Response of the lower and upper ionosphere after the eruption of Shiveluch volcano on april 10, 2023

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Abstract

The disturbances in the lower ionosphere and in the region of the maximum of the ionospheric F2 layer during the Shiveluch volcanic eruption in April 2023 are analyzed based on data from ground-based magnetometers and GPS radio sounding of the ionosphere. The magnetic stations were located at distances of 455 km (Paratunka) and 752 km (Magadan) from the volcano. The variations in the magnetic field and total electron content of the ionosphere were studied as characteristics of the ionospheric response to this event. An analysis of the measurements showed that the impact on the ionosphere is carried out by seismic Rayleigh waves and atmospheric acoustic-gravity waves generated by volcanic explosions. The energy of several explosions was estimated from the amplitude of the ionospheric signal in the total electron content.

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About the authors

S. A. Riabova

Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences; Sadovsky Institute of Geosphere Dynamics of Russian Academy of Sciences

Author for correspondence.
Email: ryabovasa@mail.ru
Russian Federation, Moscow; Moscow

S. L. Shalimov

Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences

Email: ryabovasa@mail.ru
Russian Federation, Moscow

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Supplementary files

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2. Fig. 1. Scalograms of geomagnetic variations at station. Paratunka during six episodes of increased activity of the Shiveluch volcano from 12:00 UT to 17:00 UT on April 10, 2023 (from 00 LT to 5 LT on April 11, 2023) (a) and from 17:00 UT to 22:00 UT April 10, 2023 (from 5 LT to 10 LT April 11, 2023) (b); white dashed lines – cone of influence.

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3. Fig. 2. Scalograms of geomagnetic variations at station. Magadan during six episodes of increased activity of the Shiveluch volcano from 12.00 UT on April 10, 2023 to 01.00 UT on April 11, 2023 (from 0 LT to 13 LT on April 11, 2023); white dashed lines – cone of influence.

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4. Fig. 3. Geographic map with projections of GPS satellite trajectories for the receiving station pett (the station location is indicated by a triangle). The direction of the trace projection is indicated by an arrow indicating the start and end times (UT = LT − 12). The maximum TEC variation for each trajectory projection is indicated by a circle. The location of the Shiveluch volcano is indicated by a star.

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5. Fig. 4. Filtered TEC signals and calculations of the areas of the compression phase (dash-dotted line) and rarefaction (shaded line): for the “station - satellite” pair pett-G20 for the interval 12:00‒14:00 UT April 10, 2023 (00:00‒02 :00 LT April 11, 2023) (a), pett-G30 for the interval 13:30−15:00 UT April 10, 2023 (01:30‒03:00 LT April 11, 2023) (b), pett-G13 for the interval 15:00‒17:00 UT April 10, 2023 (03:00‒05:00 LT April 11, 2023) (c); point - the maximum value of the filtered signal on the considered interval.

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