Viewing archive of Sunday, 28 August 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 Aug 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 Aug 2016	084	007
29 Aug 2016	084	038
30 Aug 2016	084	011

Bulletin

Solar activity was very low. Just a single B2.5 flare was reported from region NOAA 2582. This region newly emerged just South-East of former region 2597. Some new flux emergence and spot formation was also recorded in NOAA 2580 by the end of the period while NOAA 2581 showed consolidation of its leading spot. X-ray flux is expected to remain below C level with a chance for an isolated C flare. Proton flux levels are at background values and expected to remain so. No Earth directed CMEs have been observed in coronagraph data.

Nominal solar wind conditions were observed with solar wind speed slowly decreasing to around 400 km/s. Total magnetic field was at or below 5nT with a variable Bz component. The magnetic field phi angle indicated a negative sector throughout the period. Solar wind conditions are expected to see later today or early tomorrow a sector boundary crossing into a positive sector (away from the Sun) followed by the onset of a high speed stream from the transequatorial coronal hole.

Geomagnetic conditions were quiet (both local K Dourbes and NOAA Kp 0-2). Geomagnetic conditions will become enhanced over the next 24 hours as a consequence of the sector boundary crossing and the coronal hole high speed stream. First up to active and later up to minor storm levels must be expected.

Today's estimated international sunspot number (ISN): 058, based on 19 stations.

Solar indices for 27 Aug 2016

Wolf number Catania	///
10cm solar flux	084
AK Chambon La Forêt	006
AK Wingst	005
Estimated Ap	005
Estimated international sunspot number	056 - Based on 29 stations

Noticeable events summary

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

All times in UTC

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