Geomagnetic conditions globally were initially quiet during the past 24 hours, increasing to active levels (NOAA Kp 4- ) between 03:00 UTC and 06:00 UTC on July 15. Geomagnetic conditions locally were initially quiet to unsettled (K Bel 2 to 3), increasing to active levels (K Bel 4) between 06:00 UTC and 08:00 UTC. Mostly quiet to unsettled conditions (NOAA Kp 2 to 3) are expected over the next 24 hours, with a chance for isolated active intervals, due to the ongoing influence of the high-speed stream.
Over the past 24 hours, the solar wind parameters (SOLAR-1 and ACE) reflected the possible impact of a glancing blow (associated with SIDC CME 686), combined potentially with a high-speed stream from the southern, positive polarity coronal holes (SIDC Coronal Holes 172 and 173). The solar wind speed increased from 350 km/s to around 500 km/s. The interplanetary magnetic field reached a maximum of 14 nT. The Bz component reached a minimum of -8 nT. The interplanetary magnetic field angle phi was initially negative and has switched to positive since 18:00 UTC on July 14. Mostly enhanced solar wind conditions are expected over the next 24 hours, due to the ongoing influence of the high-speed stream.