19 December 2018
⇐20181218 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20181220⇒

NOAA
2 Active Regions
12730
12731

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 E14N64
(-105",886") 		E73-W68
(141) 		2.6 0.8 4.0e21
2 E17N07
(-288",139") 		E29-E03
(26) 		1.2 -1.1 -2.8e20
3 W33S70
(184",-907") 		E21-W63
(84) 		0.9 -1.1 -3.1e21
4 W40S32
(530",-502") 		W24-W54
(30) 		0.8 -0.9 -4.4e20
5 E48S64
(-310",-873") 		E61-E23
(38) 		0.6 -0.8 -1.4e21
6 W39S09
(613",-130") 		W36-W42
(6) 		0.1 -0.8 -4.3e19
7 W65S59
(454",-832") 		W65-W66
(1) 		0.1 -0.6 -3.9e20
8 W32N12
(502",229") 		W30-W33
(3) 		0.1 -1.3 -3.3e19
9 E07N31
(-103",526") 		E09-E05
(4) 		0.1 -0.7 -1.3e19
10 E36S31
(-493",-486") 		E38-E34
(4) 		0.1 -0.6 -1.8e19
11 W50S20
(702",-315") 		W47-W51
(4) 		0.0 -1.8 -5.3e19

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 19-Dec-2018 20:30 UT .