30 April 2018
⇐20180429 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180501⇒

NOAA
2 Active Regions
12706
12707

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 W10N51
(106",781") 		E53-W66
(119) 		6.5 0.6 3.7e33
2 W25S67
(156",-851") 		E75-W81
(156) 		3.2 -1.1 -5.6e33
3 E41S04
(-629",-15") 		E61-E26
(35) 		1.7 -1.9 -1.4e33
4 E46S14
(-667",-187") 		E50-E41
(9) 		0.1 -0.9 -7.3e31
5 W21N15
(333",306") 		W17-W23
(6) 		0.1 -0.8 -2.3e31

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 30-Apr-2018 15:30 UT .