Daily Sunspot Evaluation
Observation Sheet Thursday, 25 September 1997
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)
- 3
- Number of spots (f)
- 31
- Relative number (R)
- 61
- Observer
- NA
- Reading
- all checks consistent
- File
- 19970925.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EHI – 25 | -30 | 07E | 125 | 04E | 11.5 | 76 |
| 2 | HA – 2 | -22 | 28E | 104 | 25E | 1.5 | 77 |
| 3 | BXO – 4 | -27 | 40E | 92 | 37E | 3.5 | 78 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.