Viewing archive of Thursday, 28 May 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 May 28 1230 UTC

SIDC Forecast

Solar flares

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
28 May 2015	098	014
29 May 2015	102	014
30 May 2015	105	010

Bulletin

One single C1 flare was observed from Catania sunspot region 74, which is a new region near the East limb at S15. A sequence of small eruptions continued near plage 2351 (N25W60). No Earth-bound CMEs were observed. The chance for C-class flares is increasing.

Earth is inside a slow solar wind (max 340 km/s) with a nominal magnitude of the interplanetary magnetic field (max 10 nT). Geomagnetic conditions are quiet (K <4) and are expected to increase within the next 24 hours to active conditions (K=4) due to the influence of a high speed stream.

Today's estimated international sunspot number (ISN): 009, based on 16 stations.

Solar indices for 27 May 2015

Wolf number Catania	///
10cm solar flux	095
AK Chambon La Forêt	014
AK Wingst	006
Estimated Ap	006
Estimated international sunspot number	021 - 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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