Viewing archive of Thursday, 21 February 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 |
|---|---|---|---|---|
| 75 -31 | 0 | B3.86 | C3.68 | 4 |
Sunspot regions
Region 11671 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 -1 | 90 -20 | HSX | N16W59 | |
Region 11673 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 16 -8 | 80 -10 | CAO | S11E04 | |
Region 11675 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 -2 | 50 -10 | HSX | N12W23 | |
Region 11676 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 1 | 50 | CSO | S19E26 | |
Region 11677 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 10 | AXX | S28E26 | |
Region 11678 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 13 -1 | 360 230 | DKC | N11W54 | |
Solar flares on this day | ||||
| C2.8 C2.91 C3.67 C1.41 | ||||
Region 11679 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 10 | AXX | S14E30 | |
All times in UTC
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| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
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|---|---|
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| Last 30 days | 99.9 +42.1 |
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