Sunspot AR 4118

Sunspot AR 4118 is a small, magnetically basic active region currently visible on the Sun’s surface. It contains 5 visible spots and spans an area of 10 millionths of the solar hemisphere. This region has produced 1 M-class flare so far and currently shows a 0% probability of C-class, 0% of M-class, and 0% of X-class flares. It is located at heliographic latitude S13°, Earth-facing longitude -102°, and Carrington longitude 297°.

Sunspot Location on Map

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Selected map type: AIA 171 Å

Sunspot Properties

Region Number	4118
First Observed	2025-06-19 04:09
Sunspot Type	Bxo
Magnetic Class	B
Area	10 MSH
Number of Spots	5
Extent	5 heliographic degrees
Latitude	-13°
Longitude	-102°
Carrington Longitude	297
Status	d

Flare Activity

Flare Class	Begin Time (UTC)	Peak Time (UTC)	End Time (UTC)	Location	Duration
M1.0	2025-06-20 13:21	2025-06-20 13:40	2025-06-20 13:59	S12E45	19 minutes

Sunspot Evolution

The following graphs show how this sunspot region 4118 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	10	5	Bxo	-	S13W0*
2025-06-30	10	5	Bxo	-	S13W88
2025-06-29	10	5	Bxo	-	S13W74
2025-06-27	10	4	Bxo	-	S13W45
2025-06-26	40	7	Cai	-	S13W33
2025-06-25	70	9	Cai	-	S12W20
2025-06-24	80	10	Cai	-	S12W07
2025-06-23	120	11	Dai	-	S12E08
2025-06-22	120	12	Dai	-	S13E22
2025-06-21	60	3	Cao	-	S14E36
2025-06-20	20	2	Hsx	M1.0, 13:21-13:59	S13E50
2025-06-19	50	3	Dao	-	S14E62

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