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Title: Association Between EMIC Wave Occurrence and Enhanced Convection Periods During Ion Injections

Journal Article · · Geophysical Research Letters
 [1];  [2];  [3];  [3];  [4]; ORCiD logo [5];  [1]
  1. Indian Institute of Geomagnetism, Navi Mumbai (India)
  2. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  3. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States). Center For Space Science and Engineering Research
  4. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States); Aerospace Corp., Chantilly, VA (United States)
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
+ Show Author Affiliations

Electromagnetic ion cyclotron (EMIC) waves tend to occur during geomagnetic storms and solar wind pressure pulses. However, they have also been regularly observed even in the absence of these two drivers. These non-storm time and non-pressure pulse EMIC events are very well associated with individual nightside injections. Nevertheless, not all substorm injections elicit wave activity. Here, we examine the EMIC events excited during two substorm injections on 4 September 2015 and 1 October 2015. We find that injections that are associated with EMIC waves are also associated with enhanced ionospheric convection. The convective signatures occur at local times similar to those of the observed wave activity.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
National Aeronautic and Space Administration (NASA); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1760620
Report Number(s):
LA-UR--20-28112
Journal Information:
Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 3 Vol. 47; ISSN 0094-8276
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
EMIC waves
enhanced convection periods
heliospheric and magnetospheric physics
substorm injections