Bulletin of ANPA

Abstract submitted to ANPA Conference July 14–16, 2023

Volume 5, Number 1

Astronomy /Space Science /Cosmo Science/ Atmospheric
Abstract ID: ANPA2023-N0008

Abstract:

ANPA2023-N0008: Magnetospheric Pc Pulsation as seen from Solar Wind and Geomagnetic Indices during the September 8th 2017 Solar Storm

Authors:

  • Purna Jyoti Shakya; Patan Multiple Campus, IoST, Tribhuvan University, Nepal
  • Anata Panthi; Butwal Multiple Campus, IoST, Tribhuvan University, Nepal
  • Binod Adikari; Patan Multiple Campus, IoST, Tribhuvan University, Nepal
  • Andres Calabia Aibar; University of Alcala, Alcalá de Henares, Spain

Ultra low frequency (ULF) waves are an important consideration to identify the dominant process that transfer energy from solar wind to Earth’s inner magnetosphere as they propagate electromagnetic energy over vast distance with little dissipation. The waves observed on the Earth depends on conditions in the solar wind and in the magnetosphere. In this work, we investigate the Pc pulsation observed in the 12-15 UT time interval during geomagnetic storm of September 8th 2017 using data from the SuperMAG and the OMNIWeb services. We used Pc pulsation data observed at T48 station (geographic latitude: 54.8o, geographic longitude: 293.19o), Schefferville, Canada. Cross-correlation analysis shows that Pc2, Pc3, Pc4 and Pc5 ULF wave are positively correlated with interplanetary magnetic field, AE index and Polar cap index. Similarly, cross-correlation of Pc pulsations with solar wind density (Nsw), solar wind pressure (Psw) and solar wind velocity (Vsw), shows that they are positively correlated with no time lag, indicating sudden increase in solar wind density and velocity due to IP shocks result in a gradual increase in dynamic solar wind pressure and sudden compression from the Earth’s dayside magnetosphere. As a result, acoustic magnetic wave are ejected into the magnetosphere. Key words: Ultra Low Frequency (ULF), Pc Pulsation, Geomagnetic Storm, Magnetosphere.

To cite this abstract, use the following reference: https://anpaglobal.org/conference/2023/ANPA2023-N0008