Shock Directions, Magnitudes, and ICMES Characteristics

Authors

  • Harshit Singh Department of Physics, Presidency College, Chennai, Tamil Nadu, INDIA.
  • Rishabh Shrivastava Department of Physics, Presidency College, Chennai, Tamil Nadu, INDIA.

Keywords:

Cosmic rays, Forbush decrease, geomagnetic storms

Abstract

Forbush decrease (Fd) event in cosmic rays shows a sudden decrease in count rates of neutrons followed by gradual recovery, typically lasting for several days. In this study we have shorted out 54 events of Forbush decrease from the listings of hourly plots of cosmic ray intensity for the period of 1996 to 2007. The occurrence of forbush decrease is found to be higher during high solar activity period. The correlation between magnitudes of cosmic ray Forbush decreases and magnitude of geomagnetic storms are found positive and high for solar cycle 23. CME speed show normal correlation with Fd magnitudes. Large amount of Fds are associated with CMEs and M-Class solar flares.

References

Badruddin, 2002. Shock orientations, magnetic turbulence and forbush decreases. Solar Physics,165:195206.

Barnden L.R., 1973. Large scale magnetic field configuration associated with forbush decreases. Proc. 13th Int. cosmic ray Conf., 2:1277 -1282.

Cane H.V., 2000, Coronal mass ejection and Forbush decreases. Space Sci.Rev., 93: 55-77.

Cane H.V., Richardson I.G., and Von Rosenving T.T., 1996. Cosmic ray decreases, 1964-1994. J. Geophys. Res., 101: 21561.

Cane H.V., Richardson I.G. and Wibrengez G.,1997. Helios 1 and 2 observations of particles decreases ejecta and magnetic clouds. J of Geophysics Res.,102:7075-7086.

Forbush S.E., 1938. On the world-wide changes in cosmic ray intensity. Phy. Rev., 54:975.

Gupta V, Singh Y.P. and Badruddin., 2010. Characteristics features of ICMEs associated with big storms in geomagnetic activity and large Forbush decreases in Cosmic ray intensity. Indian Journal of Radio and Space Physics, 39:265-0269.

Jothe M.K., Singh M. and Shrivastava P.K., 2010. Interplanetary CMEs and cosmic ray intensity variation. Indian J. Sci. Res., 1:55-58.

Kane R.P., 2010. Relationship between Dst (min.) magnitudes and characteristics of ICMES. Indian Journal of Radio and Space Physics, 39:177-183.

Lockwood J.A., 1971. Forbush decreases in cosmic ray intensity. Space. Science Rev.,12: 688-715.

Shrivastava P.K and Singh G., 2008. Relationship of Interplanetary CMEs on geomagnetic activity. Indian Journal of Radio & Space Physics,37:244-248.

Shrivastava P.K., Jothe M.K. and Singh M., 2011. Longitudinal distribution of solar flares and their association with coronal mass ejections and forbush decreases. Solar Physics, 269:401-410.

Zhang G. and Burlaga L.F.,1988. Magnetic clouds, geomagnetic disturbances and Cosmic ray decreases. J Geophysics Res.,93: 2511-2518.

Zhang G. and Burlaga L.F.,1988. Magnetic clouds, geomagnetic disturbances and Cosmic ray decreases. J Geophysics Res.,93: 2511-2518.

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Published

2022-02-28

How to Cite

Singh, H., & Shrivastava, R. (2022). Shock Directions, Magnitudes, and ICMES Characteristics. Stallion Journal for Multidisciplinary Associated Research Studies, 1(1), 32–34. Retrieved from https://sjmars.com/index.php/sjmars/article/view/9

Issue

Vol. 1 No. 1 (2022): February Issue

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Articles

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