Viewing archive of Tuesday, 6 April 2021
Solar activity report
Report of Solar-Geophysical Activity 2021 Apr 06 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 96 Issued at 2200Z on 06 Apr 2021IA. Analysis of Solar Active Regions and Activity from 05-2100Z to 06-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 1 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
on days one, two, and three (07 Apr, 08 Apr, 09 Apr).
IIA. Geophysical Activity Summary 05-2100Z to 06-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 345 km/s at 05/2211Z. Total IMF reached 9 nT at
06/0152Z. The maximum southward component of Bz reached -4 nT at
06/1839Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 212 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and two (07 Apr, 08 Apr)
and quiet levels on day three (09 Apr).
III. Event Probabilities 07 Apr to 09 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 06 Apr 074 Predicted 07 Apr-09 Apr 074/072/072 90 Day Mean 06 Apr 076
V. Geomagnetic A Indices
Observed Afr/Ap 05 Apr 005/004 Estimated Afr/Ap 06 Apr 003/005 Predicted Afr/Ap 07 Apr-09 Apr 008/008-007/008-006/005
VI. Geomagnetic Activity Probabilities 07 Apr to 09 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 20% | 10% |
| Minor storm | 05% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 30% | 25% | 20% |
| Major-severe storm | 25% | 20% | 10% |
All times in UTC
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Space weather facts
| Last X-flare | 2024/12/08 | X2.2 |
| Last M-flare | 2024/12/23 | M8.9 |
| Last geomagnetic storm | 2024/12/17 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
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| Last 30 days | 114.4 -44.3 |