Daily Sunspot Evaluation
Observation Sheet Tuesday, 15 July 1980
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 10
- Number of spots (f)
- 98
- Relative number (R)
- 198
- Observer
- HM
- Reading
- all checks consistent
- File
- 19800715.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 9 | 17 | 50°W | 285 | 53°W | 4.5 | |
| 2 | DSC – 8 | 18 | 03E | 232 | 00 | 10 | |
| 3 | DAE – 9 | 18 | 64E | 171 | 61E | 9 | |
| 4 | AXX – 1 | 5 | 75E | 160 | 72E | - | |
| 5 | BAO – 2 | 14 | 80E | 155 | 77E | 7 | |
| 6 | HAX – 2 | -13 | 42W | 277 | 45W | 2.5 | |
| 7 | EKC – 57 | -12 | 27E | 208 | 24E | 12 | |
| 8 | HAX – 7 | -11 | 46E | 189 | 43E | 3.5 | |
| 9 | HKA – 1 | -24 | 62E | 173 | 59E | 5 | |
| 10 | HAX – 2 | -20 | 77E | 158 | 74E | 5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.