Daily Sunspot Evaluation
Observation Sheet Thursday, 15 January 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)
- 14
- Number of spots (f)
- 67
- Relative number (R)
- 207
- Observer
- TY
- Reading
- all checks consistent
- File
- 19700115.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 4 | 13 | 17E | 58 | |||
| 2 | B – 5 | 15 | 58E | 17 | |||
| 3 | H – 8 | -7 | 45E | 30 | |||
| 4 | G – 14 | -10 | 25E | 50 | |||
| 5 | A – 2 | -10 | 67E | 8 | |||
| 6 | A – 1 | -8 | 13E | 62 | |||
| 7 | A – 1 | -14 | 27E | 48 | |||
| 8 | J – 1 | -15 | 19E | 56 | |||
| 9 | B – 12 | -11 | 0 | 75 | |||
| 10 | C – 3 | -20 | 18W | 93 | |||
| 11 | G – 8 | -12 | 23W | 98 | |||
| 12 | J – 2 | -12 | 42W | 117 | |||
| 13 | A – 2 | -8 | 37W | 112 | |||
| 14 | B – 4 | 17 | 20W | 95 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.