A powerful solar flare measuring M5.9 at its peak time erupted from eastern limb of the Sun on August 24, 2014, at 12:17 UTC. The event started at 12:00, peaked at 12:17 and ended at 12:25 UTC.
The source was new AR 2151 located on the south eastern limb. Coronal Mass Ejection (CME) produced by this eruption should not be Earth directed.
A Type II (593 km/s) and Tenflare (409 sfu) radio emissions were associated with this event. Potential impacts: area of impact centered primarily on sub-solar point on the sunlit side of Earth. Radio – limited blackout of HF (high frequency) radio communication for tens of minutes.
Type II emissions occur in association with eruptions on the sun and typically indicate a CME is associated with a flare event.
NOAA SWPC forecasters estimate 30% chance for M-class, and 5% chance for X-class solar flare in next two days.
The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed, as measured by the ACE spacecraft, reached a peak speed of 358 km/s at 22/2312Z. Total IMF reached 5 nT at 23/0505Z. The maximum southward component of Bz reached -4 nT at 23/0601Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 457 pfu.
Space Weather Message Code: SUMXM5
Serial Number: 119
Issue Time: 2014 Aug 24 1256 UTC
SUMMARY: X-ray Event exceeded M5
Begin Time: 2014 Aug 24 1200 UTC
Maximum Time: 2014 Aug 24 1217 UTC
End Time: 2014 Aug 24 1225 UTC
X-ray Class: M5.9
Optical Class: 2b
NOAA Scale: R2 – Moderate
Comment: Impulsive M5/2b flare from new Region 2151 near the SE limb. Type II (593 km/s) and Tenflare (409 sfu) radio emissions associated with this event.
Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio – Limited blackout of HF (high frequency) radio communication for tens of minutes.
Space Weather Message Code: ALTTP2
Serial Number: 954
Issue Time: 2014 Aug 24 1249 UTC
ALERT: Type II Radio Emission
Begin Time: 2014 Aug 24 1214 UTC
Estimated Velocity: 593 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.
Space Weather Message Code: SUM10R
Serial Number: 624
Issue Time: 2014 Aug 24 1249 UTC
SUMMARY: 10cm Radio Burst
Begin Time: 2014 Aug 24 1209 UTC
Maximum Time: 2014 Aug 24 1210 UTC
End Time: 2014 Aug 24 1216 UTC
Duration: 7 minutes
Peak Flux: 409 sfu
Latest Penticton Noon Flux: 132 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.
There are currently 8 numbered sunspot regions on the disk.
Sunspots on August 24, 2014. Image credit: NASA SDO / HMI
2141 – Alpha
2143 – Beta
2146 – Beta
2147 – Alpha
2148 – Beta
2149 – Beta-Gamma
2150 – Alpha
2151 – Alpha
Featured image: NASA SDO AIA 131
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