Pacific tsunamigenic earthquakes of early 2024

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Аннотация

Using the example of two tsunamigenic earthquakes, a method for determining the magnitude of the displacement of the seabed, which is the cause of the tsunami, is being worked out. It is shown that with an average coefficient of divergence of deformation anomalies recorded by a laser strainmeter for the entire planet, it is possible to approximately estimate the amount of displacement of the seabed at the site of tsunami formation. For each region where the tsunami originated, there are more accurate divergence coefficients that can be estimated experimentally and from which the values of seabed displacements can be more accurately determined.

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Авторлар туралы

G. Dolgikh

Il'ichev Pacific Oceanological Institute FEB RAS

Хат алмасуға жауапты Автор.
Email: dolgikh@poi.dvo.ru
Ресей, Baltiyskaya str., 43, Vladivostok, 690041

S. Dolgikh

Il'ichev Pacific Oceanological Institute FEB RAS

Email: sdolgikh@poi.dvo.ru
Ресей, Baltiyskaya str., 43, Vladivostok, 690041

Әдебиет тізімі

  1. Долгих Г.И., Долгих C.Г. Деформационные аномалии как индикатор генерации цунами // Доклады Российской Академии наук. Науки о Земле. 2022. Т. 502. № 2. С. 77–82.
  2. Dolgikh G.I. Principles of the designing single-coordinate laser strainmeters // Technical Physics Lett. 2011. V. 37(3). P. 204–206.
  3. Dolgikh G., Dolgikh S. Deformation Anomalies Accompanying Tsunami Origination // J. Mar. Sci. Eng. 2021. V. 9. 1144.
  4. Dolgikh G., Dolgikh S. Deformation Anomalies Accompanying Tsunami Origins near the Japanese Islands // J. Mar. Sci. Eng. 2023. V. 11(11). 2137.
  5. Gemma Conroy Japan earthquakes: the science behind the deadly tremors // Nature. 2024. Jan 3.
  6. Hirose F., Tamaribuchi K., Kobayashi A. et al. Relation between earthquake swarm activity and tides in the Noto region, Japan // Earth Planets Space. 2024. V. 76. 37. https://earthquake.usgs.gov/earthquakes/
  7. Stein S., Okal E.A. Speed and size of the Sumatra earthquake // Nature. 2005. V. 434. № 7033. P. 581–582.
  8. Wei Y., Newman A.V., Hayes G.P. Titov V.V., Tang L. Tsunami forecast by joint inversion of real-time tsunami waveforms and seismic or GPS Data: Application to the Tohoku 2011 tsunami // Pure and Applied Geophysics. 2014. V. 171. P. 3281–3305.

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1. JATS XML
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2. Fig. 1. Horizontal laser strainmeter with a measuring arm length of 52.5 m. a – central interference unit of the laser strainmeter; b – underground pipeline with a vacuum pipe.

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3. Fig. 2. Earthquake in the Sea of ​​Japan on 01.01.2024

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4. Fig. 3. Earthquake in the Sea of ​​Japan on January 1, 2024, as recorded by a laser strainmeter and a broadband seismometer (UTC time). a ‒ fragment of a laser strainmeter recording lasting 137 min, b ‒ enlarged fragment of the earthquake recording by a laser strainmeter, c ‒ fragment of a broadband seismometer recording.

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5. Fig. 4. Earthquake in Taiwan 02.04.2024

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6. Fig. 5. Taiwan earthquake as recorded by a laser strainmeter (UTC time). a — fragment of a 70-minute laser strainmeter recording, b — enlarged fragment of the earthquake recording, c — fragment of a broadband seismometer recording.

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© Russian Academy of Sciences, 2024