Sunspot region AR8545
| Number of sunspots |
Size | Class Magn. | Class Spot | Location | |
|---|---|---|---|---|---|
| 1999/05/15 | 1 | 80 | HSX | N37E71 | |
| 1999/05/16 | 1 | 230 | HKX | N36E62 | |
| 1999/05/17 | 2 | 260 | HKX | N37E49 | |
| 1999/05/18 | 3 | 290 | HKX | N36E38 | |
| 1999/05/19 | 1 | 340 | HKX | N37E25 | |
| 1999/05/20 | 6 | 350 | CKO | N38E13 | |
| 1999/05/21 | 5 | 320 | CKO | N36E01 | |
| 1999/05/22 | 6 | 350 | CKO | N36W10 | |
| 1999/05/23 | 2 | 360 | HKX | N36W24 | |
| 1999/05/24 | 3 | 330 | CAO | N35W36 | |
| 1999/05/25 | 3 | 320 | CHO | N36W49 | |
| 1999/05/26 | 5 | 280 | CKO | N37W61 | |
| 1999/05/27 | 5 | 260 | DSO | N37W70 | |
| 1999/05/28 | 4 | 130 | CAO | N37W85 |
| C | M |
|---|---|
| 3 | 1 |
The top 4 solar flares from sunspot region 8545
| Start | Maximum | End | ||||
|---|---|---|---|---|---|---|
| 1 | M1.07 | 1999/05/27 | 16:49 | 16:59 | 17:08 | |
| 2 | C3.07 | 1999/05/18 | 07:14 | 07:18 | 07:24 | |
| 3 | C2 | 1999/05/28 | 14:12 | 14:16 | 14:21 | |
| 4 | C1.87 | 1999/05/23 | 08:04 | 08:07 | 08:09 |
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| Last X-flare | 2026/04/24 | X2.5 |
| Last M-flare | 2026/04/24 | M6.5 |
| Last geomagnetic storm | 2026/04/20 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2026 | 85.9 +7.7 |
| April 2026 | 80 -5.9 |
| Last 30 days | 90 +13.5 |
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