Viewing archive of Monday, 26 October 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Oct 26 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
26 Oct 2015	105	007
27 Oct 2015	103	007
28 Oct 2015	102	007

Bulletin

Solar activity has been low with the biggest flare of the period an isolated C2.1 flare from NOAA active region 2437. The most prominent region on disk, NOAA active region 2436 experienced some new opposite flux emergence in the trailing spot. Although some isolated C flaring is quite possible, we expect mainly quiet conditions. No Earth directed CMEs have been recorded. Solar wind speed remained elevated in the range of 400-500km/s. Around 13:50 UT a peak of around 12nT was measured in the total magnetic field after wich it declined steadily to a value of currently around 6.5 nT. Bz was mainly positive. The magnetic field phi angle settled steadily in a positive sector. Geomagnetic conditions were quiet to unsettled (both NOAA Kp and local K Dourbes 0-3). Solar wind conditions are expected to further restore towards nominal conditions. Associated quiet to unsettled geomagnetic conditions are expected.

Today's estimated international sunspot number (ISN): 075, based on 20 stations.

Solar indices for 25 Oct 2015

Wolf number Catania	///
10cm solar flux	106
AK Chambon La Forêt	///
AK Wingst	007
Estimated Ap	008
Estimated international sunspot number	064 - Based on 21 stations

Noticeable events summary

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

All times in UTC

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