Multi-instrument observations of the effects of a solar wind pressure pulse on the high latitude ionosphere: a detailed case study of a geomagnetic sudden impulse

Alexandra Fogg*, Mark Lester, Tim Yeoman, Jennifer Carter, Steve Milan, Harneet Sangha, Tom Elsden, S. J. Wharton, Matthew James, J. Malone-Leigh, L. J. Paxton, B. J. Anderson, S. K. Vines

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)
5 Downloads (Pure)

Abstract

The effects of a solar wind pressure pulse on the terrestrial magnetosphere have been observed in detail across multiple datasets. The communication of these effects into the magnetosphere is known as a positive geomagnetic sudden impulse (+SI), and are observed across latitudes and different phenomena to characterise the propagation of +SI effects through the magnetosphere. A superposition of Alfvén and compressional propagation modes are observed in magnetometer signatures, with the dominance of these signatures varying with latitude. For the first time, collocated lobe reconnection convection vortices and region 0 field aligned currents are observed preceding the +SI onset, and an enhancement of these signatures is observed as a result of +SI effects. Finally, cusp auroral emission is observed collocated with the convection and current signatures. For the first time, simultaneous observations across multiple phenomena are presented to confirm models of +SI propagation presented previously.
Original languageEnglish
Article numbere2022JA031136
Number of pages19
JournalJournal of Geophysical Research: Space Physics
Volume128
Issue number3
DOIs
Publication statusPublished - 17 Mar 2023

Keywords

  • Magnetosphere
  • Sudden impulse
  • ULF waves

Fingerprint

Dive into the research topics of 'Multi-instrument observations of the effects of a solar wind pressure pulse on the high latitude ionosphere: a detailed case study of a geomagnetic sudden impulse'. Together they form a unique fingerprint.

Cite this