Daily Sunspot Evaluation
Observation Sheet Thursday, 19 March 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)
- 6
- Number of spots (f)
- 15
- Relative number (R)
- 75
- Observer
- SM
- Reading
- all checks consistent
- File
- 19700319.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 16 | 70E | 260 | |||
| 2 | J – 1 | -4 | 69E | 261 | |||
| 3 | J – 1 | -15 | 26E | 304 | |||
| 4 | J – 6 | -1 | 53W | 23 | |||
| 5 | A – 2 | 20 | 21W | 351 | |||
| 6 | B – 3 | 15 | 05W | 335 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.