| Número de manchas solares |
Tamaño | Clase Magn. | Clase Mancha | Ubicación | |
|---|---|---|---|---|---|
| 14/12/1999 | 4 | 20 | BXO | S14E74 | |
| 15/12/1999 | 5 | 100 | DAO | S13E60 | |
| 16/12/1999 | 14 | 280 | DKC | S14E48 | |
| 17/12/1999 | 26 | 410 | DKC | S14E34 | |
| 18/12/1999 | 48 | 550 | DKC | S13E21 | |
| 19/12/1999 | 55 | 490 | EKI | S13E07 | |
| 20/12/1999 | 41 | 500 | EKI | S13W06 | |
| 21/12/1999 | 43 | 460 | EAI | S14W21 | |
| 22/12/1999 | 31 | 450 | EKC | S13W33 | |
| 23/12/1999 | 30 | 350 | EKI | S13W47 | |
| 24/12/1999 | 13 | 370 | DKO | S14W59 | |
| 25/12/1999 | 12 | 280 | DAO | S13W73 | |
| 26/12/1999 | 6 | 240 | DAO | S13W86 |
| C |
|---|
| 16 |
| Inicio | Máximo | Fin | ||||
|---|---|---|---|---|---|---|
| 1 | C9.81 | 17/12/1999 | 05:33 | 05:39 | 05:42 | |
| 2 | C9.74 | 17/12/1999 | 18:55 | 19:00 | 19:07 | |
| 3 | C7.1 | 17/12/1999 | 09:30 | 09:35 | 09:38 | |
| 4 | C6.97 | 20/12/1999 | 01:02 | 01:08 | 01:10 | |
| 5 | C6.34 | 24/12/1999 | 18:27 | 18:34 | 18:42 | |
| 6 | C4.93 | 17/12/1999 | 02:36 | 02:41 | 02:44 | |
| 7 | C4.43 | 18/12/1999 | 17:21 | 17:25 | 17:32 | |
| 8 | C3.6 | 15/12/1999 | 14:12 | 14:17 | 14:19 | |
| 9 | C3.59 | 16/12/1999 | 03:09 | 03:14 | 03:18 | |
| 10 | C3.49 | 16/12/1999 | 07:20 | 07:24 | 07:29 |
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| Último evento clase X | 08/12/2025 | X1.1 |
| Último evento clase M | 29/12/2025 | M1.0 |
| Últimas tormentas geomagnéticas | 22/12/2025 | Kp5 (G1) |
| Días sin manchas | |
|---|---|
| Último día sin manchas | 08/06/2022 |
| Promedio de manchas solares mensuales | |
|---|---|
| noviembre 2025 | 91.8 -22.8 |
| diciembre 2025 | 117.2 +25.4 |
| Last 30 days | 117.2 +28.6 |