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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2016 Apr 29 1231 UTC

SIDC Forecast

Sluneční erupce

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

Geomagnetism

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

Sluneční protony

Quiet

	10cm flux	Ap
29 Apr 2016	095	007
30 Apr 2016	098	017
01 May 2016	100	007

Bulletin

One C-class flare in past 24 h: C1.9 peaking at 12:51 UT on April 28, from NOAA 2535 (Catania 63). More C-class flares are likely.

Several CMEs occurred in the past 24 h, directed towards the north-east. Two of them on April 28, originated in the vicinity of NOAA AR 2335 (Catania 63). These are not remarkable events, but due to the proximity of the AR to the solar disk center, they require some attention. The first one at 02:12 UT (LASCO-C2) was very slow and faint, no Earth effect is expected. The second one at 07:12 UT was also slow and most likely will not affect the Earth, but a glancing blow around May 2 cannot be discarded. A filament erupted from the eastern limb at 12:00 UT on April 28 (after a slow rise), the corresponding CME is not expected to affect Earth. Finally, on April 29, a CME erupted at 05:00 UT, this event is probably backsided (more data needed) and will not affect the Earth.

Geomagnetic conditions have been quiet. The solar wind speed is at 375 km/s with interplanetary magnetic field magnitude around 5 nT. The arrival of a fast speed stream within 48 h is expected to create minor storm conditions.

Today's estimated international sunspot number (ISN): 082, based on 15 stations.

Solar indices for 28 Apr 2016

Wolf number Catania	///
10cm solar flux	095
AK Chambon La Forêt	006
AK Wingst	004
Estimated Ap	004
Estimated international sunspot number	094 - Based on 32 stations

Noticeable events summary

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

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