Association Between EMIC Wave Occurrence and Enhanced Convection Periods During Ion Injections | Zendy

Remya B. | Zendy; Sibeck D. G. | Zendy; Ruohoniemi J. M. | Zendy; Kunduri B. | Zendy; Halford A. J. | Zendy; Reeves G. D. | Zendy; Reddy R. V. | Zendy

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

Author(s) -

Remya B.,

Sibeck D. G.,

Ruohoniemi J. M.,

Kunduri B.,

Halford A. J.,

Reeves G. D.,

Reddy R. V.

Publication year - 2020

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/2019gl085676

Subject(s) - substorm , emic and etic , geophysics , convection , geomagnetic storm , storm , atmospheric sciences , ionosphere , solar wind , physics , van allen probes , geology , magnetosphere , meteorology , plasma , van allen radiation belt , nuclear physics , sociology , anthropology

Abstract 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 (Remya et al., 2018, https://doi.org/10.1029/2018JA025354 ). Nevertheless, not all substorm injections elicit wave activity. 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.

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