19 April 2021
⇐20210418 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210420⇒

NOAA
3 Active Regions
12816
12814
12815

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 W43S55
(377",-739") 		E69-W60
(129) 		8.5 -1.0 -2.6e21
2 W07S14
(116",-150") 		E17-W30
(47) 		5.4 -0.6 -5.3e20
3 E25N03
(-403",130") 		E28-E22
(6) 		0.1 -0.8 -1.9e19
4 E31N47
(-339",748") 		E38-E26
(12) 		0.1 0.4 1.3e19
5 W08S45
(92",-612") 		W04-W11
(7) 		0.1 -0.6 -1.0e19
6 W31S05
(499",-2") 		W30-W33
(3) 		0.0 -2.1 -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 19-Apr-2021 19:30 UT .