Daily Sunspot Evaluation
Observation Sheet Tuesday, 1 April 1969
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)
- 97
- Relative number (R)
- 167
- Observer
- FY
- Reading
- all checks consistent
- File
- 19690401.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 11 | 06E | 289 | |||
| 2 | F – 60 | 8 | 17E | 278 | |||
| 3 | H – 12 | 19 | 37E | 258 | |||
| 4 | C – 9 | -10 | 39W | 334 | |||
| 5 | ? – 12 | 23 | 11W | 306 | |||
| 6 | A – 1 | 31 | 08W | 303 | |||
| 7 | A – 1 | 25 | 03W | 298 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.