TY - JOUR

T1 - Fast earthward flows, electron cyclotron harmonic waves, and diffuse auroras: Conjunctive observations and a synthesized scenario

AU - Liang, Jun

AU - Ni, B.

AU - Spanswick, E.

AU - Kubyshkina, M.

AU - Donovan, E. F.

AU - Uritsky, V. M.

AU - Thorne, R. M.

AU - Angelopoulos, V.

PY - 2011

Y1 - 2011

N2 - We present in this paper multi-instrumental observations and analyses of fast earthward flows, electrostatic electron cyclotron harmonic (ECH) waves, and diffuse auroras, during 8–9 UT on February 5, 2009. The event began with a series of fast earthward flows detected on mid-tail probe THEMIS-C. Subsequently, magnetic dipolarizations and strong ECH wave intensifications were observed on THEMIS-D/E probes at L ∼ 11 in the equatorial plasma sheet. Concurrently, Ground optical instruments detected diffuse auroral intensifications in the region surrounding the ionospheric footprints of the THEMIS probes. Together with the theoretical simulation performed by Ni et al. (2011e), we establish a causal conjunction between the ECH waves and diffuse auroras for the reported event. We also propose that the ECH wave and diffuse auroral intensification were likely triggered by the fast flow activity from the mid-tail and its resulting magnetic dipolarization. We discuss possible mechanisms linking the fast flow and its ass

AB - We present in this paper multi-instrumental observations and analyses of fast earthward flows, electrostatic electron cyclotron harmonic (ECH) waves, and diffuse auroras, during 8–9 UT on February 5, 2009. The event began with a series of fast earthward flows detected on mid-tail probe THEMIS-C. Subsequently, magnetic dipolarizations and strong ECH wave intensifications were observed on THEMIS-D/E probes at L ∼ 11 in the equatorial plasma sheet. Concurrently, Ground optical instruments detected diffuse auroral intensifications in the region surrounding the ionospheric footprints of the THEMIS probes. Together with the theoretical simulation performed by Ni et al. (2011e), we establish a causal conjunction between the ECH waves and diffuse auroras for the reported event. We also propose that the ECH wave and diffuse auroral intensification were likely triggered by the fast flow activity from the mid-tail and its resulting magnetic dipolarization. We discuss possible mechanisms linking the fast flow and its ass

U2 - 10.1029/2011JA017094

DO - 10.1029/2011JA017094

M3 - статья

VL - 116

SP - A12220

JO - Journal of Geophysical Research: Biogeosciences

JF - Journal of Geophysical Research: Biogeosciences

SN - 0148-0227

IS - 12

ER -