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Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2026 May 06 1231 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Quiet (A<20 and K<4)

Proton Flux monitor

Quiet

	10cm flux	Ap
06 May 2026	125	004
07 May 2026	120	010
08 May 2026	116	019

Zonnevlekkengebieden en zonnevlammen

The solar flaring activity was at low levels over the past 24 hours. A total of 8 numbered sunspot groups were identified on the visible solar disk. All regions are relatively simply, classified either as magnetic type alpha or beta. All regions have either exhibited a decay or remained stable. SIDC Sunspot Group 860 (NOAA Active Region 4432) currently located at N12E09 has exhibited some decay and decreased the complexity of its underlying magnetic field configuration, being classified as magnetic type beta. The largest activity was a C1.8 flare (SIDC Flare 7616) peaking on May 05 at 14:12 UTC, produced by SIDC Sunspot Group 805 (NOAA Active Regions 4384, 4408, 4413, 4425). This region is now rotating behind the west limb. SIDC Sunspot Group 859 (NOAA Active Region 4429, magnetic type beta) currently located at S04W38 and SIDC Sunspot Group 856 (NOAA Active Region 4431, magnetic type beta) currently located at S16W06 have also contributed to the observed low levels of activity. The solar flaring activity is expected to be at low levels over the next 24 hours with C-class flares expected and small chances for isolated M-class flaring.

Coronale massa uitstoten

No Earth-directed coronal mass ejections (CMEs) have been identified in the available coronagraph imagery over the past 24 hours.

Zonnewind

Over the past 24 hours the solar wind parameters (as measured by ACE at L1) have registered waning influence of the ICME arrival and a gradual return towards background slow solar wind. The magnitude of the interplanetary magnetic field (B) was elevated at the beginning of the forecasting period, registering a maximum value of 11.4 nT. It has followed a declining trend with current values around 5 nT. The north-south (Bz) component was almost entirely positive (northward), recording a minimum value of -0.3 nT. The solar wind speed was slow with values below 442 km/s. The B field phi angle was in the negative sector (directed towards the Sun) on May 05 and has switched to the positive sector (directed away from the Sun) on May 06. The solar wind parameters are expected to register pristine slow solar wind regime until late UTC on May 07 or May 08, when a high- speed stream related to the positive-polarity equatorial coronal hole (SIDC CH 158 crossing the central meridian on May 04) is expected to reach the Earth.

Geomagnetisme

The geomagnetic conditions over the past 24 hours were quiet. Predominantly quiet geomagnetic conditions are expected for the next 24 hours with possible isolated unsettled periods. Quiet to active conditions with chances for isolated minor storms are expected in the late UTC hours of May 07 and May 08.

Proton flux niveaus

Over the past 24 hours the greater than 10 MeV GOES proton flux was at nominal levels and is expected to remain so over the 24 hours over the next 24 hours.

Elektronenfluxen in geostationaire baan

The greater than 2 MeV electron flux as measured by GOES 18 and GOES 19 was close to, but below the 1000 pfu threshold over the past 24 hours and is expected to remain so over the next days. The 24-hour electron fluence was at nominal levels and is expected to remain so over the 24 hours.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 107, gebaseerd op 11 stations.

Zon indexen voor 05 May 2026

Wolfgetal Catania	165
10cm zonneflux	128
AK Chambon La Forêt	006
AK Wingst	013
Geschatte Ap	011
Geschat internationaal zonnevlekkengetal	135 - Gebaseerd op 16 stations

Overzicht opvallende gebeurtenissen

Aangeboden door het Solar Influences Data Analysis Center© - SIDC - Verwerkt door SpaceWeatherLive

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