Viewing archive of Sunday, 21 April 2013 - Sunspot regions
Courtesy of SDO, SOHO (NASA) and the [AIA, EVE, and/or HMI] consortium.
| Sunspot number | New regions | Background flux | Maximum flux | C |
|---|---|---|---|---|
| 76 -25 | 0 | B7.29 | C6.49 | 16 |
Sunspot regions
Region 11722 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 | 30 | CRO | S20W0* | |
|
||||
Region 11723 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 3 -6 | 40 -20 | CSO | S20W57 | |
|
||||
Solar flares on this day | ||||
| C3.91 | ||||
Region 11727 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 7 -2 | 60 10 | DAO | N25E31 | |
|
||||
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| Spotless days | |
|---|---|
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