Please select whether you want to allow a website analysis. This helps to improve our offer. This cookie is set by the website operator to store your cookie options. This cookie is used for an anonymous traffic analysis on our website. All topics Natural hazards.
Natural hazards Volcanic eruption Volcanic Alert Systems All over the world, Volcano Alert Level Systems are used to provide warnings and emergency information in relation to volcanic unrest and eruptive activity, typically based upon forecasts arising from observation, monitoring and data analysis.
Illustration: USGS. Christina Bonanati. Related Articles. Essential Cookies This cookie is set by the website operator to store your cookie options. The alert levels are used to guide any appropriate response. Minor Eruption. Major Unrest. For more information, see www. You need JavaScript enabled to view it. Version 2. There is No Current Warning. Geohazards Network Volcano Earthquake Tsunami. Username Password Remember Me Forgot your password?
Forgot your username? Additional information on the alert-notification system can be found in the Fact Sheet U. The USGS alert-level system for volcanic activity has two parts — 1 ranked terms to inform people on the ground about a volcano's status and 2 ranked colors to inform the aviation sector about airborne ash hazards. Skip to main content. Search Search. Volcano Hazards Program.
Volcanic alert-levels characterize conditions at U. NORMAL Volcano is in typical background, noneruptive state or, after a change from a higher level, volcanic activity has ceased and volcano has returned to noneruptive background state.
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