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Daily bulletin on solar and geomagnetic activity from the SIDC

Существующий: 2019 Jul 23 1230 UTC

SIDC Forecast

Солнечные вспышки

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

Geomagnetism

Quiet (A<20 and K<4)

Солнечные протоны

Quiet

	10cm flux	Ap
23 Jul 2019	068	007
24 Jul 2019	068	008
25 Jul 2019	068	008

Bulletin

The solar activity has been quiet over the past 24 hours. The small bipolar sunspot on the solar disc (NOAA Active region 2745, Catania sunspot group 21) has decayed and disappeared. The sun is currently spotless and the X-ray flux remained below B-level. Solar activity is expected to remain at low levels for the next 24 hours.

No Earth directed coronal mass ejections (CME) were observed over the last 24 hours in the available coronagraph imagery. The greater than 10 MeV proton flux remained at background levels over the past 24 hours and is expected to remain at low levels.

The solar wind speed was stable with values around 400 km/s (ACE). The total interplanetary magnetic field remained below 7 nT , the Bz component varied between -4 nT and +5 nT. The solar wind parameters might show some small enhancement for the coming days due to the possible effect of the South pole coronal hole wind streams.

Quiet to unsettle geomagnetic conditions were observed with the Kp index (NOAA) ranging between 1-2 and the local K index (Dourbes) ranging between 1-3 over the past 24 hours.

Today's estimated international sunspot number (ISN): 000, based on 22 stations.

Solar indices for 22 Jul 2019

Wolf number Catania	014
10cm solar flux	067
AK Chambon La Forêt	016
AK Wingst	010
Estimated Ap	010
Estimated international sunspot number	013 - Based on 25 stations

Noticeable events summary

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

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