Viewing archive of Wednesday, 6 August 2014

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2014 Aug 06 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
06 Aug 2014	140	010
07 Aug 2014	140	011
08 Aug 2014	140	012

Bulletin

The solar activity remains low with only small C-class flares reported in the past 24h. These flares mostly occurred in NOAA AR 2132, which is currently the most active region on the solar disk. More flaring at C-class level is expected from NOAA AR 2132 and 2134, with a small chance for a low M-class flare. A type II radio burst was observed in Humain on August 5 at 15:50. It was related to a C1.1 flare at location N11E51, close to NOAA AR 2134 and to a narrow CME observed by LASCO at 16:24 UT towards the north-east. This CME is not earth-directed. A wide CME was observed in LASCO at 04:36 UT today after a long data gap. This CME was probably associated to an eruption in NOAA AR 2121, which has already turned over the west limb, but is visible in STEREO images around 20:00 UT on August 5. At that time SDO images also show erupting loops behind the west limb. This CME is thus back-sided and will not affect the earth. Geomagnetic conditions have been quiet to unsettled (K up to 3). We expect a return to quiet conditions. Late on August 7 and on August 8, unsettled to active conditions (K max 4) are possible due to the expected arrival of a coronal hole fast wind stream.

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

Solar indices for 05 Aug 2014

Wolf number Catania	///
10cm solar flux	139
AK Chambon La Forêt	018
AK Wingst	011
Estimated Ap	012
Estimated international sunspot number	089 - Based on 24 stations

Noticeable events summary

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

All times in UTC

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