Viewing archive of Friday, 29 August 2014

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2014 Aug 29 1255 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Solar protons

Quiet

	10cm flux	Ap
29 Aug 2014	110	016
30 Aug 2014	107	017
31 Aug 2014	105	007

Bulletin

Currently the solar activity is low. Only a few C-class flares were observed originating from NOAA AR 2146. A filament located from N60W35 to N15W35 erupted from 15 UT on August 28 onwards. This eruption is associated with a faint CME visible in SOHO/LASCO C2 from 15:48 UT on. A halo CME was observed in SOHO/LASCO C2 and STEREO B/COR2 imagery, with first measurements at 17:36 UT and 17:54 UT respectively. This CME is related to a backsided event. None of these CMEs is Earth directed. Flaring activity is expected to remain low for the next 48 hours. The magnitude of the interplanetary magnetic field (measured by ACE) has declined to about 7 nT with a fluctuating Bz component. The solar wind speed increased to currently 450 km/s. Geomagnetic conditions currently are at unsettled (local K up to 3 at Dourbes) to minor storm levels (NOAA Kp up to 5). Unsettled to active conditions are expected for the remainder of the day and tomorrow due to combined effects from the ICME and increasing solar wind speed related to the equatorial coronal hole.

Today's estimated international sunspot number (ISN): 047, based on 14 stations.

Solar indices for 28 Aug 2014

Wolf number Catania	///
10cm solar flux	119
AK Chambon La Forêt	028
AK Wingst	024
Estimated Ap	027
Estimated international sunspot number	060 - Based on 25 stations

Noticeable events summary

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

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