Coronal holes are large regions in the corona that are less dense and cooler than surrounding areas. The open structure of their magnetic field allows a constant flow of high-density plasma to stream out of the holes. There is an increase in the intensity of the solar wind effects on Earth when a coronal hole faces us.
<AUR>.Sunspots
| Regions with Sunspots | |||
| Region | # of Spots | Mag Type | |
| None | |||
| H-alpha Plages without Spots | |||
| Region | |||
| 2739 | |||
| Regions Due to Return 22 Apr to 24 Apr | |||
| Region | |||
| None | |||
<AUR>.Alert
<AUR>.Alert.Subscriberlast message issued over 12hrs ago
Space Weather Message Code: ALTTP2
Serial Number: 1073
Issue Time: 2019 Apr 22 0424 UTC
ALERT: Type II Radio Emission
Begin Time: 2019 Apr 22 0255 UTC
Estimated Velocity: 428 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.
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<AUR>.DX-Cluster Statistics
Knowledge Database
Source: http://www.noaa.gov
