Sunspot region AR8673
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1999/08/20 | 1 | 100 | HSX | S17E81 | |
| 1999/08/21 | 2 | 280 | HHX | S19E66 | |
| 1999/08/22 | 16 | 400 | FHO | S19E55 | |
| 1999/08/23 | 13 | 490 | DKO | S20E43 | |
| 1999/08/24 | 28 | 540 | FKI | S19E32 | |
| 1999/08/25 | 14 | 430 | CKO | S20E18 | |
| 1999/08/26 | 18 | 410 | FKO | S21E08 | |
| 1999/08/27 | 13 | 410 | FKO | S19W08 | |
| 1999/08/28 | 14 | 440 | CHO | S19W24 | |
| 1999/08/29 | 3 | 370 | CHO | S23W38 | |
| 1999/08/30 | 2 | 290 | HHX | S19W51 | |
| 1999/08/31 | 2 | 270 | HHX | S19W64 | |
| 1999/09/01 | 2 | 170 | HAX | S20W76 | |
| 1999/09/02 | 1 | 210 | HRX | S19W94 |
| C | M |
|---|---|
| 2 | 1 |
The top 3 solar flares from sunspot region 8673
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M1.02 | 1999/08/27 | 04:51 | 05:36 | 05:51 | |
| 2 | C4.77 | 1999/08/25 | 21:19 | 21:43 | 21:55 | |
| 3 | C3.1 | 1999/08/30 | 10:19 | 10:22 | 10:31 |
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| Spotless days | |
|---|---|
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| Monthly mean Sunspot Number | |
|---|---|
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| December 2025 | 116.5 +24.7 |
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