Daily Sunspot Evaluation
Observation Sheet Tuesday, 18 October 1983
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)
- 5
- Number of spots (f)
- 21
- Relative number (R)
- 71
- Observer
- FY
- Reading
- all checks consistent
- File
- 19831018.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKC – 7 | 21 | 70W | 76 | +2W | 10 | 307 |
| 2 | AXX – 1 | -12 | 20W | 26 | 22W | 0.5 | 310 |
| 3 | CSI – 7 | -4 | 11W | 17 | 13W | 6 | 311 |
| 4 | BXO – 5 | -11 | 11E | 355 | 09E | 3 | 315 |
| 5 | AXX – 1 | -15 | 34E | 332 | 32E | 0.5 | 319 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.