Characteristics of counter-Sq SFE (SFE) at the dip equator CPMN stations A05306

Y. Yamazaki, K. Yumoto, A. Yoshikawa, S. Watari, H. Utada

Research output: Contribution to journalArticle

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Abstract

The solar flare effect (SFE) at dip equatorial latitudes sometimes shows the counter-Sq variation around local noon. In this paper, we refer to this type of SFE as SFE*. Observations obtained by the Circum-pan Pacific Magnetometer Network (CPMN) reveal some previously unknown characteristics of SFE*. Some of these features are the following: (1) the counter-Sq SFE variation is observed in limited longitude (local time) and latitude sectors (i.e., LT ≈ 1030-1300, \DipLat.\ ≲, 1.5°) (2) outside this limited region, the amplitude of SFE(Z/) and preflare S q(H) have a linear relationship (3) SFE* is observed during the significant depression of the horizontal magnetic field at dip equatorial latitudes, which indicates the presence of westward electric fields whose origin remains to be understood.

Original languageEnglish
Article numberA05306
JournalJournal of Geophysical Research: Space Physics
Volume114
Issue number5
DOIs
Publication statusPublished - May 1 2009

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Magnetometers
equators
magnetometer
solar flares
magnetometers
dip
counters
stations
Electric fields
Magnetic fields
longitude
electric field
magnetic fields
noon
effect
station
sectors
magnetic field
electric fields

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

Characteristics of counter-Sq SFE (SFE) at the dip equator CPMN stations A05306. / Yamazaki, Y.; Yumoto, K.; Yoshikawa, A.; Watari, S.; Utada, H.

In: Journal of Geophysical Research: Space Physics, Vol. 114, No. 5, A05306, 01.05.2009.

Research output: Contribution to journalArticle

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