGU)
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Journal Article
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Submitted
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urn:sha256:21e0b9053e3b590afc4260416ba404edb9a7252adad40cf3abf07d4b165a7df9
Download URL:

https://repository.library.noaa.gov/view/noaa/48922/noaa_48922_DS1.pdf
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