Viewing archive of Sunday, 1 September 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Sep 01 1210 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
01 Sep 2013	109	022
02 Sep 2013	110	013
03 Sep 2013	111	008

Bulletin

Solar activity was eruptive featuring 1 C-class flare (C2.6) originating from AR NOAA 11836. Both AR NOAA 11835 and NOAA 11836 have a possibility in producing M-class flares. A partial halo CME was detected by LASCO C2 on August 31st around 20:48 UT which could be assiociated with the C2.6 flare. This CME is mainly westward directed (possibly only a glancing blow) and due to the relative slow speed of 400 km/s will probably not have any influence on geomagnetic conditions. Current solar wind speed is around 550 km/s and the interplanetary magnetic field Bz component is around 0 nT. Geomagnetic conditions where quiet in the past 24 hours, but the CME of August 30th 2:48 UT might still arrive and potentially result in minor storm levels (K=5). The CME of of August 29th 06:00 UT is expected to arrive with a shock on September 2d in the evening resulting in active conditions (K=4).

Today's estimated international sunspot number (ISN): 049, based on 07 stations.

Solar indices for 31 Aug 2013

Wolf number Catania	///
10cm solar flux	108
AK Chambon La Forêt	021
AK Wingst	013
Estimated Ap	014
Estimated international sunspot number	052 - Based on 20 stations

Noticeable events summary

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

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