Characteristics of the association between an SC and a substorm onset

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概要

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• The time lag and other characteristics between an SC and an onset of a substorm were investigated. A substorm onset was defined by an onset of a Pi2 magnetic pulsation observed at three mid-latitude observatories. A clear occurrence peak of the substorm onsets appeared statistically around 10 min after the onset time of the SC's, but it did not appear for the negative SI (SI^-) events. A typical example showed that this time lag was consistent with the idea of the substorm triggering in the near earth magnetotail. The necessity of the preconditions for the SC-triggering was not so clear, but the SC-amplitude dependence of the triggering probability was clear. These results strongly suggest the reality of the triggering of a substorm by a sudden compression of the deep magnetosphere.

• 国立極地研究所の論文

著者

• IYEMORI Toshihiko

  Data Analysis Center for Geomagnetism and Space Magnetism, Garaduate School of Science, Kyoto Univer

• Tsunomura Satoru

  Kakioka Magnetic Observatory

• Iyemori Toshihiko

  Data Analysis Center For Geomagnetism And Spacemagnetism Faculty Of Sciences Kyoto University

• Iyemori Toshihiko

  Data Analysis Center For Geomagnetism And Space Magnetism Garaduate School Of Science Kyoto Universi

関連論文

• Local time dependence of the dominant frequency of Pi2 pulsations at mid-and low-latitudes
• Characteristics of CNA associated with geomagnetic sudden commencements
• Geomagnetic sudden commencements observed at the Syowa-Iceland conjugate stations
• Characteristics of polarization of geomagnetic sudden commencements observed at Syowa Station
• Structure of large amplitude abrupt magnetic variations observed by the MAGSAT
• Characteristics of small-scale magnetic fluctuations over the high-latitude ionosphere
• Upper atmosphere physics data, Syowa Station, 1984(Upper Atmosphere Physics 4)
• Simultaneous observation of geomagnetic sudden commencement above and below the ionosphere
• Characteristics of solar flare effect in the high-latitude ionosphere as observed by the SuperDARN radars
• UPPER ATMOSPHERE PHYSICS DATA, SYOWA STATION, 1984
• Local time dependence of the frequency of Pi2 waves simultaneously observed at 5 low-latitude stations
• Local time features of geomagnetic jerks
• Characteristics of geomagnetic sudden commencement observed in middle and low latitudes
• Characteristics of the association between an SC and a substorm onset
• Correlations of AKR index with Kp and Dst indices
• Scale-length dependence of the ratio between the magnetic and electric field perturbations in the ionospheric field-aligned current region
• On the nature of flux variations of trapped particles associated with sudden commencement and sudden impulse at synchronous orbit
• SSC-associated magnetic variations at the geosynchronous altitude
• A rough estimation of induction characteristics for geomagnetic variations at Syowa and Iceland
• A statistical study of ULF waves observed by MAGSAT at ionospheric altitude
• Low latitude aurorae on October 21, 1989. II.

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