28 March 2021
⇐20210327 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210329⇒

NOAA
3 Active Regions
12812
12810
12811

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 E31N04
(-490",163") 		E54-W07
(61) 		7.6 0.3 4.6e20
2 E19S72
(-97",-877") 		E76-W77
(153) 		1.7 -1.8 -1.2e21
3 W26S03
(420",54") 		W14-W34
(20) 		1.4 -0.0 -1.2e19
4 W25N66
(160",916") 		E14-W47
(61) 		0.6 0.6 2.2e20
5 E23N23
(-347",469") 		E31-E16
(15) 		0.3 -0.6 -3.7e19
6 W30S33
(407",-433") 		W24-W36
(12) 		0.2 -1.9 -8.5e19
7 W48S20
(676",-259") 		W43-W55
(12) 		0.2 -1.7 -8.9e19
8 W13S38
(168",-505") 		W08-W17
(9) 		0.2 -1.4 -4.8e19

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 28-Mar-2021 23:30 UT .