Viewing archive of Tuesday, 31 May 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 May 31 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
31 May 2016	085	006
01 Jun 2016	085	007
02 Jun 2016	090	007

Bulletin

There are four active regions visible on the solar disk. NOAA active region 2550 and new region 2551 were responsible for some minor flaring, including a single C1.0 flare (from NOAA 2550, peaking at 13:24). NOAA 2548 is rounding the west limb. An isolated C-class flare may occur, but no major flares are expected. No Earth-directed coronal mass ejections (CMEs) were observed.

ACE observations indicate the weakening influence of the high speed stream (HSS). The solar wind speed has decreased to about 450 km/s, the magnitude of the magnetic field reached maximally 6 nT, with a fluctuating Bz. Geomagnetic conditions were quiet to unsettled (maximum K=3), both at local (Dourbes) and global levels (Potzdam, NOAA), which is expected to remain so.

Today's estimated international sunspot number (ISN): 035, based on 14 stations.

Solar indices for 30 May 2016

Wolf number Catania	///
10cm solar flux	086
AK Chambon La Forêt	012
AK Wingst	014
Estimated Ap	013
Estimated international sunspot number	042 - Based on 19 stations

Noticeable events summary

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

All times in UTC

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