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Sky-Tonight.com / Sun / SunSpots / Sunspot Region 4199

Sunspot AR 4199

Sunspot AR 4199 is a moderate-sized, magnetically basic active region currently visible on the Sun’s surface. It contains 8 visible spots and spans an area of 180 millionths of the solar hemisphere. This region has produced 5 M-class flares so far and currently shows a 20% probability of C-class, 1% of M-class, and 1% of X-class flares. It is located at heliographic latitude N4°, Earth-facing longitude 18°, and Carrington longitude 116°.

Sunspot Location on Map

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Selected map type: AIA 171 Å

Sunspot Properties

Region Number4199
First Observed2025-08-25 09:44
Sunspot TypeCai
Magnetic ClassB
Area180 MSH
Number of Spots8
Extent3 heliographic degrees
Latitude4°
Longitude18°
Carrington Longitude116
Statusf

Flare Activity

Flare Class Begin Time (UTC) Peak Time (UTC) End Time (UTC) Location Duration
M3.32025-08-25 15:222025-08-25 15:302025-08-25 15:35N02E808 minutes
M1.12025-08-25 06:302025-08-25 06:382025-08-25 06:41N06E908 minutes
M1.22025-08-25 06:062025-08-25 06:182025-08-25 06:28N04E8712 minutes
M4.52025-08-24 20:012025-08-24 20:242025-08-24 20:40N05E9023 minutes
M1.32025-08-23 23:262025-08-23 23:362025-08-23 23:42N07E9010 minutes

Sunspot Evolution

The following graphs show how this sunspot region 4199 has changed over time. The first graph displays its total area on the solar surface, while the second shows the number of individual sunspots observed within the region.

Sunspot Area

Area 0 221

This graph illustrates the physical growth of the sunspot region, measured in millionths of the solar hemisphere (MSH). Increases in area typically indicate developing magnetic complexity and potential for solar activity.

Spot Count

Sunspots 0 10

This graph shows the number of visible sunspots within the region at each observation time. A higher spot count often corresponds with a more active or complex region.

Detailed History

Date Area (MSH) Spot Count Classification Flares Location
2025-08-291808Cai-N04E18
2025-08-282005Cao-N04E32
2025-08-271709Cao-N04E45
2025-08-262007CaoM3.3, 15:22-15:35N04E59
2025-08-251104DaiM3.3, 15:22-15:35N05E70

Acknowledgements

We gratefully thank the teams behind the Solar Dynamics Observatory (SDO), including the HMI, AIA, and EVE instrument teams, for their continuous work in solar monitoring.

We also thank the National Aeronautics and Space Administration (NASA), the Goddard Space Flight Center (GSFC), and the National Oceanic and Atmospheric Administration (NOAA) for their contributions to solar science and public data access.

Additional event data is provided by NASA’s DONKI (Database of Notifications, Knowledge, Information), which offers alerts and detailed records of solar flares, CMEs, and geomagnetic storms.