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Sky-Tonight.com / Sun / Sunspots / Sunspot Region 4420

Sunspot AR 4420

Sunspot AR 4420 is a large, magnetically complex active region currently visible on the Sun’s surface. It contains 24 visible spots and spans an area of 360 millionths of the solar hemisphere. This region has produced 5 M-class flares so far and currently shows a 90% probability of C-class, 60% of M-class, and 20% of X-class flares. It is located at heliographic latitude N16°, Earth-facing longitude -29°, and Carrington longitude 226°.

Sunspot Location on Map

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Selected map type: AIA 171 Å

Sunspot Properties

Region Number4420
First Observed2026-04-21 01:25
Sunspot TypeFkc
Magnetic ClassBGD
Area360 MSH
Number of Spots24
Extent17 heliographic degrees
Latitude16°
Longitude-29°
Carrington Longitude226
Statusf

Flare Activity

Flare Class Begin Time (UTC) Peak Time (UTC) End Time (UTC) Location Duration
M6.02026-04-26 13:512026-04-26 13:572026-04-26 14:02N15W186 minutes
M1.72026-04-26 10:182026-04-26 10:242026-04-26 10:27N17W146 minutes
M1.42026-04-26 04:542026-04-26 05:032026-04-26 05:08N15W159 minutes
M1.22026-04-22 19:502026-04-22 19:592026-04-22 20:08N16E359 minutes
M1.22026-04-22 19:412026-04-22 19:442026-04-22 19:46N16E403 minutes

Sunspot Evolution

The following graphs show how this sunspot region 4420 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 0 441

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 33

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
2026-04-2736024Fkc-N16W29
2026-04-2638030FkcM6.0, 13:51-14:02N16W16
2026-04-2540030Fki-N16W01
2026-04-2428020Eki-N17E10
2026-04-2325020EkiM6.0, 13:51-14:02N16E25
2026-04-2218015Dai-N16E38
2026-04-21606Dao-N16E52

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.