1 February 2020
⇐20200131 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20200202⇒

NOAA
1 Active Region
12757

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 W05S08
(76",-35") 		E43-W47
(90) 		10.9 -0.1 -2.0e20
2 E10S56
(-95",-749") 		E73-W84
(157) 		9.2 -0.8 -4.9e21
3 W27S34
(366",-467") 		W21-W35
(14) 		0.6 0.6 1.3e20
4 E50S07
(-748",-48") 		E60-E40
(20) 		0.5 0.4 1.5e20
5 E08N17
(-131",379") 		E10-E05
(5) 		0.1 -0.9 -1.8e19
6 W52S09
(765",-84") 		W49-W56
(7) 		0.1 -1.1 -3.9e19

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 1-Feb-2020 20:30 UT .