4 May 2019
⇐20190503 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190505⇒

NOAA
1 Active Region
12740

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 -461
(-641",W00S46") 		56
(5.5e05) 		-0.5 5.4 3.0e22
2 W11N70
(61",913") 		E39-W52
(91) 		0.6 1.3 3.2e21
3 E05N39
(-61",652") 		E08-W04
(12) 		0.2 -0.7 -7.3e19
4 E68S67
(-343",-865") 		E80-E74
(6) 		0.1 -1.3 -6.8e20

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-May-2019 22:00 UT .