Viewing archive of Tuesday, 31 July 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Jul 31 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
31 Jul 2018	068	005
01 Aug 2018	068	008
02 Aug 2018	068	006

Bulletin

Solar activity was at very low levels. A small filament located at N15E20 slowly erupted on 31 July between 04 and 07UT. No x-ray flaring or obvious coronal dimming was associated with the event. No coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels.

Solar activity is expected to remain at very low levels.

Solar wind speed varied between 300 and 340 km/s (DSCOVR). Bz was mostly negative during the first half of the period, and positive during the second half, varying between -6 and +5 nT. The interplanetary magnetic field turned to a predominately away direction (positive sector) around 01UT. Mostly quiet geomagnetic conditions were observed, with some unsettled intervals recorded by Dourbes.

Mostly quiet to unsettled geomagnetic conditions are expected.

Today's estimated international sunspot number (ISN): 000, based on 20 stations.

Solar indices for 30 Jul 2018

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	///
AK Wingst	007
Estimated Ap	005
Estimated international sunspot number	000 - Based on 37 stations

Noticeable events summary

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

All times in UTC

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