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Sky-Tonight.com / Sun / SunSpots / Sunspot Region 4392

Sunspot AR 4392

Sunspot AR 4392 is a moderate-sized, magnetically basic active region currently visible on the Sun’s surface. It contains 3 visible spots and spans an area of 120 millionths of the solar hemisphere. This region has produced 1 C-class flare, 4 M-class flares so far and currently shows a 20% probability of C-class, 5% of M-class, and 1% of X-class flares. It is located at heliographic latitude S18°, Earth-facing longitude -65°, and Carrington longitude 17°.

Sunspot Location on Map

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Selected map type: AIA 171 Å

Sunspot Properties

Region Number4392
First Observed2026-03-11 10:34
Sunspot TypeCso
Magnetic ClassB
Area120 MSH
Number of Spots3
Extent3 heliographic degrees
Latitude-18°
Longitude-65°
Carrington Longitude17
Statusf

Flare Activity

Flare Class Begin Time (UTC) Peak Time (UTC) End Time (UTC) Location Duration
M2.72026-03-17 23:262026-03-17 23:422026-03-17 23:57S16W0516 minutes
M1.32026-03-16 23:552026-03-17 00:042026-03-17 00:09S14E109 minutes
M2.72026-03-16 03:002026-03-16 03:152026-03-16 03:24S15E1915 minutes
M1.02026-03-15 00:212026-03-15 00:392026-03-15 00:52S15E3518 minutes
C8.92026-03-13 11:092026-03-13 11:232026-03-13 11:32S15E5314 minutes

Sunspot Evolution

The following graphs show how this sunspot region 4392 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 18

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
2026-03-221203Cso-S18W65
2026-03-211103Cso-S17W52
2026-03-201305Cso-S16W40
2026-03-1917012Csi-S17W26
2026-03-1817013CsiM2.7, 23:26-23:57S17W12
2026-03-1720016CsiM2.7, 23:26-23:57S16E01
2026-03-1616012CsiM2.7, 23:26-23:57S16E15
2026-03-151709CsoM2.7, 23:26-23:57S16E28
2026-03-14903Cso-S15E41
2026-03-131203CsoM2.7, 23:26-23:57S15E54
2026-03-12801Hsx-S16E65
2026-03-11801Hsx-S15E79

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.