Solar wind conditions at the ACE spacecraft suggested tine influence of
a modest coronal hole high speed stream which became geoeffective early
in the period yesterday. Solar wind speed increased from around 350
km/s to the low 400 km/s range. Temperature increased slightly as well.
The solar sector remained negative while Bt climbed to 12 nT by 14/0950
UTC and Bz dipped as low as -6 nT early in the period, but was
predominantly positive after 13/2143 UTC.