Physics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsp51a..15a&link_type=abstract
American Geophysical Union, Spring Meeting 2008, abstract #SP51A-15
Physics
2102 Corotating Streams, 2169 Solar Wind Sources, 7511 Coronal Holes, 7534 Radio Emissions, 7549 Ultraviolet Emissions
Scientific paper
We study the characteristics of 11 equatorial coronal holes (CHs), which resulted in large (minimum Dst index < - 100 nT) geomagnetic storms in the interval 1996 to 2005. These storms were part of the Living with a Star (LWS) Coordinated Data-Analysis Workshop (CDAW) held in March 2005. Using 17 GHz microwave images obtained by the Nobeyama Radio Heliograph (NoRH) and EUV images obtained by the Extreme-ultraviolet Imaging Telescope (EIT), we find the EUV CH area and the CH radio enhancement area are linearly correlated with the solar wind speed. The solar wind speed is also related to the flux expansion factor obtained as the ratio between areas of radio enhancement and EUV CH. We study the temporal sequences of the solar wind parameters and show that the time of CH central meridian passage, peak total magnetic field strength, peak temperature, and peak speed are delayed by -2.5, 0.1, 0.6, 1.1 days from the time of peak CIR density, respectively.
Akiyama Sanae
Gopalswamy Nat
Yashiro Seiji
No associations
LandOfFree
Properties of Coronal Holes Associated With Large Geomagnetic Storms 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 Properties of Coronal Holes Associated With Large Geomagnetic Storms, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Properties of Coronal Holes Associated With Large Geomagnetic Storms will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1403036