2 February 2021
⇐20210201 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210203⇒

NOAA
1 Active Region
12800

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 E15S20
(-232",-234") 		E29-W05
(34) 		3.3 1.9 9.9e20
2 W20N10
(333",261") 		W04-W34
(30) 		1.8 -0.0 -5.0e18
3 E38S04
(-606",21") 		E51-E23
(28) 		1.5 0.3 7.6e19
4 W39S73
(181",-901") 		E77-W84
(161) 		1.4 -1.1 -6.7e20
5 W02N31
(34",595") 		E02-W05
(7) 		0.1 -1.0 -2.9e19
6 E60S22
(-782",-321") 		E65-E55
(10) 		0.1 -0.5 -1.5e19
7 E43N11
(-652",259") 		E47-E39
(8) 		0.1 -1.0 -1.7e19
8 W31S03
(502",33") 		W29-W33
(4) 		0.1 -1.3 -1.6e19
9 W61S21
(794",-298") 		W57-W64
(7) 		0.1 -2.8 -5.0e19
10 E41S15
(-618",-174") 		E44-E39
(5) 		0.0 -1.1 -1.0e19
11 E22N07
(-368",211") 		E24-E21
(3) 		0.0 -4.0 -2.9e19
12 E02S03
(-33",55") 		E03-E01
(2) 		0.0 3.2 2.1e19
13 -21
(271",W00N10") 		2
(5.7e02) 		4.0 13.7 7.8e19

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 2-Feb-2021 20:30 UT .