CME Scoreboard

Prediction for CME (2016-07-17T12:48:00-CME-001)

:Issued: 2016 Jul 18 1221 UTC
:Product: documentation at http://www.sidc.be/products/presto
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On 17 July, a long duration (5h50m) C1 event near and in the active region (AR) complex NOAA 2565/2567 peaked at 08:03UT. Coronal dimming to the east and west of the sunspot cluster was observed. Another eruptive event (also with coronal dimming) was observed in a spotless region in the southeast solar quadrant (S18E30) between 13UT and 15UT.

Associated with these eruptions were several faint and slow coronal mass ejections (CMEs), having widths between 70 and 120 degrees and partially overlapping. Hence, a partial halo CME cannot be excluded as LASCO/C2 imagery show them first resp. around 10:48UT (directed to the east), 11:24UT (south), 12:36UT (north), 12:48UT (east-southeast). In view of the coronal dimming observed in the NOAA 2565/2567 regions which were located near disk centre, it is expected that some of the related CMEs may have had an earth-directed component. True speeds were estimated to be between 290 and 350 km/s, with arrival time estimated to be 22 July at 00:00UT (+/- 12 hours).

Active geomagnetic conditions are expected. A minor storming episode is not excluded in view of the possible interactions between the CMEs and with the wind streams from the coronal holes.
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