Viewing archive of Saturday, 23 February 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Feb 23 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
23 Feb 2019	071	003
24 Feb 2019	071	003
25 Feb 2019	071	005

Bulletin

Solar activity was at very low levels. The dynamic, 20-degrees long filament is now located near N15W35. 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 equatorial coronal hole is transiting the central meridian.

Solar activity is expected to remain at very low levels.

The earth environment has exited the wind stream from the positive polarity coronal hole (CH). Solar wind speed declined from 460 to 370 km/s (DSCOVR). Bz varied between -2 and +3 nT. The interplanetary magnetic field was directed mostly away from the Sun (positive sector) after 19:30UT. Geomagnetic activity was at quiet levels.

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

Today's estimated international sunspot number (ISN): 000, based on 24 stations.

Solar indices for 22 Feb 2019

Wolf number Catania	000
10cm solar flux	071
AK Chambon La Forêt	006
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	000 - Based on 20 stations

Noticeable events summary

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

All times in UTC

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