20 April 2019
⇐20190419 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190421⇒

NOAA
2 Active Regions
12738
12739

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 E12S26
(-178",-336") 		E35-W24
(59) 		13.0 -0.4 -1.4e21
2 E13S70
(-72",-865") 		E83-W61
(144) 		2.4 -1.1 -4.4e21
3 E26N63
(-191",885") 		E64-W09
(73) 		1.0 0.7 2.0e21
4 E06N24
(-88",469") 		E09-E03
(6) 		0.2 -0.7 -3.3e19
5 E34S30
(-468",-418") 		E38-E32
(6) 		0.1 -1.6 -4.5e19

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 20-Apr-2019 22:00 UT .