PRESTO FROM SIDC - RWC BELGIUM Sat Jun 30 2012, 0906 UT<br /><br />
An expected coronal hole high speed solar wind stream has arrived at ACE in the 
early UT hours of June 30. Solar wind velocity has exceeded 500 km/s and is 
expected to rise to significantly higher values. The Interplanetary Magnetic 
Field strength currently fluctuates around 10 nT.

Geomagnetic activity will likely be at active (K Dourbes = 4) or minor storm (K 
Dourbes = 5) levels in the second part of June 30 and on July 1st.