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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2022 Apr 25 1232 UTC

SIDC Forecast

Sluneční erupce

C-class flares expected, (probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Sluneční protony

Quiet

	10cm flux	Ap
25 Apr 2022	159	005
26 Apr 2022	159	007
27 Apr 2022	159	007

Bulletin

Solar flaring activity was more active in the past 24 hours with several M-class flares.

The magnetically complex bipolar region (beta-gamma-delta) Catania sunspot group 81 (NOAA active region 2993) produced two M-class fares: a M1.0-class flare peaking at 01:56 UTC and a M1.2-class flare peaking at 04:02 UTC. It was then followed by few C-class flares. The unipolar region Catania sunspot group 84 (NOAA active region 2995) also produced M1.2-class flare peaking at 02:01 UTC on April 25. The other regions on the disc are comparatively insignificant. Flares at M levels are likely with still also a chance for an X flare.

No Earth directed Coronal Mass Ejection (CME) has been detected in the available coronagraph imagery over the last 24 hours.

The greater than 2 MeV electron flux remained below the 1000 pfu alert threshold and is expected to remain below the threshold in the next 24 hours. The greater than 2 MeV electron fluence was at nominal levels in the past 24 hours and is expected remained at nominal levels in the next 24 hours.

Solar wind continued to be slightly enhanced. Solar wind velocity was ranging from 400 km/s to 500 km/s. The magnetic field magnitude remained below 6 nT with a magnetic field orientation indicating connection to a positive polarity sector. Solar wind speed is expected to remain just slowly enhanced over the next days.

The geomagnetic conditions were quiet (NOAA Kp and local K-Belgium 0-2). The geomagnetic conditions are expected to be quiet with possible isolated periods of unsettled contrition.

Today's estimated international sunspot number (ISN): 110, based on 13 stations.

Solar indices for 24 Apr 2022

Wolf number Catania	///
10cm solar flux	159
AK Chambon La Forêt	006
AK Wingst	005
Estimated Ap	004
Estimated international sunspot number	119 - Based on 27 stations

Noticeable events summary

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

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