Results 181 to 190 of about 1,718 (220)

Origin of strong interplanetary shocks

Nature, 1985
Observations of 900 radio sources have been used to study the shape and motion of large-scale interplanetary transients associated with shock disturbances at 1 AU. The variations of plasma density and speed and the zones in the solar atmosphere from which the transients originate suggest an origin related to intermittent flows of enhanced speed from ...
A. Hewish, S. J. Tappin, G. R. Gapper
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The evolution of interplanetary shocks

Journal of Geophysical Research: Space Physics, 1985
Unambiguous identification of the solar events associated with 48 interplanetary (IP) shocks has been facilitated by the observation of radio emission generated by the shocks. This identification makes possible an investigation of the way in which these shocks evolve and of the relationship between solar event “strength” and shock velocity. All but two
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Propagation of Interplanetary Shocks Across the Bow Shock

AIP Conference Proceedings, 2010
An important problem of the Space Weather Program is the interaction of interplanetary (IP) shocks with the Earth magnetosphere because their interaction often (but not always) leads to major geomagnetic storms. Since the huge interaction region can be covered by simultaneous spacecraft observations only sporadically, global MHD modeling can help in ...
Zdeněk Nem̌ecěk, Jana Šafránková, Lubomír Přech, Andriy Koval, Jan Merka, M. Maksimovic, K. Issautier, N. Meyer-Vernet, M. Moncuquet, F. Pantellini   +9 more
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Slow shocks in the interplanetary medium

Journal of Geophysical Research, 1977
The production of MHD shock ensembles in the solar wind will, in general, result in slow forward and reverse shocks in addition to fast forward and reverse shocks and a contact discontinuity. As opposed to fast shocks, which last for an extended period of time, slow shocks disappear in two stages.
Philip Rosenau, S. T. Suess
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Evolution and interaction of interplanetary shocks

Journal of Geophysical Research: Space Physics, 1985
The paper presents a computer simulation for the evolution and interaction of shocks resulting from large interplanetary streams based on multispacecraft observations and an unsteady, one‐dimensional, MHD model. We studied two events, each observed by two or more spacecraft separated by a distance of the order of 10 AU and consisting of a sequence of ...
Y. C. Whang, L. F. Burlaga
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STEREO interplanetary shocks and foreshocks

AIP Conference Proceedings, 2013
We use STEREO data to study shocks driven by stream interactions and the waves associated with them. During the years of the extended solar minimum 2007-2010, stream interaction shocks have Mach numbers between 1.1-3.8 and θBn ∼20-86°. We find a variety of waves, including whistlers and low frequency fluctuations.
X. Blanco-Cano, P. Kajdič, E. Aguilar-Rodríguez, C. T. Russell, L. K. Jian, J. G. Luhmann   +5 more
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Ionospheric Response to the Interplanetary Shock

AIP Conference Proceedings, 2008
The Cluster spacecraft and ground-based Digisonde network observed on November 7, 2004 a strong interplanetary shock interaction with Earth's magnetosphere which initiated a strong magnetic storm with Dst = −373 nT. When the interplanetary shock encountered the Earth system, the Cluster fleet was traveling in the inner magnetosphere region (L shell = 4.
Q.-G. Zong, B. W. Reinisch, P. Song, I. Galkin, X. J. Liu, Paul Song, John Foster, Michael Mendillo, Dieter Bilitza   +8 more
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Observations of interplanetary shocks: Recent progress

Space Science Reviews, 1983
Interplanetary shock observations since the prior Solar Terrestrial Physics Symposium in 1978 are reviewed. Since the interval coincides with the recent solar maximum, emphasis is placed on shocks associated with transient solar phenomena, including coronal transients and eruptive prominences as well as flares.
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Generation and Evolution of Interplanetary Shocks

AIP Conference Proceedings, 2009
Timing and locating interplanetary (IP) shocks in the heliosphere constitutes a major task in space weather forecasting, as they are source of solar energetic particles and the leading signal of an upcoming magnetic cloud/interplanetary coronal mass ejection (MC/ICME) that causes major geomagnetic and aurora disturbances.
Chin-Chun Wu, Xianzhi Ao, Gary Zank Ross Burrows   +2 more
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Bow shock and its interaction with interplanetary shocks

Radio Science, 1973
Harbingers of significant magnetospheric motions consist of the interactions of interplanetary discontinuities with the standing bow shock. The most common discontinuity is the tangential discontinuity. Less frequent in occurrence, but of major significance to subsequent magnetospheric dynamics, is the flare‐generated interplanetary shock wave and its ...
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