@Article{JesusSGFABNHLP:2012:IoReEq,
author = "Jesus, R. and Sahai, Y. and Guarnieri, F. L. and Fagundes, P. R.
and Abreu, Alessandro Jos{\'e} de and Bittencourt, J. A. and
Nagatsuma, T. and Huang, C. -S. and Lan, H. T. and Pillat, V. G.",
affiliation = "Universidade do Vale do Paraiba (UNIVAP)/IP and D, Avenida
Shishima Hifumi, 2911, Urbanova, 12244-000 S{\~a}o Jos{\'e} dos
Campos, SP, Brazil and Universidade do Vale do Paraiba (UNIVAP)/IP
and D, Avenida Shishima Hifumi, 2911, Urbanova, 12244-000 S{\~a}o
Jos{\'e} dos Campos, SP, Brazil and {} and Universidade do Vale
do Paraiba (UNIVAP)/IP and D, Avenida Shishima Hifumi, 2911,
Urbanova, 12244-000 S{\~a}o Jos{\'e} dos Campos, SP, Brazil and
Universidade do Vale do Paraiba (UNIVAP)/IP and D, Avenida
Shishima Hifumi, 2911, Urbanova, 12244-000 S{\~a}o Jos{\'e} dos
Campos, SP, Brazil and {Instituto Nacional de Pesquisas Espaciais
(INPE)} and National Institute of Information and Communications
Technology (NICT), Koganei, Japan and Institute of Scientific
Research, Boston College, Chestnut Hill, MA, USA and Ho Chi Minh
City Institute of Physics, Vietnamese Academy of Science and
Technology, Ho Chi Minh City, Viet Nam and Universidade do Vale do
Paraiba (UNIVAP)/IP and D, Avenida Shishima Hifumi, 2911,
Urbanova, 12244-000 S{\~a}o Jos{\'e} dos Campos, SP, Brazil",
title = "Ionospheric response of equatorial and low latitude F-region
during the intense geomagnetic storm on 24-25 August 2005",
journal = "Advances in Space Research",
year = "2012",
volume = "49",
number = "3",
pages = "518--529",
month = "Feb.",
keywords = "Atmospheric electricity, Electric fields, Geomagnetism, Holmium,
Joule heating, Magnetosphere.",
abstract = "n this investigation, we present and discuss the response of the
ionospheric F-region in the South American and East Asian sectors
during an intense geomagnetic storm in August 2005. The
geomagnetic storm studied reached a minimum Dst of -216 nT at
12:00 UT on 24 August. In this work ionospheric sounding data
obtained of 24, 25, and 26 August 2005 at Palmas (PAL; 10.2¡Æ S,
48.2¡Æ W; dip latitude 6.6¡Æ S), Sao Jose¢¥ dos Campos (SJC,
23.2¡Æ S, 45.9¡Æ W; dip latitude 17.6¡Æ S), Brazil, Ho Chi Minh
City, (HCM; 10.5¡Æ N, 106.3¡Æ E; dip latitude 2.9¡Æ N), Vietnam,
Okinawa (OKI; 26.3¡Æ N, 127.8¡Æ E; dip latitude 21.2¡Æ N), Japan,
are presented. Also, the GPS observations obtained at different
stations in the equatorial and low-latitude regions in the
Brazilian sector are presented. On the night of 24-25 August 2005,
the h¡{\C{C}}F variations show traveling ionospheric disturbances
associated with Joule heating in the auroral zone from SJC to PAL.
The foF2 variations show a positive storm phase on the night of
24-25 August at PAL and SJC during the recovery phase. Also, the
GPS-VTEC observations at several stations in the Brazilian sector
show a fairly similar positive storm phase on 24 August. During
the fast decrease of Dst (between 10:00 and 11:00 UT) on 24
August, there is a prompt penetration of electric field of
magnetospheric origin that result in abrupt increase (¡12:00 UT)
in foF2 at PAL, SJC (Brazil) and OKI (Japan) and in VTEC at IMPZ,
BOMJ, PARA and SMAR (Brazil). OKI showed strong oscillations of
the F-region on the night 24 August resulted to the propagation of
traveling atmospheric disturbances (TADs) by Joule heating in the
auroral region. These effects result a strong positive observed at
OKI station. During the daytime on 25 August, in the recovery
phase, the foF2 observations showed positive ionospheric storm at
HCM station. Some differences in the latitudinal response of the
F-region is also observed in the South American and East Asian
sectors.",
doi = "10.1016/j.asr.2011.10.020",
url = "http://dx.doi.org/10.1016/j.asr.2011.10.020",
issn = "0273-1177",
label = "self-archiving-INPE-MCTIC-GOV-BR",
language = "en",
targetfile = "Jesus-AdvSpaRes-1-s2.0-S0273117711007538-main[1].pdf",
urlaccessdate = "29 jun. 2024"
}