Daily Sunspot Evaluation
Observation Sheet Sunday, 12 March 1978
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)
- 31
- Relative number (R)
- 91
- Observer
- HM
- Reading
- all checks consistent
- File
- 19780312.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 7 | 16 | 21E | 354 | 18E | ||
| 2 | C – 9 | -2 | 20E | 355 | 17E | ||
| 3 | E – 9 | -31 | 59E | 316 | 56E | ||
| 4 | ? – 2 | 18 | 70W | 85 | 73W | ||
| 5 | J – 1 | 26 | 52W | 67 | 55W | ||
| 6 | H – 3 | 15 | 24W | 39 | 27W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.