| 著者名 | Authors | 所属機関名 | 所属機関名(欧文) | |
| 1 | #A1 | Li/Yan | K1 | Kyushu University |
| 2 | F2 | Yumoto/K | K2 | Kyushu University |
| 3 | F3 | Ohtani/S | K3 | John Hopkins University, MD, USA |
講演予稿:
abstract:
Pi2 pulsations have been classical
indicators of the terrestrial substorms.
With recent POLAR satellite auroral
image data, and an extended ground
magnetometer network CPMN, we
re-examine the relation between the
Pi2s and the auroral breakups. From one
month data (July, 1996), 36 out of 49
auroral breakups (73.5%) have
associated Pi2s within 10 min, while 26
auroral breakups have associated Pi2s
within 2 min. Auroral images are from
north polar region and Pi2s are from low
latitude stations covering all local times.
However, there are 35 groups of
significant Pi2s in this month without
auroral breakups observed. Besides the
data availability of the auroral image
data, we consider this fact curious. More
data in northern winter months will be
examined. Statistical results in regard
to the correspondence of Pi2s and
substorms will be presented. We will
also select different cases for detailed
studies, i.e. 1. an auroral breakup with
no Pi2; with a delayed Pi2; with a
concurrent Pi2; or with a pre-occurred
Pi2; 2. a Pi2 with no auroral breakup.
For different cases, we will examine
other substorm parameters, such as the
magnetotail depolarization and/or
particle injections.
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