Saturday, October 26, 2013

Second major solar flare of day - X2.1 from Region 1882

Via The Watchers, 25 October 2013


AR 1882 released another major solar flare today. The latest event peaked at 15:03 UTC as X2.1 solar flare. This region still poses no serious threat to Earth. We'll see how it evolves in the coming days as it rotates into geoeffective position.

Type II and IV radio emissions were associated with the event. 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. A 10 cm Radio Burst was also associated with the event.

Earlier today, AR 1882 erupted with strong X1.7 and moderate M1.0 flares. Check the report on that here.
With those already present, there are more interesting active regions coming into Earth view, this period of increased solar activity will continue.

Spaceweather reports that today's X1-flare was bracketed by two erupting magnetic filaments, each located hundreds of thousands of kilometers from AR1882. In other words, the X1 flare might have been just one piece of an interconnected global eruption.

Last time scientists observed something like this was on August 1, 2010, when an entire hemisphere of the Sun erupted. Filaments of magnetism snapped and exploded, shock waves raced across the stellar surface, billion-ton clouds of hot gas billowed into space. Astronomers knew they had witnessed something big.
It was so big, it may have shattered old ideas about solar activity. Read more about it here.


ALERT: Type II Radio Emission
Begin Time: 2013 Oct 25 1458 UTC
Estimated Velocity: 2078 km/s
Comment: Sagamore Hill reported a speed of 2078 km/s; San Vito reported a speed of 2105 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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ALERT: Type IV Radio Emission
Begin Time: 2013 Oct 25 1458 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.

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SUMMARY: X-ray Event exceeded X1
Begin Time: 2013 Oct 25 1451 UTC
Maximum Time: 2013 Oct 25 1503 UTC
End Time: 2013 Oct 25 1512 UTC
X-ray Class: X2.1
Location: S06E69
NOAA Scale: R3 - Strong
Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

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SUMMARY: 10 cm Radio Burst
Begin Time: 2013 Oct 25 1457 UTC
Maximum Time: 2013 Oct 25 1514 UTC
End Time: 2013 Oct 25 1541 UTC
Duration: 44 minutes
Peak Flux: 370 sfu
Latest Penticton Noon Flux: 161 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.

Updates:
At 17:09 UTC moderate M1.3 erupted from Region 1882.
At 19:15 UTC another M-class solar flare measuring M2.3 erupted from the same region.
Follow Sun's activity in almost real-time on SWS.

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