Interhemispheric Observations of ULF Waves Caused by Foreshock Transients Under Quiet Solar Wind Conditions

Authors

Sung Jun Noh, Los Alamos National Laboratory
Hyomin Kim, New Jersey Institute of Technology
Dogacan Ozturk, University of Alaska Fairbanks
Ilya Kuzichev, New Jersey Institute of Technology
Zhonghua Xu, Virginia Polytechnic Institute and State University
Hui Zhang, Shandong University, Weihai
Andrew Vu, University of Alaska Fairbanks
Terry Liu, University of California, Los Angeles
James M. Weygand, University of California, Los Angeles
Michael D. Hartinger, Space Science Institute
Xueling Shi, Virginia Polytechnic Institute and State University
Mark Engebretson, Augsburg University
Andrew Gerrard, New Jersey Institute of Technology
Eun Hwa Kim, Princeton University
Marc Lessard, University of New Hampshire Durham
Christopher T. Russell, University of California, Los Angeles

Document Type

Article

Publication Date

9-1-2023

Abstract

Foreshock transient (FT) events are frequently observed phenomena that are generated by discontinuities in the solar wind. These transient events are known to trigger global-scale magnetic field perturbations (e.g., ULF waves). We report a series of FT events observed by the Magnetospheric Multiscale mission in the upstream bow shock region under quiet solar wind conditions. During the event, ground magnetometers observed significant Pc1 wave activity as well as magnetic impulse events in both hemispheres. Ground Pc1 wave observations show ∼8 min time delay (with some time differences) from each FT event which is observed at the bow shock. We also find that the ground Pc1 waves are observed earlier in the northern hemisphere compared to the southern hemisphere. The observation time difference between the hemispheres implies that the source region of the wave is the off-equatorial region.

Identifier

85170524353 (Scopus)

Publication Title

Journal of Geophysical Research Space Physics

External Full Text Location

https://doi.org/10.1029/2023JA031596

e-ISSN

21699402

ISSN

21699380

Issue

9

Volume

128

Grant

80GSFC17C0018

Fund Ref

National Aeronautics and Space Administration

Recommended Citation

Noh, Sung Jun; Kim, Hyomin; Ozturk, Dogacan; Kuzichev, Ilya; Xu, Zhonghua; Zhang, Hui; Vu, Andrew; Liu, Terry; Weygand, James M.; Hartinger, Michael D.; Shi, Xueling; Engebretson, Mark; Gerrard, Andrew; Kim, Eun Hwa; Lessard, Marc; and Russell, Christopher T., "Interhemispheric Observations of ULF Waves Caused by Foreshock Transients Under Quiet Solar Wind Conditions" (2023). Faculty Publications. 1507.
https://digitalcommons.njit.edu/fac_pubs/1507