Viewing archive of Monday, 30 July 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Jul 30 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
30 Jul 2018	068	005
31 Jul 2018	068	006
01 Aug 2018	068	008

Bulletin

Solar activity was at very low levels. A B1 flare peaking at 21:48UT on 29 July had its source in the spotless faculae field near S08E65. 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 gradually declined from about 330 to 275 km/s by 10:30UT, then increased to values around 330 km/s (DSCOVR). Bz varied mostly between -4 and +5 nT, being predominately negative during the first half of the period. The interplanetary magnetic field was mostly directed towards the Sun. Mostly quiet geomagnetic conditions were observed, with unsettled conditions recorded by Dourbes during the 18-21UT and 06-09UT intervals.

Mostly quiet geomagnetic conditions are expected, with a chance on an isolated unsettled episode.

Today's estimated international sunspot number (ISN): 000, based on 27 stations.

Solar indices for 29 Jul 2018

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	///
AK Wingst	006
Estimated Ap	005
Estimated international sunspot number	000 - Based on 28 stations

Noticeable events summary

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

All times in UTC

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