Journal of Earth System Science

, Volume 123, Issue 6, pp 1273–1285 | Cite as

Spread-F during the magnetic storm of 22 January 2004 at low latitudes: Effect of IMF-Bz in relation to local sunset time

  • R G Rastogi
  • H Chandra
  • P Janardhan
  • Thai Lan Hoang
  • Louis Condori
  • T K Pant
  • D S V V D Prasad
  • B Reinisch
Article

Abstract

The paper describes the results of spread-F at low latitude stations around the world during the magnetic storm starting at 0130 UT on 22 January 2004. The storm can be divided into two phases, first phase up to 1000 UT when interplanetary magnetic field IMF-Bz was highly fluctuating around a small positive value and the second phase after a sudden large southward turning of IMF-Bz at 1030 UT. The first phase produced strong spread-F at Jicamarca, Sao Luis, and Ascension Island and caused complete inhibition of spread-F at Thumba and Waltair in India. It generated weak spread-F at Ho Chi Minh City in Vietnam and strong spread-F at Hainan and Chung Li. The strong spread-F at Hainan and Chung Li were caused by the positive IMF-Bz during the first phase of the storm and not by the negative pulse of IMF-Bz at 1000 UT.

Keywords

Equatorial ionosphere space weather geomagnetic storm 

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Copyright information

© Indian Academy of Sciences 2014

Authors and Affiliations

  • R G Rastogi
    • 1
  • H Chandra
    • 1
  • P Janardhan
    • 1
  • Thai Lan Hoang
    • 2
  • Louis Condori
    • 3
  • T K Pant
    • 4
  • D S V V D Prasad
    • 5
  • B Reinisch
    • 6
  1. 1.Physical Research LaboratoryAhmedabadIndia
  2. 2.Institute of PhysicsVietnam Academy of SciencesHo Chi Minh CityVietnam
  3. 3.Jicamarca Radio ObservatoryJicamarcaPeru
  4. 4.Space Physics LaboratoryThiruvananthapuramIndia
  5. 5.Department of PhysicsAndhra UniversityVishakhapatnamIndia
  6. 6.Digisonde International LLC 175LowellUSA

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