CME Scoreboard

Prediction for CME (2014-08-25T15:01:00-CME-001)

:Issued: 2014 Aug 26 0554 UTC
:Product: documentation at http://www.sidc.be/products/presto
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An asymmetric halo CME was visible in SOHO/LASCO C2 and C3 and STEREO B/COR2 imagery. The first measurement in LASCO C2 was on August 25 at 15:24 UT and in LASCO C3 at 16:18 UT. The CME was associated with a M2 flare peaking at 15:11 UT from  NOAA AR 2146, dimming and type II and IV 
radio bursts (shock speed estimated at 707 km/s by the Sagamore Hill station).
The CME has a projected line-of-sight speed of 568 km/s (CACTus estimate).

A second partial halo CME was visible in SOHO/LASCO C2 and C3, with first measurements on August 25 at 20:36 UT (C2) and 21:18 UT (C3). Also this CME was associated with an M-class flare (M3.9, peak at 20:21 UT) with NOAA AR 2146 as source region. The CME is travelling with a projected line-of-sight speed of 761 km/s (CACTus estimate).

Both CMEs are mainly propagating in the western direction from the Sun-Earth line and might be interacting with each other. A shock might arrive in the second half of the UT day of August 28.  
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