3 October 2021
⇐20211002 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211004⇒

NOAA
4 Active Regions
12877
12880
12878
12881

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 W07N04
(110",-40") 		E18-W22
(40) 		2.8 0.2 6.6e19
2 W38N73
(171",887") 		E73-W90
(163) 		1.5 1.1 7.2e20
3 E14S39
(-178",-688") 		E22-E04
(18) 		0.6 -1.4 -1.9e20
4 E26S67
(-166",-915") 		E49-E13
(36) 		0.3 -0.4 -6.0e19
5 W41S20
(594",-410") 		W37-W44
(7) 		0.1 -1.4 -3.8e19
6 W30N45
(336",610") 		W28-W32
(4) 		0.1 -0.8 -2.0e19
7 W56N07
(787",46") 		W53-W58
(5) 		0.0 -0.5 -6.0e18
8 W36N06
(567",13") 		W34-W39
(5) 		0.0 -1.0 -7.2e18
9 E47N06
(-696",32") 		E49-E45
(4) 		0.0 0.4 3.5e18

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 3-Oct-2021 23:30 UT .