Search Results - "KEILING, A"

Statistical Properties and Proposed Source Mechanism of Recurrent Substorm Activity With One‐Hour Periodicity by Keiling, A., Ramos, C., Vu, N., Angelopoulos, V., Nosé, M.

“…Substorm activity, due to either substorms or substorm‐associated disturbances, shows two preferred recurrent intervals for periodic events. While the longer…”
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Substorm current wedge driven by plasma flow vortices: THEMIS observations by Keiling, A., Angelopoulos, V., Runov, A., Weygand, J., Apatenkov, S. V., Mende, S., McFadden, J., Larson, D., Amm, O., Glassmeier, K.-H., Auster, H. U.

“…A multipoint analysis of conjugate magnetospheric and ionospheric flow vortices during the formation of the substorm current wedge (SCW) on 19 February 2008 is…”
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Magnetosphere-ionosphere coupling of global Pi2 pulsations by Keiling, A., Marghitu, O., Vogt, J., Amm, O., Bunescu, C., Constantinescu, V., Frey, H., Hamrin, M., Karlsson, T., Nakamura, R., Nilsson, H., Semeter, J., Sorbalo, E.

“…Global Pi2 pulsations have mainly been associated with either low/middle latitudes or middle/high latitudes and, as a result, have been treated as two…”
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Simultaneous THEMIS in situ and auroral observations of a small substorm by Donovan, E., Liu, W., Liang, J., Spanswick, E., Voronkov, I., Connors, M., Syrjäsuo, M., Baker, G., Jackel, B., Trondsen, T., Greffen, M., Angelopoulos, V., Russell, C. T., Mende, S. B., Frey, H. U., Keiling, A., Carlson, C. W., McFadden, J. P., Glassmeier, K.-H., Auster, U., Hayashi, K., Sakaguchi, K., Shiokawa, K., Wild, J. A., Rae, I. J.

“…We present ground‐based and in situ observations from March 13, 2007. The THEMIS satellites were in the evening sector conjugate to THEMIS ground‐based…”
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Alfvén waves and Poynting flux observed simultaneously by Polar and FAST in the plasma sheet boundary layer by Dombeck, J., Cattell, C., Wygant, J. R., Keiling, A., Scudder, J.

“…We present the first simultaneous observations of Alfvén waves at Polar and FAST altitudes, ∼7 RE geocentric and ∼3500 km, respectively, at ∼23 MLT in the main…”
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Observation and modeling of the injection observed by THEMIS and LANL satellites during the 23 March 2007 substorm event by Liu, W. L., Li, X., Sarris, T., Cully, C., Ergun, R., Angelopoulos, V., Larson, D., Keiling, A., Glassmeier, K. H., Auster, H. U.

“…During the encounter of a substorm on 23 March 2007, the THEMIS constellation observed energetic particle injections and dipolarizations in the premidnight…”
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Multiple harmonic ULF waves in the plasma sheet boundary layer observed by Cluster by Engebretson, M. J., Kahlstorf, C. R. G., Posch, J. L., Keiling, A., Walsh, A. P., Denton, R. E., Broughton, M. C., Owen, C. J., Fornaçon, K.-H., Rème, H.

“…The passage of the Cluster satellites in a polar orbit through Earth's magnetotail has provided numerous observations of harmonically related Pc 1–2 ULF wave…”
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Evidence for kinetic Alfvén waves and parallel electron energization at 4–6 RE altitudes in the plasma sheet boundary layer by Wygant, J. R., Keiling, A., Cattell, C. A., Lysak, R. L., Temerin, M., Mozer, F. S., Kletzing, C. A., Scudder, J. D., Streltsov, V., Lotko, W., Russell, C. T.

“…We present evidence based on measurements from the Polar spacecraft for the existence of small‐scale, large‐amplitude kinetic Alfvén waves/spikes at the plasma…”
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Evidence for kinetic Alfvén waves and parallel electron energization at 4–6 R E altitudes in the plasma sheet boundary layer by Wygant, J. R., Keiling, A., Cattell, C. A., Lysak, R. L., Temerin, M., Mozer, F. S., Kletzing, C. A., Scudder, J. D., Streltsov, V., Lotko, W., Russell, C. T.

“…We present evidence based on measurements from the Polar spacecraft for the existence of small‐scale, large‐amplitude kinetic Alfvén waves/spikes at the plasma…”
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The Global Morphology of Wave Poynting Flux: Powering the Aurora by Keiling, A., Wygant, J. R., Cattell, C. A., Mozer, F. S., Russell, C. T.

“…Large-scale, electric currents flowing along magnetic field lines into the polar regions of Earth are thought to be the main contributors of the energy that…”
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Low-altitude electron acceleration due to multiple flow bursts in the magnetotail by Nakamura, R., Karlsson, T., Hamrin, M., Nilsson, H., Marghitu, O., Amm, O., Bunescu, C., Constantinescu, V., Frey, H. U., Keiling, A., Semeter, J., Sorbalo, E., Vogt, J., Forsyth, C., Kubyshkina, M. V.

“…At 10:00 UT on 25 February 2008, Cluster 1 spacecraft crossed the near‐midnight auroral zone, at about 2 RE altitude, while two of the Time History of Events…”
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Polar spacecraft based comparisons of intense electric fields and Poynting flux near and within the plasma sheet-tail lobe boundary to UVI images: An energy source for the aurora by Wygant, J. R., Keiling, A., Cattell, C. A., Johnson, M., Lysak, R. L., Temerin, M., Mozer, F. S., Kletzing, C. A., Scudder, J. D., Peterson, W., Whitaker, Ann F.

“…In this paper, we present measurements from two passes of the Polar spacecraft of intense electric and magnetic field structures associated with Alfven waves…”
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Some properties of Alfvén waves: Observations in the tail lobes and the plasma sheet boundary layer by Keiling, A., Parks, G. K., Wygant, J. R., Dombeck, J., Mozer, F. S., Russell, C. T., Streltsov, A. V., Lotko, W.

“…We report properties of substorm‐related, globally excited Alfvén waves on a temporal scale of 6 to 300 s (3.3 to 167 mHz) at geocentric distances between 5…”
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Multiple harmonic ULF waves in the plasma sheet boundary layer: Instability analysis by Denton, R. E., Engebretson, M. J., Keiling, A., Walsh, A. P., Gary, S. P., Décréau, P. M. E., Cattell, C. A., Rème, H.

“…Multiple‐harmonic electromagnetic waves in the ULF band have occasionally been observed in Earth's magnetosphere, both near the magnetic equator in the outer…”
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Multiple intensifications inside the auroral bulge and their association with plasma sheet activities by Keiling, A., Angelopoulos, V., Larson, D., McFadden, J., Carlson, C., Fillingim, M., Parks, G., Frey, S., Glassmeier, K.-H., Auster, H. U., Magnes, W., Liu, W., Li, X.

“…In this coordinated ground and space study, we report multiprobe measurements from Time History of Events and Macroscale Interactions during Substorms…”
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Ultra-low-frequency waves and associated wave vectors observed in the plasma sheet boundary layer by Cluster by Broughton, M. C., Engebretson, M. J., Glassmeier, K.-H., Narita, Y., Keiling, A., Fornaçon, K.-H., Parks, G. K., Rème, H.

“…Waves in the Pc1–Pc2 frequency range (0.1–5 Hz) are studied using Cluster magnetic field data. In the plasma sheet boundary layer, Cluster observed…”
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Correlation of Alfvén wave Poynting flux in the plasma sheet at 4–7 RE with ionospheric electron energy flux by Keiling, A., Wygant, J. R., Cattell, C., Peria, W., Parks, G., Temerin, M., Mozer, F. S., Russell, C. T., Kletzing, C. A.

“…A comparison of Poynting flux in the plasma sheet at geocentric distances of 4–7 RE to the energy flux of magnetically conjugate precipitating electrons at…”
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Correlation of Alfvén wave Poynting flux in the plasma sheet at 4–7 R E with ionospheric electron energy flux by Keiling, A., Wygant, J. R., Cattell, C., Peria, W., Parks, G., Temerin, M., Mozer, F. S., Russell, C. T., Kletzing, C. A.

“…A comparison of Poynting flux in the plasma sheet at geocentric distances of 4–7 R E to the energy flux of magnetically conjugate precipitating electrons at…”
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THEMIS ground-space observations during the development of auroral spirals by KEILING, A, ANGELOPOULOS, V, AUSTER, H. U, WEYGAND, J. M, AMM, O, SPANSWICK, E, DONOVAN, E, MENDE, S, MCFADDEN, J, LARSON, D, GLASSMEIER, K.-H

“…A simultaneous observation of an auroral spiral and its generator region in the near-Earth plasma sheet is rather unlikely. Here we present such observations…”
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Cluster observations of Pc 1–2 waves and associated ion distributions during the October and November 2003 magnetic storms by Engebretson, M.J., Keiling, A., Fornacon, K.-H., Cattell, C.A., Johnson, J.R., Posch, J.L., Quick, S.R., Glassmeier, K.-H., Parks, G.K., Rème, H.

“…Unusual wave activity in the Pc 1–2 frequency band (0.1–5 Hz) was observed by the Cluster spacecraft in association with the two large geomagnetic storms of…”
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