Viewing archive of Saturday, 13 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 |
|---|---|---|---|---|
| 148 20 | 2 2 | B5.29 | C2.75 | 5 |
Sunspot regions
Region 11711 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 100 | HAX | S16W0* | |
|
||||
Region 11714 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 40 -30 | HSX | N14W79 | |
|
||||
Region 11718 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 25 2 | 350 -160 | DKC | N21W58 | |
|
||||
Solar flares on this day | ||||
| C2.71 C1.98 | ||||
Region 11719 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 26 4 | 140 -150 | DSI | N10W28 | |
|
||||
Solar flares on this day | ||||
| C2.16 | ||||
Region 11721 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 18 1 | 190 -30 | DSI | S18W07 | |
|
||||
Region 11722 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 | 20 -10 | CRO | S21E03 | |
|
||||
Region 11723 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 | 10 | BXO | S18E49 | |
Region 11724 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 | 40 | HAX | S27E70 | |
Solar flares on this day | ||||
| C2.25 C1.32 | ||||
All times in UTC
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| Last X-flare | 2026/03/30 | X1.5 |
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| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
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|---|---|
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| Last 30 days | 102.4 +48.5 |
