Daily Sunspot Evaluation
Observation Sheet Monday, 20 April 1992
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)
- 64
- Relative number (R)
- 154
- Observer
- HE
- Reading
- all checks consistent
- File
- 19920420.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 6 | 59W | 99 | 060 | 1 | 162 |
| 2 | HK – 5 | 10 | 60E | 340 | 058 | 4 | 173 |
| 3 | HA – 1 | -16 | 68W | 108 | 069 | 2.5 | 158 |
| 4 | DBO – 8 | -20 | 47W | 87 | 048 | 7.5 | 165 |
| 5 | EAO – 8 | -27 | 03W | 43 | 094 | 15 | 161 |
| 6 | BAI – 25 | -16 | 35E | 5 | 034 | 19.5 | 167 |
| 7 | BAI – 11 | -20 | 54E | 346 | 053 | 11 | 169 |
| 8 | BXI – 4 | -17 | 62E | 338 | 061 | 5.5 | 172 |
| 9 | AR – 1 | -10 | 67E | 333 | 066 | 1 | 171 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.