Magnetospheric response of two types in PSc geomagnetic pulsations to interaction with interplanetary shock waves

Author:

Пархомов Владимир1,Parhomov Vladimir2,Бородкова Наталия3,Borodkova Natalia4,Яхнин Александр5,Yahnin Aleksandr6,Теро Райта7,Tero Raita8,Цэгмэд Б.9,Tsegmed B.10,Хомутов Сергей11,Khomutov Sergey12,Пашинин Александр13,Pashinin Aleksandr14,Чиликин Виталий1,Chilikin Vitaliy2,Мочалов Алексей5,Mochalov Aleksey6

Affiliation:

1. Байкальский государственный университет

2. Baikal State University

3. Институт космических исследований РАН

4. Institute of Space Research RAS

5. Полярный геофизический институт

6. Polar Geophysical Institute

7. Геофизическая обсерватория Соданкюля

8. Sodankylä Geophysical Observatory

9. Институт астрономии и геофизики АН Монголии

10. Institute of Astronomy and Geophysics AS Mongolia

11. Институт космофизических исследований и распространения радиоволн ДВО РАН

12. Institute of Cosmophysical Research and Radio Wave Propagation FEB RAS

13. Институт солнечно-земной физики СО РАН

14. Institute of Solar Terrestrial Physics SB RAS

Abstract

Using the June 22, 2015 event as an example, we present new data confirming the presence of a precursor of the sudden magnetic impulse caused by a powerful interplanetary shock wave (ISW). The precursor in the form of a train of oscillations (broadband pulse) with a falling frequency in the range 0.25÷11 Hz with a duration of ~20 s, which had a spectral resonance structure, was recorded globally by a network of induction magnetometers at 18:33:27 UT. No significant phase delays of the signals were detected in four frequency bands at widely spaced observatories. It is suggested that the impulse can be excited in the Earth – ionosphere waveguide by a pulsed electric field which occurs in the ionosphere due to the short-term impact of ISW on the magnetosphere.

Publisher

Infra-M Academic Publishing House

Subject

Space and Planetary Science,Atmospheric Science,Geophysics

Reference35 articles.

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