23 April 2021
⇐20210422 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210424⇒

NOAA
3 Active Regions
12816
12817
12818

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 E06N04
(-93",149") 		E30-W23
(53) 		4.6 -0.1 -3.6e19
2 E05N55
(-48",826") 		E54-W34
(88) 		3.7 0.5 5.6e20
3 E42S68
(-243",-857") 		E60-E18
(42) 		0.6 -1.2 -2.8e20
4 W53S16
(729",-218") 		W47-W56
(9) 		0.2 -1.3 -5.3e19
5 E35N14
(-527",302") 		E39-E31
(8) 		0.1 -0.6 -1.2e19
6 E48S03
(-709",11") 		E50-E45
(5) 		0.1 1.5 3.1e19
7 W60S09
(819",-111") 		W56-W63
(7) 		0.1 -1.7 -4.1e19
8 W35N05
(551",146") 		W32-W39
(7) 		0.1 0.5 7.5e18
9 W41S81
(94",-931") 		W48-W73
(25) 		0.1 -1.0 -4.9e19
10 E24S56
(-217",-750") 		E29-E17
(12) 		0.0 -0.7 -7.2e18

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 23-Apr-2021 23:30 UT .