Viewing archive of Sunday, 28 February 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 | M |
|---|---|---|---|---|---|
| 145 52 | 2 | B2.86 | M9.44 | 3 | 1 |
Sunspot regions
Region 8470 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 -3 | 30 -10 | HSX | S23E04 | |
Region 8471 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 14 -1 | 80 20 | DSO | N29E01 | |
Solar flares on this day | ||||
| C1.54 B9.14 M9.44 C3.2 | ||||
Region 8472 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 9 1 | 10 -40 | BXO | N30E27 | |
Region 8473 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 -1 | 0 -10 | BXO | N18W04 | |
Region 8474 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 2 | 10 | BXO | S24W38 | |
Region 8475 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 5 | 10 | BXO | N32E43 | |
All times in UTC
Latest news
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Complex sunspot region 4366
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Latest forum messages
AR4366 490Space Weather Memes 783Do the high-resolution sunspot counts point to more complex sunspots? 44JHelioviewer Tips and Settings 38Incoming & Unnumbered Active Regions 141
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| Last M-flare | 2026/02/02 | M2.3 |
| Last geomagnetic storm | 2026/01/28 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| December 2025 | 124 +32.2 |
| February 2026 | 97 -27 |
| Last 30 days | 118.3 +3.5 |