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Testing the Empirical Shock Arrival Model using Quadrature Observations
N. Gopalswamy, P. Mäkelä, H. Xie +1
The empirical shock arrival (ESA) model was developed based on quadrature data from Helios (in-situ) and P-78 (remote-sensing) to predict the Sun-Earth travel time of coronal mass…
Obscuration of Flare Emission by an Eruptive Prominence
Nat Gopalswamy, Seiji Yashiro
We report on the eclipsing of microwave flare emission by an eruptive prominence from a neighboring region as observed by the Nobeyama Radioheliograph at 17 GHz. The obscuration of…
A Multiwavelength Study of Eruptive Events on January 23, 2012 Associated with a Major Solar Energetic Particle Event
N. C. Joshi, W. Uddin, A. K. Srivastava +15
We use multiwavelength data from space and ground based instruments to study the solar flares and coronal mass ejections (CMEs) on January 23, 2012 that were responsible for one of…
The First Ground Level Enhancement Event of Solar Cycle 24: Direct Observation of Shock Formation and Particle Release Heights
N. Gopalswamy, H. Xie, S. Akiyama +3
We report on the 2012 May 17 Ground Level Enhancement (GLE) event, which is the first of its kind in Solar Cycle 24. This is the first GLE event to be fully observed close to the s…
Implications of mass and energy loss due to coronal mass ejections on magnetically-active stars
Jeremy J. Drake, Ofer Cohen, Seiji Yashiro +1
Analysis of a database of solar coronal mass ejections (CMEs) and associated flares over the period 1996-2007 finds well-behaved power law relationships between the 1-8 AA flare X-…
Coronal Hole Influence on the Observed Structure of Interplanetary CMEs
P. Mäkelä, N. Gopalswamy, H. Xie +3
We report on the coronal hole (CH) influence on the 54 magnetic cloud (MC) and non-MC associated coronal mass ejections (CMEs) selected for studies during the Coordinated Data Anal…