Viewing archive of Thursday, 15 August 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Aug 15 1220 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
15 Aug 2013	127	015
16 Aug 2013	127	013
17 Aug 2013	125	007

Bulletin

There is a small risk for C class flares from NOAA ARs 1817, 1818 and 1819, keeping the solar activity level to eruptive. A southern polar crown filament erupted on August 14, around 1900UT. It was associated with a CME, which appears not to be geoeffective. Geomagnetic activity is expected to remain at unsettled levels for the next 24 hours, and then to return to quiet conditions on Aug. 17. Current ACE observations show that the Earth is still within a fast solar wind stream linked to the northern coronal hole on the Sun.

Today's estimated international sunspot number (ISN): 084, based on 11 stations.

Solar indices for 14 Aug 2013

Wolf number Catania	///
10cm solar flux	125
AK Chambon La Forêt	021
AK Wingst	014
Estimated Ap	013
Estimated international sunspot number	076 - Based on 20 stations

Noticeable events summary

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

All times in UTC

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