TY - JOUR
T1 - Multipoint observation of the response of the magnetosphere and ionosphere related to the sudden impulse event on 19 November 2007
AU - Segarra, Antoni
AU - Nosé, Masahito
AU - Curto, Juan José
AU - Araki, Tohru
N1 - Funding Information:
This research has been supported by Spanish projects CTM2008-03033-E, CTM2009-13843-C02-01 and CTM2010-21312-C03-01 of MINECO. And supported by project 2014 SGR 175 of Generalitat de Catalunya, and the project 2014-URL-Trac-039 of Ramon Llull University - Obra Social “la Caixa”. The results presented in this paper rely on data collected at magnetic observatories. We thank the national institutes that support them and INTERMAGNET for promoting high standards of magnetic observatory practice ( www.intermagnet.org ). We also thank the institutes that maintain the IMAGE Magnetometer Array, Los Alamos National Laboratory spacecraft, THEMIS spacecraft and Cluster spacecraft. We thank NASA’s National Space Science Data Center and Space Physics Data Facility for data usage. The editor thanks two anonymous referees for their assistance in evaluating this paper. This work was supported by Japanese International Exchange Program of National Institute of Information and Communications (NICT). This study was partly supported by the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT), grant-in-aid for Scientific Research (B) (Grant 25287127).
Publisher Copyright:
© A. Segarra et al., Published by EDP Sciences 2015.
PY - 2015
Y1 - 2015
N2 - The aim of this study is to provide a complete scope of a magnetic sudden impulse (SI) event along its way through interplanetary space and the magnetosphere until its arrival to the ground. In our case, we chose the event of 19th November 2007 because of the availability of enough well-located spacecraft at that moment for our purpose. We have used a 16 spacecraft data set. We calculated the mass flux variation and the change in magnetic field components across the discontinuity. Thus, we identified the solar wind discontinuity as a shock. We also calculated the orientation of the solar wind shock front. Then, we examined the effects of the shock front propagation in detail. With this large data set, we obtained a global view of the travelling wave front and identified the effects of the compressional wave front. Thus, we determined in detail the shock front passing through the different parts of the magnetosphere. We described the compressional effects in the bow shock, the magnetosheath, and the magnetopause and we depicted the propagation inside the inner magnetosphere. Moreover, we used an extensive data set from magnetic observatories on the ground and so we studied the global distribution of the SI waveform. Finally, the comparison of the observational facts with those derived from the theoretical model showed a good consistency. On the basis of the waveforms and polarizations of this SI, we determined the location in latitude where ionospheric currents (ICs) changed their sense. And also, we related polarization at ground to polarization measured by GOES spacecraft.
AB - The aim of this study is to provide a complete scope of a magnetic sudden impulse (SI) event along its way through interplanetary space and the magnetosphere until its arrival to the ground. In our case, we chose the event of 19th November 2007 because of the availability of enough well-located spacecraft at that moment for our purpose. We have used a 16 spacecraft data set. We calculated the mass flux variation and the change in magnetic field components across the discontinuity. Thus, we identified the solar wind discontinuity as a shock. We also calculated the orientation of the solar wind shock front. Then, we examined the effects of the shock front propagation in detail. With this large data set, we obtained a global view of the travelling wave front and identified the effects of the compressional wave front. Thus, we determined in detail the shock front passing through the different parts of the magnetosphere. We described the compressional effects in the bow shock, the magnetosheath, and the magnetopause and we depicted the propagation inside the inner magnetosphere. Moreover, we used an extensive data set from magnetic observatories on the ground and so we studied the global distribution of the SI waveform. Finally, the comparison of the observational facts with those derived from the theoretical model showed a good consistency. On the basis of the waveforms and polarizations of this SI, we determined the location in latitude where ionospheric currents (ICs) changed their sense. And also, we related polarization at ground to polarization measured by GOES spacecraft.
KW - Geomagnetism
KW - Magnetosphere (inner)
KW - Magnetosphere (outer)
KW - Satellites (artificial)
KW - Solar wind
UR - http://www.scopus.com/inward/record.url?scp=84934920725&partnerID=8YFLogxK
U2 - 10.1051/swsc/2015016
DO - 10.1051/swsc/2015016
M3 - Article
AN - SCOPUS:84934920725
SN - 2115-7251
VL - 5
JO - Journal of Space Weather and Space Climate
JF - Journal of Space Weather and Space Climate
M1 - A13
ER -