Viewing archive of Thursday, 19 March 2026
Solar activity report
Report of Solar-Geophysical Activity 2026 Mar 19 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 78 Issued at 2200Z on 19 Mar 2026IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z Solar activity has been at low levels for the past 24 hours.
There are currently 2 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be low with a
slight chance for an M-class flare on days one, two, and three (20 Mar,
21 Mar, 22 Mar).
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 428 km/s at 18/2352Z. Total IMF reached 6 nT at
19/0905Z. The maximum southward component of Bz reached -2 nT at
19/1408Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 4941 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to major storm levels on day one (20 Mar), active to
major storm levels on day two (21 Mar) and unsettled to minor storm
levels on day three (22 Mar).
III. Event Probabilities 20 Mar to 22 Mar
| Class M | 15% | 15% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 19 Mar 106 Predicted 20 Mar-22 Mar 105/105/100 90 Day Mean 19 Mar 142
V. Geomagnetic A Indices
Observed Afr/Ap 18 Mar 004/005 Estimated Afr/Ap 19 Mar 009/013 Predicted Afr/Ap 20 Mar-22 Mar 027/044-035/050-020/030
VI. Geomagnetic Activity Probabilities 20 Mar to 22 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 45% |
| Minor storm | 35% | 35% | 30% |
| Major-severe storm | 30% | 35% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 15% | 15% | 20% |
| Major-severe storm | 75% | 79% | 70% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/02/04 | X4.21 |
| Last M-flare | 2026/03/26 | M4.0 |
| Last geomagnetic storm | 2026/03/25 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (4%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2026 | 78.2 -34.3 |
| March 2026 | 80.2 +2 |
| Last 30 days | 77.8 -4.5 |