Daily Sunspot Evaluation
Observation Sheet Monday, 18 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)
- 114
- Relative number (R)
- 204
- Observer
- EH
- Reading
- all checks consistent
- File
- 19700518.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 40 | 17 | 02E | 255 | |||
| 2 | H – 6 | 15 | 57E | 200 | |||
| 3 | A – 7 | -9 | 48E | 209 | |||
| 4 | C – 8 | -10 | 17E | 240 | |||
| 5 | H – 6 | -13 | 16W | 273 | |||
| 6 | B – 7 | -15 | 44W | 301 | |||
| 7 | J – 3 | -9 | 23W | 280 | |||
| 8 | F – 31 | -9 | 50W | 307 | |||
| 9 | G – 6 | 19 | 39W | 296 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.