EVENT LOG: M5.1 SOLAR FLARE     DATE: 9/28/2014 @ 02:58 UTC     SOURCE: Sunspot 2173
DISCUSSION:

A moderately strong solar flare measuring M5.1 was observed around region 2173, with interaction between AR 2172 at 02:58 UTC (Sept. 28, 2014). The event was associated with a Type II Radio Emission with an estimated velocity of 638 km/s, along with a 10cm Radio Burst (TenFlare) measuring 220 solar flux units (sfu) and lasting 5 minutes. Only an insignificant CME was generated and is not expected to be geoeffective.

LOG ENTRIES:

09/28/2014 @ 12:05 UTC
Coronagraph imagery is now complete. Only a minor coronal mass ejection (CME) was produced and appears to be directed to the south and west. A noteworthy impact past Earth is not likely.

09/28/2014 @ 04:15 UTC
Attached imagery compilation by the Solar Dynamics Observatory (SDO) captures the M5.1 solar flare around regions 2172 / 2173. Also included is the GOES-15 Solar X-Ray data, along with the Global D-Layer Absorption data as monitored during the flare event.

09/28/2014 @ 03:35 UTC
When watching the event using the AIA 193 angstroms channel, a Coronal Mass Ejection (CME) appears probable, but will likely be directed mostly to the south and west. Updated coronagraph imagery is required to properly make this determination.

09/28/2014 @ 03:25 UTC
The flare event was associated with a Type II Radio Emission with an estimated velocity of 638 km/s, along with a 10cm Radio Burst (TenFlare) measuring 220 solar flux units (sfu) and lasting 5 minutes. More information regarding a possible coronal mass ejection (CME) to follow.

ALERT: Type II Radio Emission
Begin Time: 2014 Sep 28 0245 UTC
Estimated Velocity: 638 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

ALERT: Type IV Radio Emission
Begin Time: 2014 Sep 28 0311 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

SUMMARY: 10cm Radio Burst
Begin Time: 2014 Sep 28 0243 UTC
Maximum Time: 2014 Sep 28 0247 UTC
End Time: 2014 Sep 28 0248 UTC
Duration: 5 minutes
Peak Flux: 220 sfu
Latest Penticton Noon Flux: 181 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

09/28/2014 @ 03:05 UTC
A moderately strong solar flare measuring M5.1 was observed around region 2173, with interaction between AR 2172 at 02:58 UTC. More to follow.

FLARE IMAGERY:

CME IMAGERY:

GOES-15 X-Ray FLUX:

AIA VIDEO: