31 December 2018
⇐20181230 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190101⇒

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 E22S19
(-345",-278") 		E50-W15
(65) 		14.0 -0.6 -2.5e21
2 W42N61
(317",872") 		W21-W59
(38) 		0.8 1.0 2.4e21
3 E34S75
(-144",-930") 		E67-E39
(28) 		0.1 -1.0 -4.8e20
4 E54N06
(-790",128") 		E57-E51
(6) 		0.1 -1.5 -1.4e20
5 E13N25
(-204",453") 		E16-E11
(5) 		0.1 -1.2 -2.2e19
6 E29S43
(-348",-639") 		E33-E26
(7) 		0.1 2.2 6.5e19
7 W30N29
(431",517") 		W28-W33
(5) 		0.0 -1.7 -3.5e19

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 31-Dec-2018 20:30 UT .