@Article{SahaiBFJAOSIYHLSGPB:2009:EfObIo,
author = "Sahai, Y. and Becker-Guedes, F{\'a}bio and Fagundes, P. R. and
Jesus, R. de and Abreu, Alessandro Jos{\'e} de and Otsuka, Y. and
Shiokawa, K. and Igarashi, K. and Yumoto, K. and Huang, C. -S. and
Lan, H. T. and Saito, A. and Guarnieri, F. L. and Pillat, V. G.
and Bittencourt, J. A.",
affiliation = "{Universidade do Vale do Para{\'{\i}}ba (UniVap)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Universidade do Vale
do Para{\'{\i}}ba (UniVap)} and {Universidade do Vale do
Para{\'{\i}}ba (UniVap)} and {Universidade do Vale do
Para{\'{\i}}ba (UniVap)} and Solar-Terrestrial Environment
Laboratory, Nagoya University and Solar-Terrestrial Environment
Laboratory, Nagoya University. and National Institute of
Information and Communications Technology, Tokyo, Japan. and Space
Environment Research Center, Kyushu University, Fukuoka, Japan.
and {Massachusetts Institute of Technology (MIT)} and Ho Chi Minh
City Institute of Physics, Vietnamese Academy of Science and
Technology and {Kyoto University} and {Universidade do Vale do
Para{\'{\i}}ba (UniVap)} and {Universidade do Vale do
Para{\'{\i}}ba (UniVap)} and {Instituto Nacional de Pesquisas
Espacias}",
title = "Effects observed in the ionospheric F region in the east Asian
sector during the intense geomagnetic disturbances in the early
part of November 2004",
journal = "Journal of Geophysical Research",
year = "2009",
volume = "114",
pages = "A00A18",
month = "11pp",
keywords = "tempestade geomagn{\'e}tica, camada F ionosf{\'e}rica, setor
asi{\'a}tico, ionospheric F region, Asian sector, geomagnetic
disturbances.",
abstract = "The Sun was very active in the early part of November 2004. During
the period of 810 November 2004, intense geomagnetic disturbances
with two superstorms were observed. In a companion paper
(hereinafter referred to as paper 1), the effects observed in the
F region during the intense geomagnetic disturbances in the early
part of November 2004 in the Latin American sector were presented.
In the present paper, we investigate the effects observed in the F
region during the intense geomagnetic disturbances in the early
part of November 2004 in the east Asian sector.We have used the
ionospheric sounding observations at Ho Chi Minh City (Vietnam)
and Okinawa, Yamagawa, Kokubunji, and Wakkanai (Japan) in the
present investigations. Also, GPS observations in the east Asian
sector (several longitude zones) have been used to study the
effect in the F region during the intense geomagnetic
disturbances. The ion density versus latitudinal variations
obtained by the DMSP F15 satellite orbiting at about 800 km
altitude in the east Asian sector and the magnetic field data
obtained at several stations in the Japanese meridian are also
presented. Several important features from these observations in
both the sectors during this extended period of intense
geomagnetic disturbances are presented. The east Asian sector
showed very pronounced effects during the second superstorm, which
was preceded by two storm enhancements. It should be mentioned
that around the beginning of the night on 10 November, ionospheric
irregularities propagating from higher midlatitude region to
low-latitude region were observed in the Japanese sector. The most
intense geomagnetic field H component in that sector was observed
on 10 November at L = 2.8, indicating that the auroral oval and
the heating got further to low latitudes and the ionospheric
irregularities observed in the Japanese sector on this night are
midlatitude ionospheric disturbances associated with the second
superstorm. The absence of ionospheric irregularities in the
Japanese sector during the 8 November superstorm suggests that the
magnetosphere-ionosphere system was possibly preconditioned
(primed) when the second interplanetary structure impacted the
magnetosphere.",
doi = "10.1029/2008JA013053",
url = "http://dx.doi.org/10.1029/2008JA013053",
issn = "0148-0227",
label = "lattes: 1588982182134967 2 SahaiBFJAOSIYHLSGPB:2009:EfObIo",
language = "en",
targetfile = "jgra19319.pdf",
urlaccessdate = "16 jun. 2024"
}