Viewing archive of Thursday, 20 August 1998 - Sunspot regions
It appears that the image of the visible solar disk for this day in history is missing.
| Sunspot number | New regions | Background flux | Maximum flux | C |
|---|---|---|---|---|
| 120 -12 | 2 1 | C2.29 | C8.27 | 5 |
Sunspot regions
Region 8297 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 -1 | 120 -110 | HSX | N31W92 | |
Region 8299 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 6 | 320 -90 | DAO | N16W80 | |
Region 8301 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 -1 | 100 -10 | HSX | S22W58 | |
Region 8303 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 5 | 20 | BXO | N20W14 | |
Region 8304 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 -1 | 90 -20 | CSO | S30E16 | |
Region 8305 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 | 10 -40 | BXO | S24W46 | |
Region 8306 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 1 | 50 | HSX | N27E30 | |
Region 8307 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 7 | 330 | DHO | N32E72 | |
Solar flares on this day | ||||
| C8.27 | ||||
Region 8308 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 1 | 110 50 | HAX | S22E58 | |
Region 8309 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 | 0 | AXX | N18E28 | |
All times in UTC
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| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/04/02 | M3.5 |
| Last geomagnetic storm | 2026/03/25 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
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| April 2026 | 130 +51.8 |
| Last 30 days | 91.6 +20.3 |
