17 August 2021
⇐20210816 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210818⇒

NOAA
4 Active Regions
12857
12853
12855
12856

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 W12S08
(190",-234") 		E26-W46
(72) 		11.0 -0.0 -4.8e19
2 E49N59
(-373",767") 		E62-E64
(-2) 		1.3 0.8 3.7e20
3 E12S64
(-87",-895") 		E29-W11
(40) 		0.5 -0.8 -1.7e20
4 W13N27
(192",330") 		W06-W19
(13) 		0.3 -1.8 -9.8e19
5 W68N71
(291",874") 		W49-W79
(30) 		0.2 1.0 1.6e20
6 E46N28
(-604",380") 		E50-E42
(8) 		0.2 2.8 1.5e20
7 E01S20
(-15",-431") 		E03-W02
(5) 		0.1 0.8 1.8e19
8 E11N25
(-171",292") 		E15-E08
(7) 		0.1 -1.5 -2.3e19
9 E23N54
(-215",701") 		E27-E16
(11) 		0.1 1.7 2.8e19
10 E33S06
(-509",-190") 		E35-E30
(5) 		0.1 -0.6 -6.9e18
11 E07N27
(-103",326") 		E09-E06
(3) 		0.1 -1.1 -9.7e18
12 W11S21
(171",-443") 		W09-W12
(3) 		0.0 -2.2 -1.6e19
13 E30N53
(-282",694") 		E32-E27
(5) 		0.0 -0.6 -5.2e18

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 17-Aug-2021 23:30 UT .