Viewing archive of Tuesday, 23 July 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Jul 23 1232 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
23 Jul 2013	112	007
24 Jul 2013	114	005
25 Jul 2013	117	018

Bulletin

Six sunspot groups are reported by Catania today. C-class flares are possible in Catania sunspot groups 33, 35, and 38. Catania sunspot group 33 (NOAA AR 1793) evolved from beta-gamma to beta configuration of its photospheric magnetic field. Catania sunspot group 35 (NOAA AR 1800) shows evidence of emerging magnetic flux. Catania sunspot group 38 (no NOAA number yet) just appeared from behind the east solar limb. The Earth is currently inside a slow (around 380 km/s) solar wind flow with average (4-5 nT) interplanetary magnetic field magnitude. We expect quiet geomagnetic conditions in the coming hours. On July 25 we expect the arrival of the fast flow from the equatorial coronal hole, possibly resulting in active geomagnetic conditions.

Today's estimated international sunspot number (ISN): 052, based on 15 stations.

Solar indices for 22 Jul 2013

Wolf number Catania	054
10cm solar flux	110
AK Chambon La Forêt	015
AK Wingst	009
Estimated Ap	008
Estimated international sunspot number	038 - Based on 20 stations

Noticeable events summary

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

All times in UTC

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