20 August 2021
⇐20210819 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210821⇒

NOAA
3 Active Regions
12857
12858
12855

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 W26S05
(411",-186") 		E22-W52
(74) 		6.2 -0.0 -2.9e19
2 E14N55
(-135",712") 		E90-W26
(116) 		5.9 0.8 1.1e21
3 W08N27
(117",329") 		W04-W14
(10) 		0.3 1.2 6.3e19
4 W31S67
(190",-907") 		W07-W49
(42) 		0.3 -0.9 -1.7e20
5 W33N48
(350",637") 		W25-W43
(18) 		0.2 -0.4 -1.8e19
6 E10S21
(-147",-442") 		E13-E05
(8) 		0.2 -0.9 -3.2e19
7 W03S10
(57",-274") 		W01-W05
(4) 		0.2 -0.9 -2.4e19
8 E02S24
(-26",-486") 		9
(2.6e03) 		-0.7 3.2 8.3e19
9 W12S22
(182",-452") 		W09-W14
(5) 		0.1 -0.8 -1.7e19
10 E40S31
(-528",-561") 		E42-E38
(4) 		0.1 -2.8 -4.2e19
11 W47S48
(469",-749") 		W43-W50
(7) 		0.0 -2.2 -4.6e19
12 E14S03
(-230",-159") 		E16-E12
(4) 		0.0 -1.6 -1.0e19

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 20-Aug-2021 23:30 UT .