Tuesday, June 21, 2011

Incoming CME - Geomagnetic Storm Expected June 23rd


INCOMING: Magnetic fields above sunspot complex 1236 erupted during the early hours of June 21st, producing a C7-class solar flare and a full-halo CME. The expanding cloud is heading almost directly toward Earth:

According to analysts at the GSFC Space Weather Lab, the CME left the sun traveling 800 km/s and it will reach Earth on June 23rd at 23:22 UT (plus or minus 7 hours). A very cool 3D heliospheric model shows the cloud sweeping past our planet. The impact is expected to trigger a G2-class (Kp=6) geomagnetic storm. -- SpaceWeather

G 2
Power systems: high-latitude power systems may experience voltage alarms, long-duration storms may cause transformer damage.
Spacecraft operations: corrective actions to orientation may be required by ground control; possible changes in drag affect orbit predictions.
Other systems: HF radio propagation can fade at higher latitudes, and aurora has been seen as low as New York and Idaho (typically 55° geomagnetic lat.)**.
Kp = 6
600 per cycle
(360 days per cycle)