Viewing archive of Monday, 25 November 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Nov 25 1231 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
25 Nov 2019	070	006
26 Nov 2019	070	008
27 Nov 2019	070	015

Bulletin

Solar activity was at very low levels. The Sun was spotless again. No earth-directed coronal mass ejections (CMEs) have been observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal values. A negative polarity coronal hole (CH) in the southern hemisphere has finished its transit of the central meridian.

Solar activity is expected to remain at very low levels.

Solar wind speed declined from initial values around 480 km/s to 410 km/s at the end of the period (ACE), reflecting the weakening wind stream from a positive polarity coronal hole. Bz varied between -4 and + 3 nT. The interplanetary magnetic field (phi angle) was mostly directed away from the Sun (positive sector). Kp and K Dourbes recorded quiet to unsettled geomagnetic conditions.

Geomagnetic activity is expected to remain mostly at quiet to unsettled levels. As the earth environment is expected to become affected by the wind streams from patchy, negative polarity coronal holes during the next few days (26-27 November), an active episode is not excluded.

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

Solar indices for 24 Nov 2019

Wolf number Catania	///
10cm solar flux	071
AK Chambon La Forêt	///
AK Wingst	014
Estimated Ap	011
Estimated international sunspot number	000 - Based on 15 stations

Noticeable events summary

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

All times in UTC

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