Viewing archive of Friday, 28 April 2023 - Sunspot regions
Courtesy of SDO, SOHO (NASA) and the [MDI, AIA, EVE, and/or HMI] consortium.
| Sunspot number | New regions | Background flux | Maximum flux | C |
|---|---|---|---|---|
| 111 -25 | 0 -1 | B6.94 | C7.18 | 12 |
Sunspot regions
Region 13285 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 5 | 220 -20 | CAO | S19W24 | |
|
||||
Solar flares on this day | ||||
| C6.7 C2.8 C4.2 | ||||
Region 13286 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 1 | 10 | BXO | S11W16 | |
|
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Region 13288 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 23 -6 | 390 10 | EHI | S23W21 | |
|
||||
Solar flares on this day | ||||
| C4.9 C2.8 C1.5 C2.6 C2.9 C4.2 C3.1 C2.6 C6.1 | ||||
Region 13289 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 10 5 | 180 | DSI | N20E37 | |
|
||||
Solar flares on this day | ||||
| C6.8 | ||||
Region 13290 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 3 | 10 | BXO | N24W73 | |
|
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Region 13291 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 8 -12 | 30 | CRO | N09W16 | |
|
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Region 13292 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 20 10 | HRX | N14E48 | |
|
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All times in UTC
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Space weather facts
| Last X-flare | 2026/02/04 | X4.3 |
| Last M-flare | 2026/02/05 | M1.1 |
| Last geomagnetic storm | 2026/02/05 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| December 2025 | 124 +32.2 |
| February 2026 | 141.3 +17.3 |
| Last 30 days | 123.9 +16.5 |