| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1998/04/30 | 2 | 0 | AXX | N28E58 | |
| 1998/05/01 | 9 | 40 | CRO | N26E47 | |
| 1998/05/02 | 28 | 140 | DAI | N26E33 | |
| 1998/05/03 | 27 | 200 | EAI | N27E19 | |
| 1998/05/04 | 50 | 300 | ESC | N27E06 | |
| 1998/05/05 | 60 | 510 | EKI | N27W08 | |
| 1998/05/06 | 52 | 650 | FKC | N27W23 | |
| 1998/05/07 | 43 | 620 | FHC | N27W34 | |
| 1998/05/08 | 31 | 620 | FKC | N27W48 | |
| 1998/05/09 | 21 | 380 | FKI | N28W61 | |
| 1998/05/10 | 6 | 240 | CHO | N27W74 | |
| 1998/05/11 | 5 | 90 | CSO | N26W84 |
| B | C | M |
|---|---|---|
| 2 | 20 | 3 |
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M3.99 | 1998/05/07 | 11:05 | 11:16 | 11:27 | |
| 2 | M1.91 | 1998/05/03 | 21:12 | 21:29 | 21:49 | |
| 3 | M1.44 | 1998/05/01 | 12:54 | 13:00 | 13:04 | |
| 4 | C7.07 | 1998/05/08 | 11:54 | 13:06 | 13:34 | |
| 5 | C6.17 | 1998/05/09 | 10:59 | 11:06 | 11:12 | |
| 6 | C4.79 | 1998/05/07 | 14:46 | 14:49 | 14:57 | |
| 7 | C4.61 | 1998/05/07 | 01:06 | 01:10 | 01:12 | |
| 8 | C4.11 | 1998/05/06 | 17:08 | 17:13 | 17:17 | |
| 9 | C3.91 | 1998/05/09 | 10:30 | 10:37 | 10:44 | |
| 10 | C3.89 | 1998/05/04 | 17:09 | 17:18 | 17:25 |
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| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/10 | M1.9 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 157.7 +65.9 |
| Last 30 days | 108.9 +11.4 |