Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ihy..worke.116k&link_type=abstract
2nd UN/NASA Workshop on International Heliophysical Year and Basic Space Science. Proceedings of the conference held 27 Novembe
Astronomy and Astrophysics
Astrophysics
Scientific paper
a_santosh123@rediffmail.com The effect of (i) solar activity indices such as sunspot number (SSN), solar flux (SF), solar flare index (SFI), coronal index (CI) and cosmic ray intensity (CRI) and (ii) solar features such as Hα, X-ray solar flares, APDFs, CMEs and Coronal Hole Intensity (CHI) on geo-sphere have been investigated for solar cycle 23. It is observed that SSN, SF, SFI and CR shows maximum peak during the odd month whereas CI shows during the even month. The time lag between the CRI and solar activity is almost the same except for the CI. There is strong N-S asymmetry for solar cycle 23. An overall northern bias apparently prevails for solar flares and active prominences and disappearing filaments (APDFs). Hα and X-ray solar flares occurring over the western limb of the solar disk cause larger disturbances in magnetosphere leading to occurrence of Intense (Dst <- 100nT) GMSs whereas those solar flares which occur on the eastern limb of the solar disk lead to occurrence of Major (-50nT > Dst ≥-100nT) and Minor (-20nT ≥ Dst ≥ -50nT) GMSs. It is observed that Coronal Hole Intensity (CHI) is maximum for Minor GMSs followed by Major and Intense GMSs where as, mean CHI is maximum for Intense GMSs followed by Major and Minor GMSs. High Speed Solar Wind Streams (HSSWS), CMEs originated from the coronal holes have much greater ability to produce GMSs. The results show that the product of Vsw. Bzmin and Vcme. Bzmin along with minimum DST of the SSC day are the reliable predictors of the intensity of GMSs.
Kaur Simranjit
Kumar Santosh
No associations
LandOfFree
Solar and Interplanetary Causes of Geomagnetic Storms 1996-2005 (P24) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Solar and Interplanetary Causes of Geomagnetic Storms 1996-2005 (P24), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solar and Interplanetary Causes of Geomagnetic Storms 1996-2005 (P24) will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1338497