Просмотр архива за среда, 28 июня 2017
Daily bulletin on solar and geomagnetic activity from the SIDC
Существующий: 2017 Jun 28 1230 UTC
SIDC Forecast
Солнечные вспышки
Quiet conditions (<50% probability of C-class flares)
Geomagnetism
Quiet (A<20 and K<4)
Солнечные протоны
Quiet
| 10cm flux | Ap | |
|---|---|---|
| 28 Jun 2017 | 073 | 005 |
| 29 Jun 2017 | 072 | 008 |
| 30 Jun 2017 | 073 | 006 |
Bulletin
Solar activity was at very low levels during the period. NOAA 2664 is decaying and lost most sunspots of its northwestern portion. The region produced two low-level B-class flares. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10MeV proton flux was at nominal levels.
Quiet flaring conditions are expected, with a tiny chance on an isolated C-class flare.
Solar wind speed declined slowly from about 470 to 450 km/s over the period. Bz fluctuated mostly between -2 and +3 nT. The interplanetary magnetic field was mostly directed away from the Sun.
The geomagnetic field was at quiet levels, and is expected to remain so. The particle stream from a small equatorial coronal hole may briefly enhance geomagnetic conditions on 29 or 30 June, with a small chance on an active episode.
Today's estimated international sunspot number (ISN): 018, based on 15 stations.Solar indices for 27 Jun 2017
| Wolf number Catania | 020 |
| 10cm solar flux | 074 |
| AK Chambon La Forêt | 008 |
| AK Wingst | 006 |
| Estimated Ap | 005 |
| Estimated international sunspot number | 020 - Based on 26 stations |
Noticeable events summary
| Day | Begin | Max | Конец | Loc | Strength | OP | 10cm | Catania/NOAA | Radio burst types | |
|---|---|---|---|---|---|---|---|---|---|---|
| Нет | ||||||||||
Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive
Все время в UTC
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