Viewing archive of Saturday, 18 July 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Jul 18 1232 UTC

SIDC Forecast

Solar flares

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
18 Jul 2015	095	006
19 Jul 2015	095	008
20 Jul 2015	095	018

Bulletin

The Sun produced no C flares during the past 24 hours. B flaring is expected, with a chance for a C flare. During the past 24 hours, solar wind speed further decreased from about 400 to 340 km/s, while the magnitude of the Interplanetary Magnetic Field varied between about 1 and 4 nT. Bz was never below -4 nT for an extended period. Over the past 24 hours, geomagnetic conditions have been quiet to unsettled (K Dourbes between 0 and 3; NOAA Kp between 0 and 2). Quiet geomagnetic conditions (K Dourbes < 3) are expected on July 18 and 19. Quiet to unsettled levels with active (K Dourbes = 4) excursions are possible on July 20 due to the expected arrival of a coronal hole high speed stream.

Today's estimated international sunspot number (ISN): 062, based on 20 stations.

Solar indices for 17 Jul 2015

Wolf number Catania	///
10cm solar flux	097
AK Chambon La Forêt	007
AK Wingst	005
Estimated Ap	005
Estimated international sunspot number	052 - Based on 29 stations

Noticeable events summary

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

All times in UTC

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