Viewing archive of Friday, 31 July 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Jul 31 1230 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
31 Jul 2015	102	022
01 Aug 2015	104	017
02 Aug 2015	106	007

Bulletin

Solar activity is low, no C-class flares in past 24 h and the situation is not expected to change in the coming hours.

The Earth is under the influence of a fast speed stream emanating from a coronal hole, solar wind speeds are around 500 km/s with interplanetary magnetic field magnitudes of 10 nT. Active conditions were observed overnight and more active to minor storm periods can be expected in the next 48 hours.

Today's estimated international sunspot number (ISN): 080, based on 25 stations.

Solar indices for 30 Jul 2015

Wolf number Catania	100
10cm solar flux	102
AK Chambon La Forêt	024
AK Wingst	020
Estimated Ap	017
Estimated international sunspot number	086 - Based on 35 stations

Noticeable events summary

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

All times in UTC

<< Go to daily overview page