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Entry: Yellow - showing version 4

stable

URI: http://codes.wmo.int/49-2/AviationColourCode/YELLOW    

Volcano is experiencing signs of elevated unrest above known background levels. Or, after a change from higher alert level: Volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.

Core metadata

is a Concept
changed on 19 Nov 2025 09:58:04.149
submitted bymarq h
accepted on 30 Dec 2016 13:27:16.899

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date accepted 30 Dec 2016 13:27:16.899
date submitted 30 Dec 2016 13:26:16.232
definition
entity Yellow
source graph graph

description Volcano is experiencing signs of elevated unrest above known background levels. Or, after a change from higher alert level: Volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.
item class Concept
label Yellow
modified 19 Nov 2025 09:58:04.149
notation YELLOW
register aviation colour code
status status stable
submitter
account name https://plus.google.com/100578379482821123729
name marq h

type register item
version info 4
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Definition

description Volcano is experiencing signs of elevated unrest above known background levels. Or, after a change from higher alert level: Volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.
label Yellow
notation YELLOW
type Concept
version info 2023 1 | 2021 2 | 3.0 | 2.1