Just to refresh the memory, here's a few links pertaining to Co-rotating Interation Regions (CIRs):

[link to www.physics.usyd.edu.au]

[link to ase.tufts.edu]

[link to www.ann-geophys.net]

This would also help explain the bumps in the ACE proton energy levels that Da fuq was noticing last night. Sometimes a CIR can cause a compresssion zone in which particles are accelerated.

ACE 24-hour EPAM:
[link to www.swpc.noaa.gov]

Good work, Da fuq!