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Daily bulletin on solar and geomagnetic activity from the SIDC

Существующий: 2019 Jul 22 1243 UTC

SIDC Forecast

Солнечные вспышки

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Солнечные протоны

Quiet

	10cm flux	Ap
22 Jul 2019	068	010
23 Jul 2019	068	011
24 Jul 2019	068	010

Bulletin

The solar activity has been quiet over the past 24 hours. A relatively small bipolar sunspot emerged on the solar disc (Catania sunspot group 21), but does not show any strong activity so far. 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 varied between 315 km/s and 420 km/s (ACE). The magnetic field showed some enhancement with Bz that varied between -8 nT and +9 nT and the total interplanetary magnetic field between 2 nT and 10 nT. The solar wind parameters might remain slightly enhanced 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 short period of active conditions, with the Kp index (NOAA) ranging between 1-3 and the local K index (Dourbes) ranging between 1-4 over the past 24 hours.

Today's estimated international sunspot number (ISN): 013, based on 20 stations.

Solar indices for 21 Jul 2019

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	017
AK Wingst	010
Estimated Ap	010
Estimated international sunspot number	000 - Based on 29 stations

Noticeable events summary

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

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