Viewing archive of Saturday, 23 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 |
|---|---|---|---|---|
| 117 -24 | 0 -1 | C1.71 | C8.13 | 13 |
Sunspot regions
Region 8437 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 50 -10 | HSX | N11W89 | |
Region 8439 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 20 -3 | 480 70 | EKC | S23W57 | |
Solar flares on this day | ||||
| C4.24 C1.93 C2.13 C1.67 C8.03 C8.13 C4.87 C5.23 | ||||
Region 8440 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 21 -4 | 360 30 | FHI | N19W50 | |
Region 8442 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 3 -1 | 40 | CRO | N25W80 | |
Region 8443 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 1 | 0 -10 | AXX | S17E20 | |
Region 8444 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 8 1 | 60 40 | DAO | N19W14 | |
Region 8446 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 -1 | 0 -10 | BXO | N15E46 | |
Region 8447 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 | 30 | CRO | N19W20 | |
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| Spotless days | |
|---|---|
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| Monthly mean Sunspot Number | |
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