31 March 2021
⇐20210330 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210401⇒

NOAA
2 Active Regions
12811
12812

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 E00N09
(-3",260") 		E38-W43
(81) 		13.6 0.3 5.7e20
2 W42S72
(202",-881") 		E07-W86
(93) 		1.1 -1.5 -7.5e20
3 E34S25
(-492",-317") 		E47-E26
(21) 		0.7 1.6 2.1e20
4 W29N66
(187",912") 		W05-W47
(42) 		0.4 0.7 1.9e20
5 W20S08
(319",-26") 		W18-W21
(3) 		0.0 -1.9 -1.3e19
6 W33S08
(522",-40") 		W32-W35
(3) 		0.0 -2.8 -2.0e19

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 31-Mar-2021 19:30 UT .