Viewing archive of Saturday, 17 July 2021 - Sunspot regions
Courtesy of SDO, SOHO (NASA) and the [MDI, AIA, EVE, and/or HMI] consortium.
| Sunspot number | New regions | Background flux | Maximum flux |
|---|---|---|---|
| 53 18 | 1 | A5.38 | B7.88 |
Sunspot regions
Region 12842 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 5 4 | 40 20 | CSO | N26W15 | |
|
||||
Solar flares on this day | ||||
| B7.8 B1.2 B1.1 B1.3 B1.2 | ||||
Region 12843 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 -2 | 10 -20 | AXX | S18W86 | |
|
||||
Solar flares on this day | ||||
| B2.0 B2.6 | ||||
Region 12844 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 10 -10 | AXX | S43E49 | |
|
||||
Region 12845 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 6 | 30 | BXI | S15W06 | |
|
||||
Solar flares on this day | ||||
| B1.3 B4.2 B4.5 B2.2 B1.7 B1.6 | ||||
All times in UTC
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Space weather facts
| Last X-flare | 2026/02/04 | X4.21 |
| Last M-flare | 2026/02/16 | M2.4 |
| Last geomagnetic storm | 2026/02/22 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 1 day |
| 2026 | 1 day (2%) |
| Current stretch | 2 days |
| Monthly mean Sunspot Number | |
|---|---|
| January 2026 | 112.6 -11.4 |
| February 2026 | 86.1 -26.5 |
| Last 30 days | 94.1 -27.9 |