Daily Sunspot Evaluation
Observation Sheet Tuesday, 15 February 1972
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)
- 67
- Relative number (R)
- 137
- Observer
- ED
- Reading
- counts consistent, some coordinates doubtful
- File
- 19720215.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 24 | 18E | 95 | |||
| 2 | C – 22 | -9 | 56E | 59 | |||
| 3 | A – 2 | -12 | 69E | 44 | |||
| 4 | E – 15 | -17 | 14E | 93 ⚠ | |||
| 5 | D – 19 | -21 | 24E | 89 | |||
| 6 | B – 6 | -9 | 30W | 143 | |||
| 7 | H – 2 | 17 | 11W | 124 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.