Viewing archive of Tuesday, 21 September 2004 - 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 | M |
|---|---|---|---|---|
| 33 -26 | 0 -1 | B2 | M1.08 | 1 |
Sunspot regions
Region 10672 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 7 | 80 10 | DSO | N05W71 | |
Region 10673 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 18 3 | 310 10 | DHO | S13E09 | |
Region 10674 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 | 10 | BXO | S10W23 | |
All times in UTC
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| Spotless days | |
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