[PDF] Top 20 ANGEO - Pc3 pulsations during variable IMF conditions
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ANGEO - Pc3 pulsations during variable IMF conditions
... Abstract. Pc3 geomagnetic ®eld ¯uctuations detected at low latitude (L'Aquila, Italy) during the passage of a high velocity solar wind stream, characterized by vari- able interplanetary magnetic ®eld ... See full document
7
ANGEO - An analysis of Pc3 and Pc4 pulsations at Terra Nova Bay (Antarctica)
... preferentially during daytime hours, have typical ampli- tudes remarkably smaller than regular Pc3 and provide a signi®cant contribution to the average power spectrum during highly perturbed days ... See full document
10
Spectral structure of Pc3–4 pulsations: possible signatures of cavity modes
... spectra. During this interval the estimated UW frequency had increased to 6 · B IMF ∼ 57 ...as variable power between 70 and 80 mHz in the MESA H and D com- ponent spectra and as a broad peak in the ... See full document
19
ANGEO - Polar ionospheric responses to solar wind IMF changes
... We have examined the solar wind eects on the polar ionosphere during a 4-day period in January, 1998 when the solar wind IMF was quite strong and highly variable. The ionospheric parameters studied ... See full document
11
Multi-instrument study of the dynamic cusp during dominant IMF conditions
... with variable electric field behaviour, which may be caused by wave activity in the Pc1/2 frequency band generated in the equatorial plane at the magnetopause ... See full document
16
Cluster observations of a complex high-altitude cusp passage during highly variable IMF
... plasma conditions are consistent with observations of the cusp region (Rae et ...seen during the transition from lobe to cusp in the OVERLAP density plot in panel 8, ... See full document
13
ANGEO - Upstream waves and field line resonances: simultaneous presence and alternation in Pc3 pulsation events
... are pulsations with periods inconsistent with these two mechanisms, ...the IMF, but with a relation dierent from the normal one (here 237/B instead of ...20° during this interval, with a maximum of ... See full document
15
Meridional motions of the afternoon radar aurora, auroral electrojets, and absorption patches under variable IMF conditions
... During the first half of the period under study, the absorp- tion features moved in the meridional direction with veloci- ties that were very close to those observed in the radar aurora and equivalent currents, ... See full document
16
ANGEO - Reconfiguration and closure of lobe flux by reconnection during northward IMF: possible evidence for signatures in cusp/cleft auroral emissions
... the IMF was both strongly southward and strongly ...northward IMF conditions (Carbary and Meng, 1988; Newell and Meng, ...of IMF B z but also depends on other ... See full document
16
ANGEO - ESR and EISCAT observations of the response of the cusp and cleft to IMF orientation changes
... of enhanced electron temperature shown in the second panel of Fig. 2. Although a complete understanding of the phenom- enon is still lacking, there is a consensus that regions in which the width of the HF radar ... See full document
18
ANGEO - Concerning the generation of geomagnetic giant pulsations by drift-bounce resonance ring current instabilities
... 1978. During the time interval discussed the satellite was located at 37 eastern geographic longitude; local time onboard GEOS-2 corresponds to UT+150 ...Kp conditions with a Tsyganenko-magneto- spheric ... See full document
13
ANGEO - Interhemispheric observations of nightside ionospheric electric fields in response to IMF Bz and By changes and substorm pseudobreakup
... for IMF magnitude 0 < B tot < 4 nT, B z negative condi- ...an IMF-driven model is chosen in order to ensure that the calculated pattern is not directly in¯uenced by any variations in the IMF- driven ... See full document
11
ANGEO - Hydromagnetic spectroscopy of the magnetosphere with Pc3 geomagnetic pulsations along the 210° meridian
... common Pc3±4 pulsations possess complicated spectral ...of Pc3±4 frequency by the magnitude of interplanetary magnetic ®eld (IMF), other studies, including most satellite observations, have ... See full document
13
Nighttime Pc3 pulsations: MM100 and MAGDAS observations
... night Pc3 occurrence rates and local geomagnetic activity at two station pairs: BEL-TAR in Europe and KAT-ADL in ...and Pc3 occurrence P are given in Table ... See full document
17
The structure of low-latitude Pc3 pulsations observed by CHAMP and on the ground
... a Pc3 geomagnetic pulsation event at a time when the CHAMP satellite passed over the HER ground ...that Pc3–4 wave energy is transported through compressional fluctuations, confirming previous ... See full document
11
Magnetohydrodynamic waveguide/resonator for Pc3 ULF pulsations at cusp latitudes
... ULF Pc3 pulsations in the cusp ...band-limited Pc3 spectra could be the result of the convolution of the typi- cal magnetosheath spectrum with cutoff frequency with the frequency decaying conversion ... See full document
8
ANGEO - Auroral pulsations and accompanying VLF emissions
... The authors proposed that these ducts have long lifetime and they can be transported by convection far from the source region. The same convection drift velocity is seen in most cases of pulsating auroral forms (Tagirov ... See full document
13
ANGEO - Nonstationary pearl pulsations as a signature of magnetospheric disturbances
... Pc1 pulsations and shown that nonstationary Pc1s are related to simultaneous magnetic ...increase during early morning and late evening hours. The behaviour of s during the events also agrees with ... See full document
6
A study of L-dependent Pc3 pulsations observed by low Earth orbiting CHAMP satellite
... region during Pc3 pulsation activities of 13 February 2002 (solid line) and 18 February 2003 (dashed ...magnetic pulsations in South Africa, namely at Hermanus (HER) (34 ◦ 25 0 S, 19 ◦ 13 0 E) and ... See full document
8
Source biases in midlatitude magnetotelluric transfer functions due to Pc3 4 geomagnetic pulsations
... However, there are many sites over resistive areas where biases in the Pc3-4 band are not clear. Furthermore, in the western USA, stations that appear most affected are often on the edges of, rather than directly ... See full document
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