18 January 2021
⇐20210117 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210119⇒

NOAA
2 Active Regions
12796
12797

Flare Forecast
Flare Prediction System
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W20N43
(237",727") 		E63-W47
(110) 		7.9 1.0 1.8e21
2 W19N03
(311",134") 		E05-W39
(44) 		4.3 -0.1 -9.7e19
3 W18S67
(119",-863") 		E64-W64
(128) 		3.7 -1.0 -1.3e21
4 E43S15
(-639",-191") 		E51-E35
(16) 		1.0 -2.2 -4.7e20

Note: Solar Monitor's coronal hole segmentations are performed by CHIMERA, a copy of which is available at: github.com/TCDSolar/CHIMERA.

The operations of the CHIMERA algorithm is described in a peer reviewed paper: arxiv.org/abs/1711.11476.

An extensive copy of coronal hole properties are available at: solarmonitor.org/data.

The latest positions of the coronal holes are given in heliocentric co-ordinates, and the region positions are valid on 18-Jan-2021 20:30 UT .