Viewing archive of Sunday, 20 January 2019
Solar activity report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2019 Jan 20 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 20 Issued at 2200Z on 20 Jan 2019IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z
Solar activity has been at very low levels for the past 24
hours. There are currently 0 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
on days one, two, and three (21 Jan, 22 Jan, 23 Jan).
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 385 km/s at 20/1832Z. Total IMF reached 5
nT at 20/2044Z. The maximum southward component of Bz reached -4 nT at
20/1951Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one and two (21 Jan, 22 Jan) and quiet to
active levels on day three (23 Jan).
III. Event Probabilities 21 Jan to 23 Jan
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 20 Jan 069 Predicted 21 Jan-23 Jan 071/071/071 90 Day Mean 20 Jan 070
V. Geomagnetic A Indices
Observed Afr/Ap 19 Jan 002/004 Estimated Afr/Ap 20 Jan 004/004 Predicted Afr/Ap 21 Jan-23 Jan 006/005-006/005-013/018
VI. Geomagnetic Activity Probabilities 21 Jan to 23 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 35% |
| Minor storm | 01% | 01% | 20% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 20% | 20% | 25% |
| Major-severe storm | 10% | 10% | 60% |
All times in UTC
Latest news
Friday, 28 March 2025
X1.1 solar flare
Monday, 24 March 2025
Coronal hole faces Earth
Saturday, 22 March 2025
Strong G3 geomagnetic storm watch for 23 March
Latest forum messages
AR 4055 992025/04/12-13 Filament CMEs 2025/04/16 G2 Watch 38Incoming & Unnumbered Active Regions 1700Unspecified geomagnetic activity 2258Potential AR4062 8
More topicsSupport SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!
Space weather facts
| Last X-flare | 2025/03/28 | X1.1 |
| Last M-flare | 2025/04/14 | M4.2 |
| Last geomagnetic storm | 2025/04/06 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2025 | 134.2 -20.4 |
| April 2025 | 132.1 -2.1 |
| Last 30 days | 130.6 -13.6 |