Solar activity report
Below you'll find a daily report brought to you by the NOAA about the solar activity and auroral activity during the past day and the prediction for the coming days. This page is daily updated around midnight.
Report of Solar-Geophysical Activity 2018 May 27 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 147 Issued at 2200Z on 27 May 2018IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z
Solar activity has been at very low levels for the past 24
hours. There are currently 2 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
with a slight chance for a C-class flare on days one, two, and three (28
May, 29 May, 30 May).
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 376 km/s at 27/2003Z. Total IMF reached 6 nT at
27/1808Z. The maximum southward component of Bz reached -3 nT at
27/1000Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 320 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and two (28 May, 29 May)
and quiet levels on day three (30 May).
III. Event Probabilities 28 May to 30 May
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 27 May 075 Predicted 28 May-30 May 073/072/072 90 Day Mean 27 May 070
V. Geomagnetic A Indices
Observed Afr/Ap 26 May 005/003 Estimated Afr/Ap 27 May 005/005 Predicted Afr/Ap 28 May-30 May 008/008-008/008-005/005
VI. Geomagnetic Activity Probabilities 28 May to 30 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 05% |
| Minor storm | 05% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 25% | 15% |
| Major-severe storm | 25% | 25% | 05% |
Current data suggest that it is not possible to see aurora now at middle latitudes
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Space weather facts
| Last X-flare: | 2017/09/10 | X8.2 |
| Last M-flare: | 2017/10/20 | M1.0 |
| Last geomagnetic storm: | 2018/05/06 | Kp6 (G2) |
| Number of spotless days in 2018: | 78 | |
| Last spotless day: | 2018/05/20 | |