Skip to main content Accessibility help
×
Home

Geometric and magnetic properties of coronal flux ropes associated with CMEs leading to geomagnetic storms

  • Ranadeep Sarkar (a1) and Nandita Srivastava (a1)

Abstract

We have studied three Interplanetary Coronal Mass Ejections (ICMEs) having clear signatures of magnetic cloud (MC) arrival at 1 AU and their associated solar sources during 2011 to 2013. Comparing the axial magnetic field strength (B0) of the near-Sun coronal flux-ropes with that of the MC at 1 AU, we have found that the average inferred value of B0 at 1 AU assuming the self-similar expansion of the flux-rope is two times smaller than the value of B0 obtained from the results of MC fitting. Furthermore, by comparing the initial orientation of the flux-rope near the Sun and its final orientation at 1 AU we have found that the three CMEs exhibited more than 80° rotation during its propagation through the interplanetary medium. Our study suggests that although the near-Sun magnetic properties of coronal flux-ropes can be used to infer the field strength of the associated MC at 1 AU, it is difficult to estimate the final orientation of the MC axis in order to predict the geo-effectiveness of the ICMEs.

Copyright

References

Hide All
Gopalswamy, N., Akiyama, S., Yashiro, S., & Xie, H. (2017), J. Atmos. Sol. Terr. Phys, https://doi.org/10.1016/j.jastp.2017.06.004
Wang, Y., Zhuang, B., Hu, Q., Liu, R., Shen, C., & Chi, Y.. (2016), J. Geophys. Res. Space Physics, 121, 9316-9339
MathJax
MathJax is a JavaScript display engine for mathematics. For more information see http://www.mathjax.org.

Keywords

Geometric and magnetic properties of coronal flux ropes associated with CMEs leading to geomagnetic storms

  • Ranadeep Sarkar (a1) and Nandita Srivastava (a1)

Metrics

Altmetric attention score

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed