Geomagnetic storm in progress, gigantic solar prominences
Amateur astronomers around the world are reporting strong activity on the limb of the sun. The prominences on June 4th were gigantic. Prominences are clouds of hot plasma held above the stellar surface by unstable magnetic fields. They can shift, subside, surge, and sometimes even explode–almost anything is possible. Readers with solar telescopes are encouraged to monitor developments. (SpaceWeather)
Solar wind
speed: 500.7 km/sec
density: 0.3 protons/cm3
Planetary K-index
Now: Kp= 4 unsettled
24-hr max: Kp= 6 storm
Interplanetary Mag. Field
Btotal: 10.2 nT
Bz: 3.2 nT north
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