18 May 2019
⇐20190517 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190519⇒

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 W06S15
(101",-202") 		E36-W32
(68) 		10.7 -0.3 -6.4e20
2 W16S68
(99",-864") 		92
(4.6e05) 		-1.1 5.4 2.5e22
3 E34N65
(-222",875") 		E63-E03
(60) 		0.9 0.7 2.1e21
4 W46N68
(255",889") 		E03-W68
(71) 		0.6 0.7 2.9e21
5 W36S31
(482",-462") 		W30-W41
(11) 		0.1 -0.6 -4.1e19
6 W30N09
(470",186") 		W28-W32
(4) 		0.1 -0.7 -1.5e19

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 18-May-2019 22:00 UT .