Daily Sunspot Evaluation
Observation Sheet Tuesday, 13 October 1970
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)
- 97
- Relative number (R)
- 177
- Observer
- FA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19701013.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 18 | 70E | 30 | |||
| 2 | A – 1 | 10 | 56E | 44 | |||
| 3 | E – 20 | 5 | 44E | 56 | |||
| 4 | D – 6 | -13 | 58E | 40 | |||
| 5 | D – 23 | -13 | 18W | 118 | |||
| 6 | ? – 6 | -13 | 8W | 181 ⚠ | |||
| 7 | A – 2 | 15 | 78W | 138 ⚠ | |||
| 8 | E – 38 | 18 | 22W | 182 ⚠ |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.