Viewing archive of Friday, 31 May 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 | M |
|---|---|---|---|---|---|
| 58 -13 | 0 | B3.29 | M1.51 | 2 | 1 |
Sunspot regions
Region 11755 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 -9 | 10 -60 | AXX | N12W59 | |
|
||||
Region 11756 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 -10 | 70 -70 | HSX | S18W73 | |
|
||||
Region 11757 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 30 -50 | HSX | S08W00 | |
|
||||
Solar flares on this day | ||||
| B6.1 | ||||
Region 11758 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 1 | 10 -10 | AXX | S22E21 | |
|
||||
Region 11760 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 | 10 | BXO | N12E51 | |
|
||||
Solar flares on this day | ||||
| M1.51 | ||||
Region 11761 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 10 | HSX | S18E37 | |
|
||||
Solar flares on this day | ||||
| C1.55 | ||||
All times in UTC
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Space weather facts
| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/04/09 | M1.0 |
| Last geomagnetic storm | 2026/04/03 | Kp7- (G3) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2026 | 85.9 +7.7 |
| April 2026 | 89.7 +3.8 |
| Last 30 days | 93.4 +33.3 |
