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Interplanetary consequences caused by the extremely intense solar activity during October-November 2003
Kojima, Masayoshi; Tokumaru, Munetoshi; Fujiki, Ken'ichi +2 more
We report interplanetary scintillation (IPS) measurements made by the 327 MHz four-station system of the Solar-Terrestrial Environment Laboratory of Nagoya University, during 21 October to 8 November 2003. In this period, solar activity increased greatly owing to the appearance of huge eruptive sunspots on the solar disk. Interplanetary (IP) distu…
Relation between the solar wind dynamic pressure at Voyager 2 and the energetic particle events at Voyager 1
Wang, C.; Richardson, J. D.; Stone, E. C. +2 more
Starting in 2001, Voyager 1 observed three events characterized by enhanced fluxes of energetic particles. These events suggest that Voyager 1 made a close approach to, or a crossing of, the termination shock. Although the plasma experiment on Voyager 1 is not providing useful data, plasma data from Voyager 2 may shed light on the plasma condition…
Modeling the solar energetic particle events in closed structures of interplanetary magnetic field
Torsti, J.; Kocharov, L.; Huttunen-Heikinmaa, K. +1 more
We undertook a numerical modeling of the solar energetic particle (SEP) event inside a loop-like magnetic cloud in the solar wind. Particles accelerated near the Sun are injected into the cloud of a previous coronal mass ejection (CME) that already has expanded through 1 AU. In the framework of focused transport, we perform Monte Carlo simulations…
Ionospheric signatures of plasma injections in the cusp triggered by solar wind pressure pulses
Cerisier, Jean-Claude; Marchaudon, AuréLie; Bosqued, Jean-Michel +7 more
We describe coordinated observations made on 14 July 2001 simultaneously in the midaltitude cusp by Cluster and at the cusp's ionospheric magnetic footprint by Super Dual Auroral Radar Network (SuperDARN) and Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) during a period of three successive solar wind dynamic pressure pulses. In asso…
Energetic particle observations from the Ulysses COSPIN instruments obtained during the October-November 2003 events
Dalla, S.; Kunow, H.; Heber, B. +7 more
We report comprehensive observations of solar energetic particle intensities at energies from 0.3 to >100 MeV made by the suite of six Ulysses COSPIN energetic charged particle instruments on the Ulysses spacecraft during the period of intense solar activity in October/November 2003. We also discuss observations of particle anisotropies in sele…
Whistlers observed by the Cluster spacecraft outside the plasmasphere
Gurnett, D. A.; Pickett, J. S.; Inan, U. S. +4 more
Lightning generated whistlers are ubiquitous within the plasmasphere at both high and low altitudes, and these waves propagate efficiently in both ducted and nonducted modes. On the other hand, in the magnetospheric region outside the plasmasphere, lightning-generated whistlers are commonly observed at low altitudes (up to ∼6000 km) but only rarel…
Auroral kilometric radiation and magnetosphere-ionosphere coupling process during magnetic storms
Misawa, H.; Tsuchiya, F.; Morioka, A. +8 more
This paper presents an investigation of a magnetosphere-ionosphere (M-I) coupling process during magnetic storms, using observations of auroral kilometric radiation (AKR) in the field-aligned acceleration region and plasma density variation in the plasma sheet. The main phase electron precipitation, which AKR does not accompany, was confirmed as n…
Narrowband Z-mode emissions interior to Saturn's plasma torus
Gurnett, D. A.; Kurth, W. S.; Kaiser, M. L. +3 more
During Cassini's close approach to Saturn, on 1 July 2004, a set of narrow bandwidth plasma emissions were detected by the Radio and Plasma Wave Science (RPWS) instrument in the inner magnetosphere. These discrete tones were detected between 3 and 70 kHz, with individual tone bandwidths as low as a few hundred Hertz. The tones persisted for long t…
Planetary foreshock radio emissions
Cairns, Iver H.; Kuncic, Zdenka
The electron foreshock regions upstream of Earth's bow shock and upstream of traveling interplanetary shocks are known to be propitious sites for a variety of energetic particle and plasma wave phenomena, including radio emissions. A quantitative theoretical model has been developed for radio emissions associated with the terrestrial foreshock and…
Time variations of cosmic ray electrons and nuclei between 1978 and 2004: Evidence for charge-dependent modulation organized by changes in solar magnetic polarity and current sheet tilt
Heber, B.; Webber, W. R.; Lockwood, J. A.
We have examined the 52-day average intensities of 1.2-GV electrons and positively charged nuclei of the same rigidity during the time period from 1978 to 2004. This time period covers a complete 22-year solar cycle plus data from 2000 to 2004 that can be used to examine the repetitive nature of the variations. The 11-year solar modulation changes…