Viewing archive of Friday, 23 October 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Oct 23 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
23 Oct 2015	115	006
24 Oct 2015	110	012
25 Oct 2015	105	016

Bulletin

Solar activity was low without any significant flare. NOAA active region 2436 remains the most complex region, but was inactive. The > 10 MeV proton flux was enhanced from 23:00 UT on, but remained well below the event threshold. This disturbance probably was due to the long duration flare of October 22. Flaring at the C-level is expected. No Earth-directed CMEs were observed in current available coronagraphic images.

The solar wind speed was at 400 km/s till 22UT, when the speed became variable between 400 and 500 km/s. The interplanetary magnetic field was at a constant magnitude around 5 nT. Quiet (K<3) to unsettled (K=3) geomagnetic conditions were observed, which are expected to continue for the next 24 hours. From the second half of October 24 the solar wind might be disturbed due to a glancing blow from the October 22 CME. This can result in (at maximum) minor storm (K=5) conditions.

Today's estimated international sunspot number (ISN): 090, based on 08 stations.

Solar indices for 22 Oct 2015

Wolf number Catania	///
10cm solar flux	121
AK Chambon La Forêt	012
AK Wingst	006
Estimated Ap	005
Estimated international sunspot number	095 - Based on 19 stations

Noticeable events summary

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

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