Viewing archive of Wednesday, 5 August 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Aug 05 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
05 Aug 2015	110	008
06 Aug 2015	115	010
07 Aug 2015	120	019

Bulletin

Solar flaring activity once more was very low. A few narrow CMEs were observed in coronagraphic data. The most interesting one being a CME travelling Northwards, related to a filament eruption, with first measurement at 14:24 UT in LASCO-C2. None of the CMEs is Earth-directed. The chances for flares at the C-level are increasing (40%). Even an M-class flare from NOAA active regions 2394 or 2396 is possible, though is not likely.

Geomagnetic conditions were quiet to unsettled (K=0 to 3) at global (NOAA estimated Kp) and local level (Dourbes), with solar wind speeds around 400 km/s and interplanetary magnetic field magnitudes near 5 nT. A similar situation is expected for the next 24 hours. The arrival of a high speed stream from a small recurrent equatorial coronal hole might result in disturbed geomagnetic levels up to active (K=4) or even minor storm levels (K=5) on August 7.

Today's estimated international sunspot number (ISN): 087, based on 22 stations.

Solar indices for 04 Aug 2015

Wolf number Catania	///
10cm solar flux	107
AK Chambon La Forêt	014
AK Wingst	010
Estimated Ap	009
Estimated international sunspot number	087 - Based on 31 stations

Noticeable events summary

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

All times in UTC

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