Viewing archive of Friday, 3 August 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Aug 03 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
03 Aug 2018	070	009
04 Aug 2018	071	011
05 Aug 2018	072	010

Bulletin

Solar activity was at very low levels. Region NOAA 2717 decayed, leaving the Sun spotless. Another active region is just beyond the east limb. This returning region was spotless during the previous rotation, raising the 10.7cm radio flux with a few solar flux units. No earth- directed 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 varied between 350 and 410 km/s (DSCOVR). Bz gradually changed from values near +6 nT at the beginning of the period to -4 nT around 09UT. The direction of the interplanetary magnetic field was variable, ending the period in a positive sector (away from the Sun). Quiet to unsettled geomagnetic conditions were observed.

Geomagnetic activity is expected to continue at quiet to unsettled levels until 4 or 5 August when a weak wind stream associated with a small negative polarity equatorial coronal hole (CH) may start influencing the earth environment. An isolated active episode is then possible.

Today's estimated international sunspot number (ISN): 000, based on 21 stations.

Solar indices for 02 Aug 2018

Wolf number Catania	///
10cm solar flux	070
AK Chambon La Forêt	009
AK Wingst	007
Estimated Ap	006
Estimated international sunspot number	012 - 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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