No. 217, "Reflection of Coronal Global Waves," by Ines Kienreich and Hugh Hudson: a homologous series of global coronal waves reflects at a coronal-hole boundary.

See http://sprg.ssl.berkeley.edu/~tohban/wiki/index.php/Reflection_of_Coronal_Global_Waves

Older Nuggets are also available at
We publish these at roughly two-week intervals and welcome contributions, which should be related, at least loosely, to RHESSI science.