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Trident: Color Code GREEN Alert Level NORMAL
Local time: December 01, 2022 1520 AKST (December 02, 2022 0020 UTC)




GREEN: 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.
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.
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/

GREEN/NORMAL 10-21-2022 13:54 - Weekly Update
GREEN/NORMAL 10-20-2022 10:50 - Daily Update
GREEN/NORMAL 10-19-2022 14:06 - VONA
YELLOW/ADVISORY 10-19-2022 11:32 - Daily Update
YELLOW/ADVISORY 10-18-2022 11:44 - Daily Update
YELLOW/ADVISORY 10-17-2022 11:24 - Daily Update
YELLOW/ADVISORY 10-16-2022 10:58 - Daily Update
YELLOW/ADVISORY 10-15-2022 12:11 - Daily Update

All Trident Reports

Color Code and Alert Level Definitions

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Trident seismicity Aug 1 - Sept 13, 2022
North view of Trident Volcano. Mt. Griggs can be seen in the background. October, 1991
The multiple peaks of Trident Volcano as viewed from the top of Baked Mountain in the Valley of Ten Thousand Smokes, Alaska. Trident Volcano is composed of a cluster of andesite and dacite cones and is the only Katmai group volcano other than Katmai and Novarupta to have had historical activity. The Novarupta lava dome is visible at bottom, center. Photograph by R. McGimsey, U.S. Geological Survey, July 12, 1990.
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URL: www.avo.alaska.edu/activity/Trident.php
Page modified: September 13, 2022 22:06
Contact Information: AVO Web Team

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