1 May 2018
⇐20180430 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180502⇒

NOAA
1 Active Region
12706

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 W14N54
(139",806") 		E37-W40
(77) 		4.9 0.7 4.0e33
2 E31S07
(-490",-51") 		E54-E12
(42) 		3.2 -1.7 -1.7e33
3 W26S69
(146",-868") 		E71-W57
(128) 		2.4 -1.0 -5.1e33
4 E57N07
(-792",153") 		E63-E51
(12) 		0.2 -1.7 -3.1e32
5 W20N33
(272",579") 		W16-W23
(7) 		0.1 -0.5 -2.0e31
6 W25N27
(364",491") 		W24-W27
(3) 		0.0 -1.2 -1.9e31

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-May-2018 15:30 UT .