Välja antud: 2017 Sep 25 1312 UTC
Quiet conditions (<50% probability of C-class flares)
Active conditions expected (A>=20 or K=4)
Quiet
10cm flux | Ap | |
---|---|---|
25 Sep 2017 | 081 | 006 |
26 Sep 2017 | 083 | 008 |
27 Sep 2017 | 085 | 013 |
Over the past 24 hours solar activity has been low. No significant flares have been recorded. NOAA AR region 2681 (Catania group 55) has been most active, producing two B-class flares. No Earth directed Coronal Mass Ejections (CMEs) have been detected in coronograph observations. The greater than 10MeV proton flux remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with a small probability of C-class flares.
The solar wind parameters remained at nominal levels over the past 24 hours (except one short-term weak enhancement around midnight due to the influence of a small negative polarity CH HSS). The solar wind speed is presently about 390 km/s and still decreasing. The total magnetic field strength has been slowly decreasing from around 10 nT to 2 nT. The Bz component fluctuated around 0 nT and was mainly positive, ranging between -3 and +2.5 nT (except two singular episodes of Bz = -6 and -9 nT yesterday evening). Geomagnetic conditions ranged between Kp index 1-3 (NOAA) and local K index 1-3 (Dourbes) over the past 24 hours. Geomagnetic conditions are expected to be from quiet to unsettled today and tomorrow. Active conditions till minor geomagnetic storms can be expected on September 27 due to the influence of a positive polarity CH HSS.
Today's estimated international sunspot number (ISN): 039, based on 22 stations.
Wolf number Catania | /// |
10cm solar flux | 087 |
AK Chambon La Forêt | 014 |
AK Wingst | 006 |
Estimated Ap | 006 |
Estimated international sunspot number | 022 - Based on 24 stations |
Day | Begin | Max | Lõpp | Loc | Strength | OP | 10cm | Catania/NOAA | Radio burst types | |
---|---|---|---|---|---|---|---|---|---|---|
Puuduvad |
Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive
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