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Semisopochnoi: Color Code UNASSIGNED Alert Level UNASSIGNED
Local time: July 02, 2016 0040 AKDT (July 02, 2016 0840 UTC)
SEMISOPOCHNOI LINKS

SAMPLES

OTHER LINKS

COLOR CODE TIMELINE

CODE DEFINITIONS
UNASSIGNED:
UNASSIGNED:
More information on color/alert definitions
LOCATION
SEMISOPOCHNOI UPDATES
UNASSIGNED/UNASSIGNED 2015-05-28 21:52:17 - VAN/VONA
YELLOW/ADVISORY 2015-05-28 19:57:06 - Daily Update
YELLOW/ADVISORY 2015-05-27 20:47:47 - Daily Update
YELLOW/ADVISORY 2015-05-26 20:04:56 - Daily Update
YELLOW/ADVISORY 2015-05-25 19:40:45 - Daily Update
YELLOW/ADVISORY 2015-05-24 19:02:49 - Daily Update
YELLOW/ADVISORY 2015-05-23 19:35:58 - Daily Update
YELLOW/ADVISORY 2015-05-22 21:30:35 - Weekly Update

All Semisopochnoi Reports

Color Code and Alert Level Definitions

ASHFALL AND ASH CLOUD FORECASTS: MODEL OUTPUT
Mathematical models developed by the USGS, UAF, and NOAA forecast various aspects of how a volcanic ash plume will interact with wind—where, how high, and how fast ash particles will be transported in the atmosphere, as well as where ash will fall out and accumulate on the ground. AVO runs these models when a volcano is restless by assuming a reasonable hypothetical eruption, in order to provide a pre-eruptive forecast of areas likely to be affected. During an ongoing eruption, AVO will update the forecast with actual observations (eruption start time and duration, plume height) as they become available. All models use the same input parameters so they are comparable. Click on individual graphics to learn more.
ASHFALL FORECASTS
ASHFALL FORECAST

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REPORTED ASHFALL

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ASH CLOUD FORECASTS (AIRBORNE):
ASH3D CLOUD HEIGHT

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ASH3D CLOUD LOAD

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PUFF CLOUD HEIGHT

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TRAJECTORY FORECASTS:
HYSPLIT TRAJECTORY

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THESE PRODUCTS MAY NOT BE CURRENT.
During an actual eruption, see National Weather Service forecasts of airborne ash hazard to aircraft (SIGMETS: http://aawu.arh.noaa.gov and Volcanic Ash Advisories: http://vaac.arh.noaa.gov) as well as forecasts of ash fall: http://pafc.arh.noaa.gov.
INSTRUMENT DATA

SELECTED IMAGES
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Semisopochnoi index map
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Satellite image of Semisopochnoi, Jan 30 2015
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LINKS
Contact AVO Privacy Accessibility Information Quality FOIA
URL: www.avo.alaska.edu/activity/Semisopochnoi.php
Page modified: September 24, 2015 15:13
Contact Information: AVO Web Team

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