Перегляд архіву четвер, 21 листопада 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2019 Nov 21 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
21 Nov 2019	070	012
22 Nov 2019	070	021
23 Nov 2019	070	005

Bulletin

The solar activity has been at very low levels over the past 24 hours. The Sun is currently spotless and the X-ray flux remains below B-level. However, a compact bright structure, located at low-latitude near the central meridian, has shown some evidence of activity. There is currently a low-latitude positive-polarity patchy coronal hole located in the Western Hemisphere. Solar activity is expected to remain at low levels for the next 24 hours.

There was a small filament eruption in the north west quadrant of the Sun. The eruption was observed to be moving predominantly to the west in coronagraph imagery. The plane-of-sky speed, as measure by CACTUS, reached around 650 km/s, and although the effects are expected to be small, the CME may arrive around mid day on 23-Nov-2019.

The greater than 10 MeV proton flux was at nominal values.

The solar wind speed has increased from around 300 to 500 km/s over the past 12 hours. The total magnetic field strength has fluctuated between 2 nT and 10 nT. The Bz component fluctuated around 0 nT, ranging between -7 and +8 nT. Geomagnetic conditions ranged between Kp index 0-2 (NOAA) and local K index 0-2 (Dourbes) over the past 24 hours.

Geomagnetic conditions have increased a little (K=2) due to the arrival of a high speed stream from a small low latitude positive polarity Coronal Hole around 21:00 UT yesterday. Geomagnetic conditions are expected to be enhanced at least over the next 24 hours.

Today's estimated international sunspot number (ISN): 000, based on 08 stations.

Solar indices for 20 Nov 2019

Wolf number Catania	000
10cm solar flux	070
AK Chambon La Forêt	005
AK Wingst	002
Estimated Ap	002
Estimated international sunspot number	000 - Based on 22 stations

Noticeable events summary

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

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