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The Characteristic Response of Whistler Mode Waves to Interplanetary Shocks

Journal Article · · Journal of Geophysical Research. Space Physics
DOI:https://doi.org/10.1002/2017JA024574· OSTI ID:1440491
 [1];  [2];  [3];  [4];  [3];  [3];  [3];  [3];  [5];  [6];  [7];  [8]
  1. Univ. of California, Los Angeles, CA (United States); Univ. Corp. for Atmospheric Research, Boulder, CO (United States)
  2. Univ. of Texas at Dallas, Richardson, TX (United States)
  3. Univ. of California, Los Angeles, CA (United States)
  4. Univ. of California, Los Angeles, CA (United States); Boston Univ., Boston, MA (United States)
  5. Wuhan Univ., Wuhan (China)
  6. Univ. of Iowa, Iowa City, IA (United States)
  7. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Space Sciences Division at the New Mexico Consortium, Los Alamos, NM (United States)
  8. Univ. of New Hampshire, Durham, NH (United States)
+ Show Author Affiliations
Magnetospheric whistler mode waves play a key role in regulating the dynamics of the electron radiation belts. Recent satellite observations indicate a significant influence of interplanetary (IP) shocks on whistler mode wave power in the inner magnetosphere. In this study, we statistically investigate the response of whistler mode chorus and plasmaspheric hiss to IP shocks based on Van Allen Probes and THEMIS satellite observations. Immediately after the IP shock arrival, chorus wave power is usually intensified, often at postmidnight to prenoon sector, while plasmaspheric hiss wave power predominantly decreases near the dayside but intensifies near the nightside. We conclude that chorus wave intensification outside the plasmasphere is probably associated with the suprathermal electron flux enhancement caused by the IP shock. Through a simple ray tracing modeling assuming the scenario that plasmaspheric hiss is originated from chorus, we find that the solar wind dynamic pressure increase changes the magnetic field configuration to favor ray penetration in the nightside and promote ray refraction away from the dayside, potentially explaining the magnetic local time–dependent responses of plasmaspheric hiss waves following IP shock arrivals.
Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
NASA; USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1440491
Report Number(s):
LA-UR--17-31422
Journal Information:
Journal of Geophysical Research. Space Physics, Journal Name: Journal of Geophysical Research. Space Physics Journal Issue: 10 Vol. 122; ISSN 2169-9380
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Prompt Disappearance and Emergence of Radiation Belt Magnetosonic Waves Induced by Solar Wind Dynamic Pressure Variations journal January 2018
Multipoint Observations of Nightside Plasmaspheric Hiss Generated by Substorm‐Injected Electrons journal October 2018
Recent Advancements and Remaining Challenges Associated With Inner Magnetosphere Cross‐Energy/Population Interactions (IMCEPI) journal February 2019

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
Heliospheric and Magnetospheric Physics
IP shocks
MLT dependent
plasmaspheric hiss
ray tracing
whistler mode chorus