Attività solare in aumento – Come anticipato dal tweet di Francis Reddy, ora la conferma del NOAA: la macchia solare AR1739 ha prodotto una esplosione di Classe M, questa volta M5.7, dopo quella di ieri, M1.1 scaturita invece dalla regione AR1731. Il NOAA segnala Radio Blackouts prima R2, ora R1, ovvero disturbi radio dovuti all’azione solare. Attualmente persistono le condizioni che tipicamente sono associate alle eruzioni solari con rilascio di massa coronale, in concomitanza di un solar flare. Aggiornamenti in corso. Restate sintonizzati.
The #sun has erupted with an M5.7 #solarflare this afternoon, detected by GOES from region N15E85. It follows an M1.3 #flare from AR11731.
— Francis Reddy (@francisreddy) 03 maggio 2013
NOAA SUMMARY: X-ray Event exceeded M5 – Begin Time: 2013 May 03 1724 UTC – Maximum Time: 2013 May 03 1732 UTC – End Time: 2013 May 03 1741 UTC – X-ray Class: M5.7 – Optical Class: sf – Location: N16E81 – NOAA Scale: R2 – Moderate – Comment: New Region 1739. – 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.
ALERT: X-Ray Flux exceeded M5 – Threshold Reached: 2013 May 03 1729 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.
Issue Time: 2013 May 03 1819 UTC – ALERT: Type II Radio Emission – Begin Time: 2013 May 03 1745 UTC – Estimated Velocity: 1297 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.
Stay tuned for updates.
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