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
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 characterize 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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 01, 2023
- Source ID
- 10.1029/2022ja031136
Entities
People
- A. R. Fogg
- Brian J. Anderson
- Harneet Sangha
- Jennifer Carter
- John Malone‐Leigh
- Larry J. Paxton
- Mark Lester
- Matthew K James
- Samuel Wharton
- Sarah Vines
- Steve Milan
- Timothy K Yeoman
- Tom Elsden
Organizations
- Air Force Office of Scientific Research
- Dublin Institute for Advanced Studies
- Irish Research Council
- Johns Hopkins University
- National Aeronautics and Space Administration
- National Science Foundation
- Royal Society
- Science and Technology Facilities Council
- Trinity College Dublin
- University of Alabama in Huntsville
- University of Leicester
- University of St Andrews