This is a classic textbook coronal hole storm. Solar Winds have exceeded 600 km/s for over 11 hours! I saw a peak of 690 km/s... quite fast.

My skills of tracking geomagnetic events are rusty and many old links are defunct now, but I have a few good ones that still work.

The Bz has been predominantly South but not strongly as in the Stealth CME on the 1st. Density is low and high velocities have been the main driver of the storm conditions. This persistence is a growing threat to overcharging malfunctions in satellites.

ACE SW Data:
[link to www.solarham.net (secure)]

DSCVR Realtime SW:
[link to www.swpc.noaa.gov (secure)]

GOES Magnetometer:
[link to www.swpc.noaa.gov (secure)]

Aurora Oval:
[link to www.swpc.noaa.gov (secure)]