Two Solar CMEs (Coronal Mass Ejection) are inbound on their way to Earth and they may have merged into a single cloud that could produce significant storming when they reach Earth on August 5th around 10:00 UT.
STRONG SOLAR ACTIVITY: Active sunspot 1261 has unleashed a significant solar flare. The latest blast registered M9.3 on the Richter Scale of Flares, almost crossing the threshold into X-territory (X-flares are the most powerful kind). The number of energetic protons around Earth has jumped nearly 100-fold as a result of this event.
Moving at an estimated speed of 1950 km/s (more than 4 million miles per hour!), this CME is expected to sweep up an earlier CME already en route. Analysts at the Goddard Space Flight Center – Space Weather Lab say the combined cloud should reach Earth on August 5th at 10:00 UT plus or minus 7 hours: “The impact on Earth is likely to be major.
Official Space Weather Advisory
issued by NOAA Space Weather Prediction Center
Boulder, Colorado, USA
SPACE WEATHER ADVISORY BULLETIN
2011 August 04 at 10:58 a.m. MDT (2011 August 04 1658 UTC)
**** GEOMAGNETIC STORM EXPECTED ****
Space Weather Bulletin August 4, 2011
NOAA Region 1261, very active over the past few days, produced the third
of a sequence of Coronal Mass Ejections (CMEs) and Solar Radio Blackout
Events early today. The net effect of that activity is convergent CMEs
expected to disturb the geomagnetic field in the early hours, Universal
Time (UTC) of August 5. G3 (Strong) Geomagnetic Storm conditions are
likely as well as a distinct chance of S2 (Moderate) Solar Radiation
Storm levels being surpassed.
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