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Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2019 Feb 22 1231 UTC

SIDC Forecast

Сонячні спалахи

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

Geomagnetism

Quiet (A<20 and K<4)

Сонячні протони

Quiet

	10cm flux	Ap
22 Feb 2019	070	005
23 Feb 2019	070	006
24 Feb 2019	070	003

Bulletin

Solar activity was at very low levels. The dynamic filament, now located near N15W20, has grown to a length of about 20 degrees. No earth- directed coronal mass ejections (CMEs) have been observed over the last 24 hours. The greater than 10 MeV proton flux was at nominal values. A negative polarity equatorial coronal hole has started its transit of the central meridian.

Solar activity is expected to remain at very low levels.

The earth environment remained under the influence of the wind stream from the positive polarity coronal hole (CH). Solar wind speed was fairly steady, varying mostly between 440 and 470 km/s with a 1-hour high near 500 km/s shortly after midnight (DSCOVR). Bz oscillated between -5 and +6 nT. The interplanetary magnetic field was directed away from the Sun (positive sector) until 06UT, moving into a negative sector afterwards. Geomagnetic activity was at quiet to unsettled levels.

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

Today's estimated international sunspot number (ISN): 000, based on 13 stations.

Solar indices for 21 Feb 2019

Wolf number Catania	013
10cm solar flux	071
AK Chambon La Forêt	020
AK Wingst	013
Estimated Ap	013
Estimated international sunspot number	000 - Based on 21 stations

Noticeable events summary

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

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