Viewing archive of Wednesday, 20 January 1999 - Sunspot regions
It appears that the image of the visible solar disk for this day in history is missing.
| Sunspot number | New regions | Background flux | Maximum flux | C | M |
|---|---|---|---|---|---|
| 156 -26 | 0 -2 | C1.43 | M7.54 | 5 | 1 |
Sunspot regions
Region 8437 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 70 -20 | HSX | N11W50 | |
Region 8439 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 44 -2 | 300 60 | FAI | S23W13 | |
Solar flares on this day | ||||
| C2.89 | ||||
Region 8440 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 49 -5 | 300 -10 | EAI | N19W10 | |
Solar flares on this day | ||||
| C3.06 | ||||
Region 8442 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 11 -4 | 70 -10 | DAO | N24W41 | |
Region 8443 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 3 | 10 | BXO | S17E55 | |
Region 8444 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 | 0 | AXX | N19E20 | |
Region 8445 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 | 0 | BXO | N10E25 | |
All times in UTC
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Space weather facts
| Last X-flare | 2026/03/30 | X1.4 |
| Last M-flare | 2026/03/28 | M1.3 |
| Last geomagnetic storm | 2026/03/25 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2026 | 78.2 -34.3 |
| March 2026 | 86.6 +8.4 |
| Last 30 days | 86.6 +11.2 |
This day in history*
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