Viewing archive of Saturday, 31 July 1999 - Sunspot regions
Courtesy of SDO, SOHO (NASA) and the [MDI, AIA, EVE, and/or HMI] consortium.
| Sunspot number | New regions | Background flux | Maximum flux | C |
|---|---|---|---|---|
| 220 2 | 1 1 | C1.57 | C6.57 | 11 |
Sunspot regions
Region 8636 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 -4 | 80 -280 | CAO | N21W90 | |
Region 8640 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 -3 | 100 -10 | CSO | N16W55 | |
Region 8644 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 -1 | 20 -10 | CRO | S25W23 | |
Region 8645 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 37 3 | 620 30 | FAO | S25W03 | |
Solar flares on this day | ||||
| C3.33 C3.56 C4.49 | ||||
Region 8647 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 11 -6 | 40 -10 | CSO | S17W03 | |
Region 8648 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 1 | 10 | BXO | N23E16 | |
Region 8649 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 25 4 | 170 70 | DAO | S15W30 | |
Region 8650 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 -3 | 50 | HSX | N16E36 | |
Region 8651 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 26 1 | 510 300 | DAI | N24E36 | |
Solar flares on this day | ||||
| C3.39 C5.91 C3.49 C3.39 | ||||
Region 8653 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 | 20 10 | BXO | N29W58 | |
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| Spotless days | |
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