4 August 2021
⇐20210803 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210805⇒

NOAA
1 Active Region
12850

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 E03S12
(-52",-295") 		E41-W32
(73) 		10.0 -0.6 -9.5e20
2 W17N60
(138",768") 		E69-W33
(102) 		5.3 1.1 1.5e21
3 E52S37
(-598",-617") 		E60-E50
(10) 		0.2 -2.0 -1.4e20
4 W04S71
(19",-924") 		E14-W21
(35) 		0.1 -0.6 -5.5e19
5 E57N43
(-579",604") 		E60-E55
(5) 		0.1 1.6 5.9e19

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 4-Aug-2021 23:30 UT .