Viewing archive of Sunday, 9 August 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Aug 09 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
09 Aug 2015	120	008
10 Aug 2015	120	008
11 Aug 2015	120	007

Bulletin

Two C-class flares were recorded during the past 24 hours, originating from NOAA active region 2396. The strongest flare was a C4.2 flare, peaking at 7:52 UT. An eruption also occurred near NOAA active region 2393 close to the West limb, peaking at 11:44 UT in SDO/AIA. Coronagraphic imagery is not yet available to analyze any potential CME.

Three CMEs, with first measurements at 20:36 UT and 22:24 UT (on August 7), 00:12 UT (on August 8), were related to eruptions in the Southeast and the Northwest quadrant. The third CME was the strongest one having an apparent width of about 160 degrees. These CMEs have no Earth-bound component, so no geomagnetic consequences are expected.

Flares at the C-level are expected. Also an M-class flare is possible, but not very likely.

The solar wind speed has values varying from 460 to 570 km/s and the magnitude of the interplanetary magnetic field (IMF) is below 10 nT. Geomagnetic conditions are quiet to unsettled, at global (estimated NOAA Kp) and local (Dourbes) levels, and are expected to remain so.

Today's estimated international sunspot number (ISN): 070, based on 18 stations.

Solar indices for 08 Aug 2015

Wolf number Catania	///
10cm solar flux	121
AK Chambon La Forêt	019
AK Wingst	014
Estimated Ap	014
Estimated international sunspot number	089 - Based on 27 stations

Noticeable events summary

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

All times in UTC

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