Viewing archive of Thursday, 4 March 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 |
|---|---|---|---|---|
| 144 -4 | 0 -1 | B6.14 | C2 | 5 |
Sunspot regions
Region 8471 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 11 -8 | 170 10 | CAO | N29W53 | |
Region 8475 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 17 2 | 140 -10 | EAO | N31W11 | |
Region 8476 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 21 6 | 150 80 | DSI | N18W23 | |
Region 8477 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 5 1 | 110 | DSO | S26E40 | |
Solar flares on this day | ||||
| C1.49 | ||||
Region 8478 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 5 2 | 20 | CRO | S15W40 | |
Region 8479 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 5 2 | 20 | CSO | S14W32 | |
Region 8480 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 1 | 10 10 | BXO | N25E51 | |
Region 8481 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 | 10 | BXO | S18W15 | |
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| Spotless days | |
|---|---|
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| Monthly mean Sunspot Number | |
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