Abstract
In the framework of IACG Campaign #2, we study a case in which the GEOTAIL spacecraft was close to the mid-tail magnetopause when three substorms took place. GEOTAIL was mainly located within the dawnside plasmasheet, and its average speed normal to the nominal magnetopause was very small (∼0.2 R E /hr) because it was near its apogee. It exited to the LLBL∼magnetosheath during the expansion to recovery phases of each substorm, stayed there for a while, and then returned to the plasmasheet near the end of the recovery phase. This pattern suggests a shrinkage of the mid-tail magnetosphere after the expansion onset so that the tail radius becomes smaller than that in the quiet time. We interpret it as a result of strong tailward flows from the near-Earth neutral line which transports plasma in the mid-tail region to the distant tail and causes a rarefaction in the mid-tail region.
| Original language | English |
|---|---|
| Pages (from-to) | 1689-1696 |
| Number of pages | 8 |
| Journal | Advances in Space Research |
| Volume | 25 |
| Issue number | 7-8 |
| DOIs | |
| Publication status | Published - Jan 1 2000 |
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All Science Journal Classification (ASJC) codes
- Aerospace Engineering
- Astronomy and Astrophysics
- Geophysics
- Atmospheric Science
- Space and Planetary Science
- Earth and Planetary Sciences(all)
Cite this
Substorm-associated shrinkage of the mid-tail magnetosphere : IACG campaign #2. / Kawano, Hideaki; Nakamura, R.; Kokubun, S.; Mukai, T.; Yamamoto, T.; Yumoto, K.; Slavin, J. A.
In: Advances in Space Research, Vol. 25, No. 7-8, 01.01.2000, p. 1689-1696.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Substorm-associated shrinkage of the mid-tail magnetosphere
T2 - IACG campaign #2
AU - Kawano, Hideaki
AU - Nakamura, R.
AU - Kokubun, S.
AU - Mukai, T.
AU - Yamamoto, T.
AU - Yumoto, K.
AU - Slavin, J. A.
PY - 2000/1/1
Y1 - 2000/1/1
N2 - In the framework of IACG Campaign #2, we study a case in which the GEOTAIL spacecraft was close to the mid-tail magnetopause when three substorms took place. GEOTAIL was mainly located within the dawnside plasmasheet, and its average speed normal to the nominal magnetopause was very small (∼0.2 R E /hr) because it was near its apogee. It exited to the LLBL∼magnetosheath during the expansion to recovery phases of each substorm, stayed there for a while, and then returned to the plasmasheet near the end of the recovery phase. This pattern suggests a shrinkage of the mid-tail magnetosphere after the expansion onset so that the tail radius becomes smaller than that in the quiet time. We interpret it as a result of strong tailward flows from the near-Earth neutral line which transports plasma in the mid-tail region to the distant tail and causes a rarefaction in the mid-tail region.
AB - In the framework of IACG Campaign #2, we study a case in which the GEOTAIL spacecraft was close to the mid-tail magnetopause when three substorms took place. GEOTAIL was mainly located within the dawnside plasmasheet, and its average speed normal to the nominal magnetopause was very small (∼0.2 R E /hr) because it was near its apogee. It exited to the LLBL∼magnetosheath during the expansion to recovery phases of each substorm, stayed there for a while, and then returned to the plasmasheet near the end of the recovery phase. This pattern suggests a shrinkage of the mid-tail magnetosphere after the expansion onset so that the tail radius becomes smaller than that in the quiet time. We interpret it as a result of strong tailward flows from the near-Earth neutral line which transports plasma in the mid-tail region to the distant tail and causes a rarefaction in the mid-tail region.
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U2 - 10.1016/S0273-1177(99)00685-7
DO - 10.1016/S0273-1177(99)00685-7
M3 - Article
VL - 25
SP - 1689
EP - 1696
JO - Advances in Space Research
JF - Advances in Space Research
SN - 0273-1177
IS - 7-8
ER -