Vydáno: 2017 Sep 26 1322 UTC
Quiet conditions (<50% probability of C-class flares)
Active conditions expected (A>=20 or K=4)
Quiet
10cm flux | Ap | |
---|---|---|
26 Sep 2017 | 092 | 004 |
27 Sep 2017 | 094 | 016 |
28 Sep 2017 | 096 | 010 |
Solar activity slightly increased over the past 24 hours. Two numbered active regions (AR) regions on the visible disk AR 2681 (Cso; Beta), AR 2682 (Hax; Alpha), produced multiple B-class flares. The newly- numbered AR 2683 (Hkx; Apha) produced the largest C1.8 flare which peaked at 02:34 UT today (26-Sep-2017). One eruptive dimming has been observed at the solar disk center at 15:23 UT yesterday, an associated CME departed mostly toward the East with the projected speed around 490 km/s. More coronograph imagery is needed before conclusion can be made. One filament erupted from the east solar limb at 22:20 UT yesterday; the associated slow CME is not expected to be geoeffective. Solar activity is expected to remain low over the next 24 hours with a probability of C-class flares. Solar wind parameters returned to nominal levels during the past 24 hours. Solar wind speed decreased from around 400 km/s to 315 km/s. Total field strength remained below 3.5 nT, while Bz component varied between 2.5 and -2.5 nT. Solar wind parameters are expected remain at near background levels today (26-Sep-2017). Solar wind variations can increase tomorrow (27 September, 2017) due to the influence of the transequatorial positive polarity CH HSS. Geomagnetic conditions ranged between Kp index 0-2 (NOAA) and local K index 0-2 (Dourbes) over the past 24 hours. The geomagnetic field is expected to be at quiet levels today and may reach a minor storm level tomorrow (27-Sep-2017).
Today's estimated international sunspot number (ISN): 040, based on 18 stations.
Wolf number Catania | 039 |
10cm solar flux | 090 |
AK Chambon La Forêt | 006 |
AK Wingst | 005 |
Estimated Ap | 004 |
Estimated international sunspot number | 039 - Based on 29 stations |
Day | Begin | Max | Konec | Loc | Strength | OP | 10cm | Catania/NOAA | Radio burst types | |
---|---|---|---|---|---|---|---|---|---|---|
Žádný |
Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive
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