This morning’s M9-class eruption propelled a CME toward Earth.
Moving at an estimated speed of 1950 km/s, the cloud is expected to sweep up two earlier CMEs already en route.
Analysts at the GSFC Space Weather Lab say the combined triple-CME should reach Earth on August 5th at 13:55 UT plus or minus 7 hours. “The impact on Earth is likely to be major: the estimated maximum geomagnetic activity index level Kp is 7 (Kp ranges from 0 – 9). The flanks of the CME may also impact STEREO A, Mars and Mercury/MESSENGER.” Spaceweather