5 novembre 2015 - 12:00 pm Pubblicato da
Un brillamento di lunga durata della potenza di classe M3.7 è scaturito dalla Regione geoeffettiva 2443 alle ore 13:52 UTC di ieri 4 novembre 2015. L’evento è iniziato alle 13:31 e si è concluso alle ore 14:13 UTC. In seguito agli aggiornamenti radio questi suggeriscono che vi è stata un’espulsione di massa coronale (CME).

L’evento associato è stato di tipo II (con velocità stimata di 955 km/s) e di emissioni di tipo radio IV. Le emissioni di tipo IV si verificano in associazione a importanti eruzioni solari e sono in genere associate alla formazione di forti CME e tempeste di radiazioni solari.

La Regione 2443 classificata Beta-Delta si trova al centro del disco solare. La CME che ne è scaturita risulta diretta verso la Terra, con probabile arrivo stimato nella giornata del 7 novembre.

Dopo i brillamenti M1.9 e 2.5 scaturiti dalla Regione 2445, questo è il terzo brillamento solare di classe Media della giornata.

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SWPC alerts:

Space Weather Message Code: SUM10R
Serial Number: 675
Issue Time: 2015 Nov 04 1408 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2015 Nov 04 1338 UTC
Maximum Time: 2015 Nov 04 1341 UTC
End Time: 2015 Nov 04 1346 UTC
Duration: 8 minutes
Peak Flux: 290 sfu

Latest Penticton Noon Flux: 124 sfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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.

***

Space Weather Message Code: ALTTP2
Serial Number: 1031
Issue Time: 2015 Nov 04 1410 UTC

ALERT: Type II Radio Emission
Begin Time: 2015 Nov 04 1343 UTC
Estimated Velocity: 955 km/s

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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: ALTTP4
Serial Number: 518
Issue Time: 2015 Nov 04 1412 UTC

ALERT: Type IV Radio Emission
Begin Time: 2015 Nov 04 1351 UTC

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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.

***

Space Weather Message Code: ALTEF3
Serial Number: 2266
Issue Time: 2015 Nov 04 1420 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2015 Nov 04 1405 UTC
Station: GOES-13
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

***

Space Weather Message Code: SUM10R
Serial Number: 676
Issue Time: 2015 Nov 04 1453 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2015 Nov 04 1421 UTC
Maximum Time: 2015 Nov 04 1425 UTC
End Time: 2015 Nov 04 1433 UTC
Duration: 12 minutes
Peak Flux: 180 sfu
Latest Penticton Noon Flux: 124 sfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

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.

Featured image: NASA SDO/AIA 304

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