Source: The Watchers - By Adonai, 11/13/12
Active Region 1613, located in southern hemisphere, produced three M-class solar flares in last 6 hours. At 23:28 UTC, November 12, 2012 it peaked with M2.0 solar flare, then on November 13, 2012 at 02:04 an impulsive M6.0 peaked followed by M2.5 at 05:50 UTC.
A Type II Radio Emission was associated with first two events. Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.
NOAA/SWPC issued Moderate R2 Radio Blackout level following an M6.0 flare at 02:04 UTC – possible limited blackout of HF radio communication on sunlit side, loss of radio contact for tens of minutes, degradation of low-frequency navigation signals for tens of minutes.
Space Weather Message Code: ALTTP2
Serial Number: 827
Issue Time: 2012 Nov 13 0004 UTC
ALERT: Type II Radio Emission
Begin Time: 2012 Nov 12 2328 UTC
Estimated Velocity: 645 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.
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Space Weather Message Code: ALTXMF
Serial Number: 184
Issue Time: 2012 Nov 13 0206 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2012 Nov 13 0204 UTC
NOAA Scale: R2 – Moderate
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/drap/index.html.
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Space Weather Message Code: ALTTP2
Serial Number: 828
Issue Time: 2012 Nov 13 0231 UTC
ALERT: Type II Radio Emission
Begin Time: 2012 Nov 13 0204 UTC
Estimated Velocity: 1193 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.
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/drap/index.html.
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