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Daily bulletin on solar and geomagnetic activity from the SIDC
Существующий: 2017 Jul 27 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 | |
|---|---|---|
| 27 Jul 2017 | 069 | 006 |
| 28 Jul 2017 | 069 | 003 |
| 29 Jul 2017 | 070 | 003 |
Bulletin
Solar activity was at very low levels, and is expected to remain so. The solar disk was spotless. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux remained slightly above background levels.
Earth is exiting the high speed stream (HSS) from a positive polarity coronal hole (CH). Wind speed gradually decreased from 590 km/s to its current values near 450 km/s (DSCOVR). Bz oscillated between -4 and +3 nT until about 19UT, when it started a much smoother variation between -3 and +2 nT. The interplanetary magnetic field was mostly directed away from the Sun.
The geomagnetic field was at quiet levels. Mostly quiet geomagnetic conditions are expected, with a chance on an unsettled episode.
Today's estimated international sunspot number (ISN): 000, based on 16 stations.Solar indices for 26 Jul 2017
| Wolf number Catania | 013 |
| 10cm solar flux | 069 |
| AK Chambon La Forêt | 012 |
| AK Wingst | 013 |
| Estimated Ap | 013 |
| Estimated international sunspot number | 000 - Based on 24 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
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