Results 81 to 90 of about 9,187 (202)
The interaction between transpolar arcs and cusp spots [PDF]
, 2015 Transpolar arcs and cusp spots are both auroral phenomena which occur when the interplanetary magnetic field is northward. Transpolar arcs are associated with magnetic reconnection in the magnetotail, which closes magnetic flux and results in a "wedge ...
Cowley S. W. H. +9 more
core +2 more sources
The flow of plasma in the solar terrestrial environment [PDF]
The overall goal of our NASA Theory Program is to study the coupling, time delays, and feedback mechanisms between the various regions of the solar-terrestrial system in a self-consistent, quantitative, manner. To accomplish this goal, it will eventually
Schunk, Robert W.
core +4 more sources
Downward auroral currents from the reconnection Hall-region [PDF]
, 2011 We present a simple (stationary) mechanism capable of generating the auroral downward field-aligned electric field {that is} needed for {accelerating the ionospheric electron component up into the magnetosphere and confining the ionospheric ions at low ...
Baumjohann, W. +2 more
core +3 more sources
The High Latitude Ionospheric Convection Pattern
Journal of geomagnetism and geoelectricity, 1991 Simple examination of models of the magnetic and electric field indicate that both direct connection with the interplanetary field and connection to the low-latitude boundary layer flow are required to explain many of the repeatable features in the observations of high latitude ionospheric motions.
openaire +2 more sources
Mapping ionospheric backscatter measured by the SuperDARN HF radars - Part 1: A new empirical virtual height model [PDF]
, 2008 Accurately mapping the location of ionospheric backscatter targets (density irregularities) identified by the Super Dual Auroral Radar Network (SuperDARN) HF radars can be a major problem, particularly at far ranges for which the radio propagation paths ...
Chisham, G., Sofko, G. J., Yeoman, T. K.
core
Ionospheric response to the corotating interaction region-driven geomagnetic storm of October 2002 [PDF]
, 2009 Unlike the geomagnetic storms produced by coronal mass ejections (CMEs), the storms generated by corotating interaction regions (CIRs) are not manifested by dramatic enhancements of the ring current. The CIR-driven storms are however capable of producing
Borovsky +33 more
core +1 more source
, 2017 We characterize the response of the quiet time (no substorms or storms) large-scale ionospheric transient equivalent currents to north-south and south-north IMF turnings by using a dynamical network of ground-based magnetometers.
Chapman, S. C. +2 more
core +1 more source
Magnetospheric signatures of ionospheric density cavities observed by cluster [PDF]
, 2015 AJBR ackowledges support from STFC under consolidated grant ST/K000993/1.We present Cluster measurements of large amplitude electric fields corre- lated with intense downward field-aligned currents, observed during a nightside crossing of the auroral ...
Aikio +20 more
core +4 more sources
On the convective instability of the cometary ionosphere
The Astrophysical Journal, 1993 The stability analysis of a cometary ionosphere by Ershkovich, Mchenzie, and Axford is extended to include the effects of plasma motion. In the local inertial frame of reference moving with the plasma we arrived at the same instability criterion, but the Brunt-Vaisala frequency which governs the convective instability now involves the centrifugal force
A. I. Ershkovich, P. L. Israelevich
openaire +1 more source
Disturbances of ionospheric radio channel during magnetic storms in November–December 2023
Solar-Terrestrial PhysicsThis paper presents the results of analysis of oblique ionospheric sounding data obtained with continuous chirp signal on the subauroral paths Magadan—Irkutsk and Norilsk—Irkutsk.
Ponomarchuk S. N., Zolotukhina N. A.
doaj +1 more source