Sunspot AR 4126

Sunspot AR 4126 is a small, magnetically simple active region currently visible on the Sun’s surface. It contains 1 visible spot and spans an area of 20 millionths of the solar hemisphere. This region has produced 1 C-class flare so far and currently shows a 5% probability of C-class, 1% of M-class, and 1% of X-class flares. It is located at heliographic latitude N8°, Earth-facing longitude -66°, and Carrington longitude 261°.

Sunspot Location on Map

Double-click to unlock the map

Selected map type: AIA 171 Å

Sunspot Properties

Region Number	4126
First Observed	2025-06-28 14:09
Sunspot Type	Hrx
Magnetic Class	A
Area	20 MSH
Number of Spots	1
Extent	1 heliographic degree
Latitude	8°
Longitude	-66°
Carrington Longitude	261
Status	f

Flare Activity

Flare Class	Begin Time (UTC)	Peak Time (UTC)	End Time (UTC)	Location	Duration
C4.0	2025-06-28 15:40	2025-06-28 15:54	2025-06-28 16:01	N07W22	14 minutes

Sunspot Evolution

The following graphs show how this sunspot region 4126 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

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

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
2025-07-01	20	1	Hrx	-	N08W66
2025-06-30	5	1	Axx	-	N08W56
2025-06-29	10	3	Cso	-	N07W42
2025-06-28	20	3	Cro	C4.0, 15:40-16:01	N07W27

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.

Observation Settings