Viewing archive of Tuesday, 9 August 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 Aug 09 1236 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
09 Aug 2016	096	021
10 Aug 2016	099	014
11 Aug 2016	100	008

Bulletin

The strongest flare, out of three C-class flares reported during last 24 hours, was the C8.9 flare (peaked at 00:34 UT) on August 09. The flare originated from the NOAA AR 2574 situated close to the East solar limb, and was associated with narrow and slow CME. In the coming hours we expect C-class flares and possibly, but not very probably, an isolated M-class flare. No Earth directed CMEs were observed in the last 24 hours.

The Earth is presently inside the fast solar wind with the speed of about 650 km/s, and the interplanetary magnetic filed magnitude amounts 7 nT. At about 09:00 UT this morning the solar wind speed started to increase, simultaneously with the fluctuations of the Bz component of the interplanetary magnetic field. This indicates arrival of the fast flow, probably associated with the large northern polar coronal hole with the extent to the low latitudes (which reached central meridian on August 06). The fast flow could induce active to minor storm geomagnetic conditions in the coming hours.

Today's estimated international sunspot number (ISN): 073, based on 24 stations.

Solar indices for 08 Aug 2016

Wolf number Catania	///
10cm solar flux	096
AK Chambon La Forêt	017
AK Wingst	014
Estimated Ap	014
Estimated international sunspot number	082 - Based on 31 stations

Noticeable events summary

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

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