Viewing archive of Wednesday, 20 August 2014

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2014 Aug 20 0945 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
20 Aug 2014	113	004
21 Aug 2014	115	004
22 Aug 2014	117	004

Bulletin

There are 6 active regions on the visible side of the solar disk. Only NOAA AR 12146 (in NE quadrant) has shown a significant growth in the past 24 hours. We expect it will push up solar activity to C-class flaring levels, though further growth in size, complexity and thus flaring levels cannot be excluded. Note also that flaring activity is observed from behind the NE solar limb. Quiet geomagnetic conditions are expected in the coming 3 days: there are no high speed wind streams expected from coronal holes, nor are there any new CMEs on the way to the Earth. The arrival yesterday (Aug 19) of the Aug 15 CME resulted in a Kp=6 episode. The Bz component of the IMF has now turned fully Northward, thereby ending the geomagnetic storm.

Today's estimated international sunspot number (ISN): 075, based on 10 stations.

Solar indices for 19 Aug 2014

Wolf number Catania	///
10cm solar flux	111
AK Chambon La Forêt	///
AK Wingst	020
Estimated Ap	019
Estimated international sunspot number	069 - Based on 25 stations

Noticeable events summary

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

All times in UTC

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