Daily Sunspot Evaluation
Observation Sheet Tuesday, 15 January 1974
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)
- 7
- Number of spots (f)
- 32
- Relative number (R)
- 102
- Observer
- HM
- Reading
- all checks consistent
- File
- 19740115.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 2 | -14 | 64E | 170 | |||
| 2 | A – 2 | -17 | 55E | 179 | |||
| 3 | G – 3 | -17 | 39E | 195 | |||
| 4 | J – 3 | -16 | 18E | 216 | |||
| 5 | C – 9 | -13 | 11W | 245 | |||
| 6 | A – 1 | 5 | 80W | 314 | |||
| 7 | D – 12 | 8 | 24W | 258 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.