20 December 2018
⇐20181219 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20181221⇒

NOAA
1 Active Region
12731

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 E06N60
(-53",859") 		E70-W53
(123) 		3.2 0.5 2.1e21
2 E34S65
(-232",-874") 		E45-E06
(39) 		1.2 -0.8 -2.1e21
3 E03N10
(-55",198") 		E12-W06
(18) 		0.9 -1.5 -2.5e20
4 E52N08
(-760",146") 		17
(3.5e04) 		1.6 8.5 3.0e21
5 W43S67
(252",-894") 		W20-W73
(53) 		0.4 -1.1 -1.5e21
6 W58S31
(709",-492") 		W53-W61
(8) 		0.3 -0.5 -1.9e20

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 20-Dec-2018 20:30 UT .