| Begin | Max | End | Xray | Region | |
|---|---|---|---|---|---|
| Tuesday, July 27 | 02:00 | 02:13 | 02:34 | B1.9 | ⎯ |
| 19:15 | 19:23 | 19:29 | B5.2 | 2846 | |
| 21:44 | 21:50 | 21:57 | B5.2 | 2846 | |
| 22:08 | 22:26 | 22:40 | B9.7 | 2849 |
Solar activity
UTC
Tuesday, July 27th 2021, 23:15:00 UTC
Regions with Sunspots
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.
Solar Activity Forecast
Solar activity is expected to be very low with a slight chance for a C-class flare on day one (28 Jul) and expected to be very low on days two and three (29 Jul, 30 Jul).
| 24 hr | 48 hr | 72 hr | |
|---|---|---|---|
| Class M | 01 % | 01 % | 01 % |
| Class X | 01 % | 01 % | 01 % |
| Proton | 01 % | 01 % | 01 % |
PCAF: green
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 336 km/s at 27/2053Z. Total IMF reached 10 nT at 27/2047Z. The maximum southward component of Bz reached -2 nT at 27/1255Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 410 pfu.
Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to active levels on day one (28 Jul), quiet to unsettled levels on day two (29 Jul) and quiet levels on day three (30 Jul).
Geomagnetic Activity Probabilities 28 Jul-30 Jul
| 24 hr | 48 hr | 72 hr | |
|---|---|---|---|
| Active | 30 % | 25 % | 10 % |
| Minor Storm | 10 % | 05 % | 01 % |
| Major-severe storm | 01 % | 01 % | 01 % |
| 24 hr | 48 hr | 72 hr | |
|---|---|---|---|
| Active | 15 % | 15 % | 15 % |
| Minor Storm | 30 % | 30 % | 20 % |
| Major-severe storm | 40 % | 30 % | 20 % |
3-days of 5-minute solar x-ray flux values (GOES-15)
Manually reviewed and edited by the duty forecaster
Sources: NOAA's Space Weather Prediction Center (SWPC), Joint Science Operations Center (JSOC)