Daily Sunspot Evaluation
Observation Sheet Sunday, 18 June 1967
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)
- 7
- Number of spots (f)
- 29
- Relative number (R)
- 99
- Observer
- LT
- Reading
- all checks consistent
- File
- 19670618.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 5 | 25 | 43E | 229 | |||
| 2 | A – 1 | 15 | 23E | 249 | |||
| 3 | J – 2 | 18 | 36E | 237 | |||
| 4 | C – 11 | 24 | 59E | 213 | |||
| 5 | J – 1 | 9 | 74E | 199 | |||
| 6 | J – 2 | -21 | 54E | 218 | |||
| 7 | B – 7 | -20 | 21E | 251 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.