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The 2012 July 23 Backside Eruption: An Extreme Energetic Particle Event?
Nat Gopalswamy, Seiji Yashiro, Neeharika Thakur +3
The backside coronal mass ejection (CME) of 2012 July 23 had a short Sun to Earth shock transit time (18.5 hours). The associated solar energetic particle (SEP) event had a >10 MeV…
A Study of the 2012 January 19 Complex Type II Radio Burst Using Wind, SOHO, and STEREO Observations
T. B. Teklu, A. V. Gholap, N. Gopalswamy +5
We report on a case study of the complex type II radio burst of 2012 January 19 and its association with a white light coronal mass ejection (CME). The complexity can be described…
On the Directivity of Low-Frequency Type IV Radio Bursts
Nat Gopalswamy, Sachiko Akiyama, Pertti Mäkelä +2
An intense type IV radio burst was observed by the STEREO Behind (STB) spacecraft located about 144 degres behind Earth. The burst was associated with a large solar eruption that o…
Unusual Polar Conditions in Solar Cycle 24 and their Implications for Cycle 25
Nat Gopalswamy, Seiji Yashiro, Sachiko Akiyama
We report on the prolonged solar-maximum conditions until late 2015 at the north-polar region of the Sun indicated by the occurrence of high-latitude prominence eruptions and micro…