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Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2016 May 30 1230 UTC

SIDC Forecast

Сонячні спалахи

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

Geomagnetism

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

Сонячні протони

Quiet

	10cm flux	Ap
30 May 2016	080	015
31 May 2016	075	014
01 Jun 2016	075	010

Bulletin

A new active region (AR) NOAA 2550 has developed rapidly during the past few hours. Solar flaring activity was restricted to a C1.4 flare (peaking at 7:37 UT, originating from NOAA AR 2550) and several B-class flares. The C1.4 flare was associated with a type II burst, observed at Humain. No Earth directed coronal mass ejections (CMEs) were observed.

The probability for a C-class flare is increasing, with mainly NOAA AR 2550 as source candidate. The Earth is currently under the influence of a coronal hole (CH) high speed stream (HSS). Solar wind speed increased from 450 km/s, reaching a maximum of 600 km/s and is currently around 500 km/s. Bz ranged from -5 and +5 nT, with a maximum magnitude of the interplanetary magnetic field (IMF) of 8 nT. The IMF was directed towards the Sun. Quiet (K=0-2) to unsettled (K=3) conditions were registered at the local level (Dourbes). Some episodes with active conditions are expected over the next 24 hours.

Today's estimated international sunspot number (ISN): 047, based on 10 stations.

Solar indices for 29 May 2016

Wolf number Catania	///
10cm solar flux	083
AK Chambon La Forêt	018
AK Wingst	007
Estimated Ap	008
Estimated international sunspot number	030 - Based on 20 stations

Noticeable events summary

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

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