Viewing archive of Thursday, 6 August 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Aug 06 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Minor storm expected (A>=30 or K=5)

Solar protons

Quiet

	10cm flux	Ap
06 Aug 2015	115	019
07 Aug 2015	120	014
08 Aug 2015	120	010

Bulletin

Solar activity was very low, with one single C1.0 flare originating from NOAA active region 2396. No Earth-directed CMEs were observed. Flaring activity at the C-level is expected. Also an M-class flare is possible, though not likely.

The solar wind speed measured by ACE started to increase at 6:20 UT on August 6 from 400 km/s to currently about 500 km/s. The interplanetary magnetic field (IMF) magnitude is enhanced (up to 12 nT) in association with the apparent sector boundary crossing that occurred around 6UT. This indicates the arrival of the interaction region between the slow and fast solar wind flows, with the fast flow emanating from the small equatorial coronal hole. The geomagnetic conditions are currently quiet at planetary level and unsettled to active at local level (Dourbes). Geomagnetic disturbances at active (K=4) to minor storm levels (K = 5) may occur later today or early tomorrow.

Today's estimated international sunspot number (ISN): 106, based on 27 stations.

Solar indices for 05 Aug 2015

Wolf number Catania	///
10cm solar flux	112
AK Chambon La Forêt	010
AK Wingst	007
Estimated Ap	006
Estimated international sunspot number	088 - Based on 35 stations

Noticeable events summary

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

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