Daily Sunspot Evaluation
Observation Sheet Thursday, 16 March 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)
- 8
- Number of spots (f)
- 45
- Relative number (R)
- 125
- Observer
- ED
- Reading
- all checks consistent
- File
- 19720316.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 3 | 9 | 51E | 28 | |||
| 2 | A – 3 | -6 | 23E | 56 | |||
| 3 | A – 1 | -19 | 12W | 91 | |||
| 4 | J – 1 | -21 | 65W | 144 | |||
| 5 | J – 1 | 17 | 40W | 119 | |||
| 6 | C – 7 | 14 | 32W | 111 | |||
| 7 | D – 15 | 7 | 10W | 89 | |||
| 8 | B – 14 | 16 | 22W | 101 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.