Viewing archive of Friday, 21 April 2000 - 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 |
|---|---|---|---|---|
| 211 32 | 2 | C1.24 | C6.97 | 13 |
Sunspot regions
Region 8955 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 10 -1 | 170 -90 | EAO | S21W46 | |
Solar flares on this day | ||||
| C2.37 C2.57 | ||||
Region 8958 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 8 4 | 60 40 | DSO | N19W53 | |
Region 8959 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 -1 | 10 | AXX | S16W78 | |
Region 8962 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 30 | HSX | N23W15 | |
Region 8963 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 11 -11 | 60 -20 | CAO | N16W18 | |
Solar flares on this day | ||||
| C3.39 C2.51 C1.71 C2.03 C2.69 C1.73 C2.91 | ||||
Region 8964 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 | 10 -10 | HRX | N34W31 | |
Region 8965 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 3 -3 | 10 | BXO | S17E26 | |
Region 8966 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 1 | 40 -30 | HSX | S13E38 | |
Region 8967 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 6 3 | 200 50 | EAO | N21E49 | |
Solar flares on this day | ||||
| C2.81 | ||||
Region 8968 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 11 7 | 90 70 | DAO | S13E14 | |
Region 8969 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 80 | HRX | N13E62 | |
Region 8970 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 | 350 | HKX | S14E77 | |
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| Last M-flare | 2026/04/03 | M1.3 |
| Last geomagnetic storm | 2026/04/02 | Kp6- (G2) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
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| April 2026 | 141 +55.1 |
| Last 30 days | 94.6 +27 |
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