Visualizzazione archivio di sabato, 4 aprile AM

Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2015 Apr 04 1230 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
04 Apr 2015	119	013
05 Apr 2015	118	013
06 Apr 2015	116	011

Bulletin

Four sunspot groups are currently visible on the solar disk. The strongest flare during the past 24 hours was the B9.8 flare peaking at 00:33 UT in the NOAA AR 2318 (Catania number 21). We expect further flaring activity up to C-level from this group. A weak full halo CME was first seen in the LASCO C2 field of view at 12:48 UT on April 3. Due to absence of EUV signatures of the CME in the SDO/AIA data at that time, we believe this CME is a far side event that will therefore not arrive at the Earth. The Earth is currently inside the fast flow from the trans-equatorial coronal hole. The solar wind speed is around 530 km/s. As the interplanetary magnetic field magnitude has decreased to values around 6 nT, the geomagnetic conditions are on the quiet to unsettled level, and are expected to remain so.

Today's estimated international sunspot number (ISN): 042, based on 08 stations.

Solar indices for 03 Apr 2015

Wolf number Catania	053
10cm solar flux	120
AK Chambon La Forêt	019
AK Wingst	013
Estimated Ap	013
Estimated international sunspot number	020 - Based on 14 stations

Noticeable events summary

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

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