Daily Sunspot Evaluation
Observation Sheet Thursday, 7 May 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)
- 9
- Number of spots (f)
- 42
- Relative number (R)
- 132
- Observer
- SM
- Reading
- all checks consistent
- File
- 19700507.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 16 | 16 | 32E | 11 | |||
| 2 | H – 6 | 13 | 40E | 3 | |||
| 3 | J – 1 | -22 | 28W | 71 | |||
| 4 | H – 2 | -13 | 17W | 60 | |||
| 5 | A – 1 | -16 | 36W | 79 | |||
| 6 | A – 1 | -9 | 19W | 62 | |||
| 7 | J – 1 | -13 | 68W | 111 | |||
| 8 | ? – 3 | -8 | 78W | 121 | |||
| 9 | H – 11 | 12 | 12W | 55 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.