Results 31 to 40 of about 7,217 (205)

Prelude to THEMIS tail conjunction study [PDF]

Annales Geophysicae, 2007
A close conjunction of several satellites (LANL, GOES, Polar, Geotail, and Cluster) distributed from the geostationary altitude to about 16 RE downstream in the tail occurred during substorm activity as indicated by global auroral imaging and ground ...
A. T. Y. Lui, Y. Zheng, Y. Zhang, V. Angelopoulos, G. K. Parks, F. S. Mozer, H. Rème, L. M. Kistler, M. W. Dunlop, G. Gustafsson, M. G. Henderson   +10 more
doaj   +1 more source

Correlation between ground-based observations of substorm signatures and magnetotail dynamics [PDF]

Annales Geophysicae, 2005
We present a substorm event study using the four Cluster spacecraft in combination with ground-based instruments, in order to perform simultaneous observations in the ionosphere and magnetotail.
E. Borälv, H. J. Opgenoorth, H. J. Opgenoorth, K. Kauristie, M. Lester, J.-M. Bosqued, J. P. Dewhurst, C. J. Owen, M. Dunlop, M. Dunlop, J. A. Slavin, A. Fazakerley, C. Perry   +12 more
doaj   +1 more source

Excitation of twin-vortex flow in the nightside high-latitude ionosphere during an isolated substorm [PDF]

, 2002
We present SuperDARN radar observations of the ionospheric flow during a well-observed high-latitude substorm which occurred during steady northward IMF conditions on 2 December 1999.
Watermann, J.F., Sigwarth, J.B., Cowley, S.W.H., Grocott, A., Yeoman, T.K.   +4 more
core   +5 more sources

A substorm in midnight auroral precipitation [PDF]

Annales Geophysicae, 2003
DMSP F7 spacecraft observations for the whole of 1986 were used to construct the empirical model of the midnight auroral precipitation during a substorm.
V. G. Vorobjev, O. I. Yagodkina, G. V. Starkov, Ya. I. Feldstein   +3 more
doaj   +1 more source

SABRE observations of structured ionospheric flows during substorm expansion phase onset [PDF]

Annales Geophysicae, 1994
The irregularity velocity patterns observed by the SABRE coherent radar at substorm expansion phase onset, which is identified by magnetometer observations of Pi2 pulsations, are occasionally highly structured.
E. G. Bradshaw, M. Lester, T. B. Jones
doaj   +1 more source

Statistical study of high-latitude plasma flow during magnetospheric substorms [PDF]

Annales Geophysicae, 2004
We have utilised the near-global imaging capabilities of the Northern Hemisphere SuperDARN radars, to perform a statistical superposed epoch analysis of high-latitude plasma flows during magnetospheric substorms.
G. Provan, M. Lester, S. B. Mende, S. E. Milan   +3 more
doaj   +1 more source

Energetic electron precipitation during substorm injection events: High-latitude fluxes and an unexpected midlatitude signature [PDF]

, 2008
Geosynchronous Los Alamos National Laboratory (LANL-97A) satellite particle data, riometer data, and radio wave data recorded at high geomagnetic latitudes in the region south of Australia and New Zealand are used to perform the first complete modeling ...
Menk, F. W., Menk, F.W., Neil. R. Thomson, Brundell, J.B., Annika Seppälä, John Bähr, Reiner H. W. Friedel, Neil Cobbett, Tracy Moffat‐Griffin, Andrew J. Kavanagh, Craig J. Rodger, Brundell, J., Kavanagh, Andrew J., Rodger, C. J., James Brundell, Seppälä, A., Kavanagh, A.J., Friedel, R.H.W., Thomson, N. R., Bähr, J., Clilverd, M. A., Rodger, C.J., Friedel, R. W. H., Moffat-Griffin, T., Thomson, N.R., Frederick W. Menk, Cobbett, N., Clilverd, M.A., Mark A. Clilverd   +28 more
core   +5 more sources

Statistical visualization of the Earth's magnetotail and the implied mechanism of substorm triggering based on superposed-epoch analysis of THEMIS data [PDF]

Annales Geophysicae, 2014
To investigate the physical mechanism responsible for substorm triggering, we performed a superposed-epoch analysis using plasma and magnetic-field data from THEMIS probes. Substorm onset timing was determined based on auroral breakups detected by all-
S. Machida, Y. Miyashita, A. Ieda, M. Nosé, V. Angelopoulos, J. P. McFadden   +5 more
doaj   +1 more source

Transition from substorm growth to substorm expansion phase as observed with a radial configuration of ISTP and Cluster spacecraft [PDF]

, 2005
International audienceTransition from the growth phase to the substorm expansion during a well-isolated substorm with a strong growth phase is investigated using a unique radial (THEMIS-like) spacecraft constellation near midnight, including the probing ...
Sergeev, V.A., T. Nagai, Kubyshkina, M. V., Slavin, J., Nagai, T., Klecker, B., Mende, S., Thomsen, M., Pulkkinen, T., Slavin, J.A., Sergeev, V. A., Sauvaud, J.-A., V. Angelopoulos, Kubyshkina, M., Thomsen, M.F., S. B. Mende, V. A. Sergeev, Kubyshkina, M.V., Amm, O., Sauvaud, J., J.-A. Sauvaud, Nakamura, R., Mende, S.B., O. Amm, T. Pulkkinen, Baumjohann, W., Thomsen, M. F., Sergeev, V., Angelopoulos, V., Slavin, J. A., M. V. Kubyshkina, J. A. Slavin, M. F. Thomsen, Mende, S. B., B. Klecker, W. Baumjohann, R. Nakamura   +36 more
core   +2 more sources

Non-triggered auroral substorms and long-period (1–4 mHz) geomagnetic and auroral luminosity pulsations in the polar cap [PDF]

Annales Geophysicae, 2017
A study is undertaken into parameters of the polar auroral and geomagnetic pulsations in the frequency range 1–4 mHz (Pc5∕Pi3) during quiet geomagnetic intervals preceding auroral substorms and non-substorm background variations.
N. Yagova, N. Nosikova, N. Nosikova, L. Baddeley, L. Baddeley, L. Baddeley, O. Kozyreva, D. A. Lorentzen, D. A. Lorentzen, D. A. Lorentzen, V. Pilipenko, V. Pilipenko, M. G. Johnsen   +12 more
doaj   +1 more source