Viewing archive of Thursday, 30 May 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 May 30 1239 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
30 May 2013	110	002
31 May 2013	110	031
01 Jun 2013	110	026

Bulletin

Solar activity was low during the past 24 hours. There was only one C2.8-class flare originating from a new active region NOAA AR 1760, which just rotated behind the east limb. Catania regions 82 and 83 (resp NOAA AR 1756 and 1755) have a simple magnetic beta configuration and are further decreasing in size. No Earth directed CMEs are detected. C-class flaring conditions are expected for the next 48 hours, mainly originating from NOAA AR 1760. The solar wind further slowed down to a speed of 400 km/s. The interplanetary magnetic field is stable with a magnitude of less than 5 nT. Geomagnetic conditions are quiet (local K<3 at Dourbes). This situation is expected to remain so for the next few hours till the arrival of the fast flow from the coronal hole in the centre of the solar disk. This might result in geomagnetically active to minor storm levels (K= 4 to 5).

Today's estimated international sunspot number (ISN): 052, based on 08 stations.

Solar indices for 29 May 2013

Wolf number Catania	086
10cm solar flux	107
AK Chambon La Forêt	005
AK Wingst	002
Estimated Ap	002
Estimated international sunspot number	052 - Based on 13 stations

Noticeable events summary

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

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