Daily Sunspot Evaluation
Observation Sheet Thursday, 30 July 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)
- 13
- Number of spots (f)
- 82
- Relative number (R)
- 212
- Observer
- HA
- Reading
- all checks consistent
- File
- 19700730.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 3 | 10 | 11E | 0 | |||
| 2 | J – 1 | -9 | 38E | 332 | |||
| 3 | H – 15 | -9 | 14E | 357 | |||
| 4 | G – 6 | -13 | 34W | 45 | |||
| 5 | B – 6 | 0 | 12W | 23 | |||
| 6 | E – 14 | 6 | 14W | 25 | |||
| 7 | ? – 4 | 10 | 79W | 90 | |||
| 8 | J – 1 | 14 | 38W | 49 | |||
| 9 | C – 22 | 18 | 34W | 45 | O | ||
| 10 | A – 1 | 19 | 22W | 33 | |||
| 11 | G – 2 | 25 | 32W | 43 | |||
| 12 | A – 1 | 25 | 16W | 27 | |||
| 13 | A – 6 | 12 | 0W | 12 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.