Viewing archive of Thursday, 12 May 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 May 12 1238 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Solar protons

Quiet

	10cm flux	Ap
12 May 2016	091	005
13 May 2016	092	006
14 May 2016	093	005

Bulletin

Over the past 24 hours solar activity has been very low. The largest flare was a B8.2 class flare, produced by Active Region (AR) 2542 (Gai:Beta), which peaked at 14:22 UT today. There are three other inactive ARs on the solar disk (AR 2543, AR 2544, AR 2545). No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with a probability of C-class flares. The solar wind parameters variations are decaying after the influence of the negative polarity coronal hole effects. The solar wind speed has decreased till approximately 400 km/s over the past 24 hours. The total magnetic field strength magnitude has decreased till 4-5 nT. The Bz component of magnetic field has been mostly negative over the past 24 hours, varying between +2 and -4 nT. Geomagnetic conditions ranged between Kp index 1-2 (NOAA) and local K index 1-3 (Dourbes) over the past 24 hours. Geomagnetic activity is expected to remain low within next 2 days.

Today's estimated international sunspot number (ISN): 083, based on 16 stations.

Solar indices for 11 May 2016

Wolf number Catania	///
10cm solar flux	094
AK Chambon La Forêt	010
AK Wingst	008
Estimated Ap	006
Estimated international sunspot number	077 - Based on 25 stations

Noticeable events summary

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

All times in UTC

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