Daily Sunspot Evaluation
Observation Sheet Tuesday, 7 May 1974
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)
- 80
- Relative number (R)
- 170
- Observer
- HM
- Reading
- all checks consistent
- File
- 19740507.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | -9 | 20E | 179 | |||
| 2 | J – 1 | -14 | 27E | 172 | |||
| 3 | C – 47 | -13 | 08E | 191 | |||
| 4 | B – 3 | -17 | 08E | 191 | |||
| 5 | J – 11 | -7 | 07W | 206 | |||
| 6 | A – 2 | -10 | 42W | 241 | |||
| 7 | G – 10 | -5 | 22W | 221 | |||
| 8 | J – 1 | -3 | 26W | 225 | |||
| 9 | A – 3 | 11 | 66W | 265 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.