M1.2 solar flare from sunspot region 2169

Thursday, 18 September 2014 15:15 UTC

The solar flare was associated with an Type II radio burst produced by a shock trough the solar corona with an estimated velocity of 537 km/s. Coronagraph imagery from SOHO/LASCO do not show that there was a Coronal Mass Ejection (CME) associated with this event. The GOES-15 satellite was eclipsed by Earth at the time of the flare which is the reason why there was not an automated alert for this event. 

ALERT: Type II Radio Emission
Begin Time: 2014 Sep 18 0842 UTC
Estimated Velocity: 537 km/s

Sunspot region 2169
Sunspot region 2169 is actually a very simple sunspot region and that is why this event came as a surprise. It is unlikely that this sunspot region could produce more solar flares of this magnitude. All the other sunspot regions on the disk are also unremarkable.