27 March 2021
⇐20210326 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210328⇒

NOAA
3 Active Regions
12811
12812
12810

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 E21N01
(-352",118") 		E38-E01
(37) 		3.0 0.5 2.6e20
2 W19S04
(306",40") 		E01-W36
(37) 		2.6 -0.2 -7.5e19
3 W28N55
(260",842") 		E38-W35
(73) 		2.0 0.5 4.1e20
4 E08S73
(-39",-881") 		E71-W81
(152) 		1.9 -1.6 -1.1e21
5 W16S32
(220",-407") 		W03-W24
(21) 		0.7 -2.4 -2.8e20
6 W31S20
(474",-234") 		W22-W39
(17) 		0.7 -2.2 -2.7e20
7 E49S04
(-729",7") 		E61-E42
(19) 		0.5 0.7 8.0e19
8 W26S10
(414",-63") 		W22-W29
(7) 		0.1 -0.7 -1.6e19
9 W56S08
(793",-73") 		W52-W60
(8) 		0.1 -2.3 -5.8e19
10 W01N03
(12",168") 		E02-W03
(5) 		0.1 -2.3 -2.8e19
11 E13S08
(-215",-18") 		E16-E11
(5) 		0.0 -2.4 -1.8e19

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 27-Mar-2021 20:30 UT .