for the second day in a row, sunspot AR1504 erupted and hurled a CME toward Earth.
The fast-moving (1360 km/s) cloud is expected to sweep up a previous CME and deliver a combined blow to Earth's magnetic field on June 16th around 10:16 UT.
This animation shows the likely progression of the approaching storm:
http://www.spaceweather.com/images2012/14jun12/20120613_195400_anim.tim-den.gif?PHPSESSID=dsshja5ifju3jcs9afevh9on07
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