Daily Sunspot Evaluation
Observation Sheet Tuesday, 25 September 1973
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)
- 8
- Number of spots (f)
- 40
- Relative number (R)
- 120
- Observer
- HM
- Reading
- counts consistent, some coordinates doubtful
- File
- 19730925.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 23 | 14 | 20E | 252 | 175 | ||
| 2 | J – 1 | 21 | 73E | 199 | 184 | ||
| 3 | A – 4 | 9 | 15E | 257 | 185 | ||
| 4 | H – 5 | 5 | 13E | 259 | 176 | ||
| 5 | ? – 1 | -16 | 80E | 192 | 186 | ||
| 6 | A – 1 | -30 | 11E | 261 | 187 | ||
| 7 | A – 3 | 5 | 12E | 284 ⚠ | 179 | ||
| 8 | A – 2 | 15 | 55W | 322 ⚠ | 170 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.