19 May 2019
⇐20190518 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190520⇒

NOAA
1 Active Region
12741

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 E19N17
(-302",307") 		E30-W12
(42) 		2.9 -0.4 -3.2e20
2 E21S31
(-294",-458") 		E30-E01
(29) 		2.6 -0.3 -3.0e20
3 W23S15
(360",-208") 		W12-W35
(23) 		2.3 -0.5 -2.9e20
4 W08S37
(108",-549") 		E16-W33
(49) 		2.1 -0.3 -2.1e20
5 W33S68
(192",-868") 		E57-W66
(123) 		2.0 -1.0 -5.1e21
6 E15N66
(-96",883") 		E64-W63
(127) 		1.5 1.0 3.6e21
7 E51S66
(-304",-853") 		E77-E41
(36) 		0.5 -0.6 -9.1e20
8 W30S38
(378",-559") 		W29-W34
(5) 		0.1 -0.7 -3.5e19
9 W39N17
(579",301") 		W36-W43
(7) 		0.1 -1.0 -4.2e19
10 E36S31
(-475",-469") 		E38-E32
(6) 		0.0 -1.7 -4.0e19

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 19-May-2019 22:00 UT .