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Davidof: Color Code UNASSIGNED Alert Level UNASSIGNED
Local time: May 24, 2022 1750 AKDT (May 25, 2022 0150 UTC)
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COLOR CODE TIMELINE

CODE DEFINITIONS
UNASSIGNED:
UNASSIGNED:
More information on color/alert definitions

AVO monitors seismic activity at potentially active volcanoes across Alaska and calculates locations and magnitudes for earthquakes (typically magnitude 3.0 and below) near the 32 active volcanoes where AVO operates seismic networks.

A geophysicist reviews each location and magnitude before it is released, therefore AVO’s locations may not be available for up to 2 or 3 days after the event, although larger earthquakes can be processed sooner.

Other organizations such as the Alaska Earthquake Center (AEC) at the University of Alaska Fairbanks Geophysical Institute (UAF/GI) and the USGS National Earthquake Information Center (NEIC) also locate the larger (magnitude >2.5) earthquakes.Because each organization uses slightly different techniques to calculate locations and magnitudes, the initial published locations and magnitudes may differ slightly for the same earthquake. The Advanced National Seismic System (ANSS) coordinates earthquake information from these organizations and keeps the Comprehensive Earthquake Catalog, a publicly available archive with detailed and complete information on all located earthquakes nation-wide: earthquake.usgs.gov/data/comcat/

DAVIDOF UPDATES
UNASSIGNED/UNASSIGNED 04-22-2022 13:56 - Weekly Update
UNASSIGNED/UNASSIGNED 04-21-2022 17:02 - VAN/VONA
YELLOW/ADVISORY 04-21-2022 16:59 - VONA
YELLOW/ADVISORY 04-21-2022 10:53 - Daily Update
YELLOW/ADVISORY 04-20-2022 12:29 - Daily Update
YELLOW/ADVISORY 04-19-2022 11:58 - Daily Update
YELLOW/ADVISORY 04-18-2022 13:49 - Daily Update
YELLOW/ADVISORY 04-17-2022 11:21 - Daily Update

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

SELECTED IMAGES
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GeoEye-1 satellite image, 2020, annotated by M Loewen, USGS
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Combined topography and bathymetry hillshade; M Loewen USGS
View all images of this event
LINKS
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URL: www.avo.alaska.edu/activity/davidof.php
Page modified: January 27, 2022 09:36
Contact Information: AVO Web Team

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