21 February 2021
⇐20210220 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210222⇒

NOAA
2 Active Regions
12803
12802

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 W47S65
(295",-842") 		E84-W67
(151) 		3.1 -1.0 -1.2e21
2 W42S28
(576",-373") 		W20-W59
(39) 		2.4 -3.5 -1.8e21
3 E17N10
(-284",287") 		E28-E05
(23) 		1.6 0.0 9.7e18
4 E36N63
(-254",904") 		E64-W04
(68) 		0.9 0.6 3.3e20
5 E13S34
(-178",-436") 		E17-E09
(8) 		0.1 6.8 1.6e20
6 W21N69
(125",939") 		W12-W38
(26) 		0.1 1.6 9.7e19
7 W27N01
(444",117") 		W24-W30
(6) 		0.1 -1.3 -1.3e19

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 21-Feb-2021 20:30 UT .