Results 181 to 190 of about 9,560 (226)

Waves upstream of interplanetary shocks

2023
Interplanetary (IP) shocks can be driven in the solar wind by fast coronal mass ejections and by the interaction of fast solar wind with slow streams of plasma. These shocks can be preceded by extended waves and suprathermal ion foreshocks. Shocks characteristics as well as the level of wave activity near them change as they propagate through the ...
Xochitl Blanco-Cano, Domenico Trotta, Heli Hietala, Primoz Kajdic, Diana Rojas-Castillo, Andrew Dimmock, Tim Horbury, Rami Vainio, Lan Jian   +8 more
openaire   +1 more source

Interaction of interplanetary shocks with the bow shock

Planetary and Space Science, 2007
Abstract Fast forward interplanetary (IP) shocks have been identified as a source of large geomagnetic disturbances. However, the shocks can evolve in the solar wind, they are modified by interaction with the bow shock and during their propagation through the magnetosheath.
J. Šafránková, Z. Němeček, L. Přech, A.A. Samsonov, A. Koval, K. Andréeová   +5 more
openaire   +1 more source

Coronal mass ejections and interplanetary shocks

Journal of Geophysical Research: Space Physics, 1985
A comparison between Solwind observations of coronal mass ejections (CME's) and Helios 1 observations of interplanetary shocks during 1979–1982 indicates that 72% of the shocks were associated with large, low‐latitude mass ejections on the nearby limb.
Sheeley Jr., N., Howard, R., Koomen, M., Michels, D., Schwenn, R., Mühlhäuser, K., Rosenbauer, H.   +6 more
openaire   +2 more sources

Interplanetary shock collisions: Forward with reverse shocks

Astrophysics and Space Science, 1986
When one interplanetary shock overtakes another, the structure that results depends upon the nature of the interacting shocks. We examine, numerically, the results of collisions of forward with reverse shocks, in two dimensions, and show that the results depend primarily upon shock strength.
Z. K. Smith, M. Dryer, S. M. Han
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source