23 April 2020
⇐20200422 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20200424⇒

NOAA
0 Active Regions

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 E17S15
(-273",-179") 		E30-W01
(31) 		4.7 0.1 9.2e19
2 W16N01
(268",100") 		E08-W30
(38) 		4.7 -0.1 -7.9e19
3 W08S67
(53",-847") 		E56-W74
(130) 		4.1 -1.1 -6.3e21
4 W27S20
(414",-256") 		W11-W36
(25) 		1.5 0.1 2.7e19
5 W54S26
(691",-373") 		W49-W58
(9) 		0.1 -0.5 -4.6e19
6 E17N19
(-259",390") 		E18-E15
(3) 		0.0 -0.8 -1.2e19
7 W07N25
(109",475") 		W06-W09
(3) 		0.0 -0.7 -8.8e18

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 23-Apr-2020 19:30 UT .