Results 261 to 270 of about 88,657 (281)

Magnetospheric Response to a Hot Flow Anomaly

1999
On July 24, 1996, Interball-1 was nominally located outside the dayside bow shock. For a few moments, the magnetopause moved outward to engulf the spacecraft. Wind observations provide no evidence for any corresponding perturbation in solar wind plasma parameters, although they do provide evidence for the passage of a tangential discontinuity.
D. G. Sibeck, N. L. Borodkova
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Hot flow anomaly formation and evolution: Cluster observations

Journal of Geophysical Research: Space Physics, 2013
In this study, we have examined the formation and evolution of 513 hot flow anomalies (HFAs) from 2003 to 2009 observed by the Cluster spacecraft. Our results show that an original upstream discontinuity in the vicinity of an HFAs and/or at least one side of the HFA with the convective electric field pointing toward the discontinuity may help an HFA ...
Shan Wang, Qiugang Zong, Hui Zhang
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Observational test of a hot flow anomaly formation mechanism

Journal of Geophysical Research: Space Physics, 1990
Hot flow anomalies (HFAs) are unique plasma structures observed in the vicinity of the Earth's bow shock. They are typically characterized by high temperature plasma which is strongly deflected relative to the solar wind and flanked by shock‐like density and magnetic field enhancements.
T. G. Onsager, M. F. Thomsen, J. T. Gosling, S. J. Bame   +3 more
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Hot flow anomalies near the Earth's bow shock

Advances in Space Research, 1995
Abstract The discovery in 1984/85 of short intervals (a few minutes) near to the Earth's bow shock of very hot plasma flowing roughly perpendicular to the nominal solar wind direction sparked some intrigue as to the underlying cause(es) and local process(es). Typical characteristics of these events, now known as Hot Flow Anomalies (HFAs), include one
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Statistical Properties of Hot Flow Anomalies around Mars

2023
Hot flow anomalies (HFAs) are not only a terrestrial, but also a solar-system-wide phenomenon that could cause strong perturbations of the planetary magnetosphere and ionosphere. Based on the observations of Mars Atmosphere and Volatile EvolutioN (MAVEN) upstream of the Martian bow shock from 2014 to 2020, we have investigated the statistical ...
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The structure of hot flow anomalies in the magnetosheath

Advances in Space Research, 2002
Abstract The interaction of the solar wind with the Earth's magnetosphere creates a population of backstreaming ions. When a tangential discontinuity contacts the bow shock, these ions can be focused to the discontinuity region and create so-called Hot Flow Anomalies (HFAs) - diamagnetic cavities filled with hot, tenuous, and deflected plasma ...
J. Šafránková, L. Přech, Z. Němeček, D. Sibeck   +3 more
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Hot Flow Anomalies Delimiting Traveling Foreshocks

Transient upstream mesoscale structures (TUMS) are an important topic in the field of research of the near-Earth environment. These events form upstream of the Earth's bow shock and can perturb regions downstream it, i.e. magnetosheath and magnetopause.
Primoz Kajdic, Xochitl Blanco-Cano, Diana Rojas Castillo, Martin Archer, Lucile Turc, Yann Pfaum-Kempf, Adrian LaMoury, Terry Liu, Savvas Raptis, Marcos Vinicius, Sun Lee, Yao Shutao, Yufei Hao, David Sibeck, Hui Zhang, Nojan Omidi, Boyi Wang, Yu Lin, Philippe Escoubet   +18 more
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Propagation properties of Hot Flow Anomalies at Mars: MAVEN observations

Planetary and Space Science, 2019
Abstract We present a statistical study of propagation characteristics of Hot Flow Anomalies (HFAs) at Mars based on 19 manually selected events registered by the NASA Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft. Based on the number of registered events during the observed time interval we conclude that HFAs are common foreshock ...
S.D. Shuvalov, V.N. Ermakov, V.O. Zorina, K.I. Kim   +3 more
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Hybrid simulation of the formation of a hot flow anomaly

Journal of Geophysical Research: Space Physics, 1991
Results are presented from two‐dimensional hybrid simulations of the interaction of a supercritical quasi‐perpendicular collisionless shock wave with current sheets embedded in the upstream flow. The current sheet normals are perpendicular to the shock normal.
V. A. Thomas, D. Winske, M. F. Thomsen, T. G. Onsager   +3 more
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Spontaneous Hot Flow Anomalies at Earth’s foreshock.

In recent years we have learnt that foreshock transients play an influential role in solar wind coupling with Earth’s magnetosphere. These transients include Spontaneous Hot Flow Anomalies (SHFAs) which are characterized by dips in magnetic field magnitude and ion density, enhanced temperature, and are surrounded by ultra low frequency waves.
Xochitl Blanco-Cano, Diana Rojas-Castillo, Primoz Kajdic   +2 more
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