Viewing archive of Thursday, 17 August 2023 - Sunspot regions
Courtesy of SDO, SOHO (NASA) and the [MDI, AIA, EVE, and/or HMI] consortium.
| Sunspot number | New regions | Background flux | Maximum flux | C |
|---|---|---|---|---|
| 135 -5 | 1 -2 | B8.07 | C5.2 | 10 |
Sunspot regions
Region 13397 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 | 20 -70 | CAO | N17W83 | |
|
||||
Solar flares on this day | ||||
| C5.1 C2.2 | ||||
Region 13403 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 16 4 | 180 -80 | DAI | N25W22 | |
|
||||
Solar flares on this day | ||||
| C1.3 | ||||
Region 13404 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 3 1 | 30 -20 | CAO | S09E20 | |
|
||||
Region 13405 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 -1 | 160 -20 | ESO | N08E35 | |
|
||||
Solar flares on this day | ||||
| C1.2 | ||||
Region 13406 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 -2 | 20 10 | BXO | S18W45 | |
|
||||
Region 13407 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 8 1 | 200 10 | DSI | S18W04 | |
|
||||
Region 13408 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 3 -2 | 10 | BXO | S18W05 | |
|
||||
Region 13409 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 7 -2 | 20 -10 | CRO | N20W30 | |
|
||||
Solar flares on this day | ||||
| C1.7 | ||||
Region 13410 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 -3 | 10 | AXX | S30W48 | |
|
||||
Region 13411 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 70 | HSX | N12E52 | |
|
||||
All times in UTC
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| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/03/28 | M1.3 |
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| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
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| Monthly mean Sunspot Number | |
|---|---|
| February 2026 | 78.2 -34.3 |
| Last 30 days | 90.3 +19 |
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