Viewing archive of Wednesday, 8 April 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Apr 08 1230 UTC

SIDC Forecast

Solar flares

Eruptive (C-class flares expected, probability >=50%)

Geomagnetism

Minor storm expected (A>=30 or K=5)

Solar protons

Quiet

	10cm flux	Ap
08 Apr 2015	109	012
09 Apr 2015	108	020
10 Apr 2015	108	021

Bulletin

Beta-delta region NOAA AR 2320 released two low C flares during the past 24 hours. The strongest flare was a C1.1 flare which peaked at 21:31 UT on April 7. In the next 24 hours, more C flaring is expected, with a slight chance for an M flare, especially from AR 2320. Solar wind speed further decreased from about 400 to 350 km/s over the past 24 hours, while the Interplanetary Magnetic Field magnitude varied between 2 and 6 nT. Over the past 24 hours, geomagnetic conditions have been quiet (K Dourbes between 0 and 3; NOAA Kp between 1 and 2). There is a chance for active geomagnetic levels (K Dourbes = 4) on April 8 due to a possible glancing blow of the partial halo CME of April 4. Active to minor storm (K Dourbes = 5) intervals are possible in the second half of April 9, as a result of a glancing blow from the CME of April 6. Quiet to active geomagnetic activity is possible on April 10, as a new coronal hole high speed stream is expected to arrive near Earth.

Today's estimated international sunspot number (ISN): 032, based on 18 stations.

Solar indices for 07 Apr 2015

Wolf number Catania	///
10cm solar flux	111
AK Chambon La Forêt	006
AK Wingst	004
Estimated Ap	004
Estimated international sunspot number	038 - Based on 32 stations

Noticeable events summary

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

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