Viewing archive of Friday, 18 October 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Oct 18 1243 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Warning condition (activity levels expected to increase, but no numeric forecast given)

	10cm flux	Ap
18 Oct 2013	136	007
19 Oct 2013	134	007
20 Oct 2013	132	007

Bulletin

Solar activity has been moderate, many C-class flares coming mostly from NOAA AR 1875 that rotated into view over the eastern limb and has magnetic beta configuration. NOAA AR 1865 has simplified to a beta configuration but it is still producing C-class flares. AR 1861 is about to rotate over the western limb, but remains very active, it produced an M1.2 flare peaking at 15:41 UT on October 17. A faint narrow CME was associated with this flare, not expected to arrive to the Earth. Geomagnetic conditions have been quiet and are expected to remain so.

Today's estimated international sunspot number (ISN): 116, based on 08 stations.

Solar indices for 17 Oct 2013

Wolf number Catania	///
10cm solar flux	136
AK Chambon La Forêt	014
AK Wingst	011
Estimated Ap	012
Estimated international sunspot number	105 - Based on 21 stations

Noticeable events summary

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

All times in UTC

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