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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2013 May 24 1253 UTC

SIDC Forecast

Brillamenti solari

Active (M-class flares expected, probability >=50%)

Geomagnetism

Major magstorm expected (A>=50 or K>=6)

Protoni solari

Quiet

	10cm flux	Ap
24 May 2013	135	017
25 May 2013	135	038
26 May 2013	135	011

Bulletin

Solar activity has been eruptive the past 24 hours featuring several C-class flares mostly originating from AR NOAA 1756 (Catania 82). Active conditions are expected with M-class flares especially from AR NOAA 1755 (Catania 83) and NOAA 1756 (Catania 82). Proton levels of 30 MeV and 50 Mev have dropped below the 10.0 pfu treshold, but 10 MeV, although going down, is still above the 10.0 pfu treshold. Geomagnetic conditions where quiet to moderate. The interplanetary magnetic field Bz component is currently low, but turbulent which could indicate the arrival of the May 20th CME. A jump in solar wind speed is not expected with this CME. Major Storm conditions (K >= 6) are expected on May 25th around 17:00 UT due to the arrival of the CME of May 22.

Today's estimated international sunspot number (ISN): 074, based on 12 stations.

Solar indices for 23 May 2013

Wolf number Catania	120
10cm solar flux	135
AK Chambon La Forêt	015
AK Wingst	011
Estimated Ap	010
Estimated international sunspot number	074 - Based on 18 stations

Noticeable events summary

Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive

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