Datum verslag: 2021 Aug 21 1231 UTC
C-class flares expected, (probability >=50%)
Quiet (A<20 and K<4)
Quiet
10cm flux | Ap | |
---|---|---|
21 Aug 2021 | 077 | 007 |
22 Aug 2021 | 079 | 007 |
23 Aug 2021 | 081 | 007 |
One numbered active region is visible on the solar disk: NOAA 2858 (beta magnetic field configuration). There is a region that rotated over the east limb (unnumbered still) that produced 3 C-class flares in the past 24 hours, the strongest being a C3.0 flare peaking at 15:57 UT on 20 August. There is another region rotating into view in the southern hemisphere. More C-class flares can be expected, M-class flares are possible.
The AR rotating into view from the southern hemisphere produced a wide eastward CME first seen by LASCO C2 at 06:12 UT on 20 August. given the position of the source region behind the limb, this CME is not expected to affect the Earth. No Earth directed Coronal Mass Ejections (CMEs) were observed in the available coronagraphic imagery.
The southern extension of the north polar coronal hole has crossed central meridian today, a related high speed stream may arrive to the Earth in about 3 days.
The greater than 10 MeV proton flux was at background levels in the past 24 hours, and is expected to remain so in the next 24 hours. The greater than 2 MeV electron flux remained below the 1000 pfu alert threshold, while the 24h electron fluence was at normal levels over the past 24 hours. Over the next 24 hours they are expected to remain at those levels.
Over the past 24 hours the solar wind speed has been around 350 km/s. The total magnetic field strength varied between 2 and 8 nT, with positive polarity (directed away from the Sun). Similar slow solar wind conditions are expected for the next 24 hours.
Geomagnetic conditions were at quiet to unsettled levels (NOAA Kp 0-2 and K Dourbes 0-3) over the past 24 hours. Similar conditions are expected over the next 24 hours.
Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 015, gebaseerd op 16 stations.
Wolfgetal Catania | 015 |
10cm zonneflux | 078 |
AK Chambon La Forêt | 007 |
AK Wingst | 006 |
Geschatte Ap | 006 |
Geschat internationaal zonnevlekkengetal | 013 - Gebaseerd op 27 stations |
Dag | Start | Max | Einde | Locatie | Sterkte | OP | 10cm | Catania/NOAA | Soorten radio-uitbarstingen | |
---|---|---|---|---|---|---|---|---|---|---|
Geen |
Aangeboden door het Solar Influences Data Analysis Center© - SIDC - Verwerkt door SpaceWeatherLive
Alle tijden in UTC
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G1 - Kleine geomagnetische storm (Kp5) Drempel bereikt: 01:50 UTC
G1 - Kleine geomagnetische storm (Kp5) Drempel bereikt: 20:20 UTC
Matige M1.05 zonnevlam
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Het OVATION-model voorspelt dat het hemisferisch vermogen 78GW zal bereiken om 10:32 UTC
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Laatste M-klasse uitbarsting | 05/04/2025 | M1.0 |
Laatste geomagnetische storm | 05/04/2025 | Kp6- (G2) |
Zonnevlekkenloze dagen | |
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Laatste zonnevlekkenloze dag | 08/06/2022 |
Maandelijks gemiddeld zonnevlekkengetal | |
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maart 2025 | 134.2 -20.4 |
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