Results 11 to 20 of about 166,062,727 (217)

Ionospheric flow during extended intervals of northward but BY-dominated IMF [PDF]

, 2003
We present SuperDARN radar observations of the nightside high-latitude ionospheric flow during two 6-hour intervals of quasi-steady northward interplanetary magnetic field (IMF).
S. W. H. Cowley, J. B. Sigwarth, Cowley, S. W. H., A. Grocott, Sigwarth, J.B., Cowley, S.W.H., Sigwarth, J. B., Grocott, A., S.W.H. Cowley (7591226), J.B. Sigwarth (7591229), Adrian Grocott (7590026)   +10 more
core   +5 more sources

Coordinated optical and radar observations of ionospheric pumping for a frequency pass through the second electron gyroharmonic at HAARP [PDF]

, 2007
On 4 February 2005, the High-frequency Active Auroral Research Program (HAARP) facility was operated in O and X mode while pointing into the magnetic zenith to produce artificial optical emissions in the ionospheric F layer. The pump frequency was set to
Senior, Andrew, Pedersen, T., Kosch, Mike J., Bristow, B., Mishin, E., Watkins, B., Hughes, J., Oyama, S.   +7 more
core   +4 more sources

Mesoscale Plasma Convection Perturbations in the High‐Latitude Ionosphere [PDF]

Journal of Geophysical Research: Space Physics, 2018
AbstractAn investigation of flow perturbations with spatial scale sizes between 100 and 500 km in the high‐latitude ionosphere is presented. These localized flow perturbations are deviations from the large‐scale background convection, expected to give us new insights into the magnetosphere‐ionosphere coupling process.
Yun‐Ju Chen, Roderick A. Heelis
openaire   +1 more source

Azimuthal magnetic fields in saturn's magnetosphere: Effects associated with plasma sub-corotation and the magnetopause-tail current system [PDF]

, 2003
We calculate the azimuthal magnetic fields expected to be present in Saturn’s magnetosphere associated with two physical effects, and compare them with the fields observed during the flybys of the two Voyager spacecraft.
S. W. H. Cowley, J. A. Wild (7591442), Cowley, S. W. H., E. J. Bunce, Bunce, E. J., S. W. H. Cowley (7590302), Wild, J. A., J. A. Wild, E. J. Bunce (7590470)   +8 more
core   +6 more sources

Inferring the Evolution of a Large Earthquake From Its Acoustic Impacts on the Ionosphere

AGU Advances, 2021
We investigate the possibility to constrain the evolution of the 2016 M7.8 Kaikoura earthquake evolution based on Global Positioning System signal‐derived ionospheric total electron content (TEC) perturbations, that represent plasma responses to ...
P. A. Inchin, J. B. Snively, Y. Kaneko, M. D. Zettergren, A. Komjathy   +4 more
doaj   +1 more source

Ionospheric electron heating, optical emissions, and striations induced by powerful HF radio waves at high latitudes: Aspect angle dependence [PDF]

, 2003
In recent years, large electron temperature increases of 300% (3000 K above background) caused by powerful HF-radio wave injection have been observed during nighttime using the EISCAT incoherent scatter radar near Tromsø in northern Norway.
Rietveld, M. T., Kosch, Mike J., Leyser, T. B., Blagoveshchenskaya, N. F., Kornienko, V. A., Yeoman, T. K.   +5 more
core   +5 more sources

Severe L-band scintillation over low-to-mid latitudes caused by an extreme equatorial plasma bubble: joint observations from ground-based monitors and GOLD

Earth, Planets and Space, 2023
The occurrence of plasma irregularities and ionospheric scintillation over the Caribbean region have been reported in previous studies, but a better understanding of the source and conditions leading to these events is still needed.
Jonas Sousasantos, Josemaria Gomez Socola, Fabiano S. Rodrigues, Richard W. Eastes, Christiano G. M. Brum, Pedrina Terra   +5 more
doaj   +1 more source

Temporal Characteristic of the Mesoscale Plasma Flow Perturbations in the High‐Latitude Ionosphere [PDF]

Journal of Geophysical Research: Space Physics, 2019
AbstractSpatial and temporal characteristics of flow perturbations in the high‐latitude ionosphere are important considerations for energy deposition from the magnetosphere. In this study, we examine the temporal characteristics of plasma flow perturbations with spatial scales between 100 and 400 km from two consecutive Defense Meteorological Satellite
Yun‐Ju Chen, Roderick A. Heelis
openaire   +1 more source

Localized fast flow disturbance observed in the plasma sheet and in the ionosphere [PDF]

, 2005
An isolated plasma sheet flow burst took place at 22:02 UT, 1 September 2002, when the Cluster footpoint was located within the area covered by the Magnetometers-Ionospheric Radars-All-sky Cameras Large Experiment (MIRACLE). The event was associated with
A. Balogh (7591361), Laakso, H., H. Rème, Balogh, A., Klecker, B., N.C. Draper (7591352), Mccrea, I. W., H. Laakso (7591349), Draper, N. C., Adrian Grocott (7590026), A. Grocott, M. André (3683134), Amm, O., McCrea, I., Rème, H., André, M., H. Laakso, Nakamura, R., Draper, N., O. Amm, Lester, M., H. Rème (7591274), I. W. McCrea, Grocott, A., M. Lester, R. Nakamura (7591343), A. Balogh, M. Lester (7589660), M. André, N. C. Draper, I.W. McCrea (7591358), B. Klecker, B. Klecker (7591355), O. Amm (7591346), R. Nakamura   +34 more
core   +6 more sources

Ionospheric response to magnetar flare: signature of SGR J1550–5418 on coherent ionospheric Doppler radar [PDF]

Annales Geophysicae, 2017
This paper presents observational evidence of frequent ionospheric perturbations caused by the magnetar flare of the source SGR J1550–5418, which took place on 22 January 2009.
A. Mahrous
doaj   +1 more source