Daily Sunspot Evaluation
Observation Sheet Thursday, 15 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)
- 6
- Number of spots (f)
- 51
- Relative number (R)
- 111
- Observer
- HA
- Reading
- all checks consistent
- File
- 19701015.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 18 | 42E | 32 | |||
| 2 | D – 9 | 11 | 27E | 47 | |||
| 3 | E – 32 | 5 | 15E | 59 | |||
| 4 | G – 6 | -13 | 30E | 44 | |||
| 5 | A – 1 | -12 | 44W | 118 | |||
| 6 | G – 2 | 18 | 54W | 128 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.