avo.alaska.eduAlaska Volcano Observatory

Site Map | FAQ | Home About AVO Introduction Operations Response Staff Fields of Study Geology Seismology Remote Sensing Deformation Tephra Infrasound Current Volcanic Activity Summary Color Code Definitions Activity Notifications Webcams Akutan AKSD Augustine - Homer Augustine - island Augustine - Lagoon Augustine - low light Cleveland CLCO Gareloi Great Sitkin Great Sitkin -GSIG Iliamna Iliamna IVE Kanaga Kanaga - KIMD Makushin Okmok OKIF Pavlof - BLHA Pavlof - DOL Peulik Redoubt - CI Redoubt - DFR Redoubt - Hut Shishaldin Shishaldin-WTUG SpurrCKT Tanaga Wrangell Webicorders Introduction Map Akutan Augustine Cleveland Dutton Gareloi Great Sitkin Iliamna Kanaga Katmai Korovin Little Sitkin Makushin Martin Okmok Pavlof Redoubt Semisopochnoi Shishaldin Snowy Spurr Tanaga Veniaminof Westdahl RSAM Introduction Gareloi Okmok Pavlof Redoubt Semisopochnoi Shishaldin Veniaminof Great Sitkin Cleveland Semisopochnoi Shishaldin Volcano Information Volcano List Adagdak Akutan Alagogshak Amak Amchixtam Chaxsxii Amukta Andrew Bay volcano Aniakchak Atka Augustine Basalt of Gertrude Creek Behm Canal-Rudyerd Bay Black Peak Blue Mtn Bobrof Bogoslof Buldir Buzzard Creek Capital Carlisle Chagulak Chiginagak Churchill, Mt Cleveland Cone 3110 Cone 3601 Dana Davidof Denison Devils Desk Double Glacier Douglas Drum Duncan Canal Dutton Edgecumbe Emmons Lake Volcanic Center Espenberg Fisher Folsoms Bluff Fourpeaked Frosty Gareloi Gas Rocks, the Gilbert Gordon Great Sitkin Griggs Hayes Herbert Iliamna Imuruk Lake Volc Field Ingakslugwat Hills Ingenstrem Depression Volcanic Field Ingrisarak Mtn Iron Trig cone Isanotski Iskut-Unuk River cones Jarvis Jumbo Dome Kagamil Kaguyak Kanaga Kasatochi Katmai Kejulik Kialagvik Kiska Klawasi Group Knob 1000 Kochilagok Hill Koniuji Kookooligit Mountains Korovin Koyuk-Buckland volcanics Kukak Kupreanof Little Sitkin Lone basalt Lost Jim Cone Mafic Knob 500 Mageik Makushin Martin Moffett Monogenetic QT vents of WWVF Morzhovoi Nelson Island Novarupta Nunivak Island Nushkolik Mountain volcanic field Okmok Pavlof Pavlof Sister Prindle Volcano Rainbow River cone Recheshnoi Redoubt Roundtop Sanford Seguam Segula Semisopochnoi Sergief Shishaldin Skookum Creek Snowy Spurr St. George volcanic field St. Michael St. Paul Island Steller Stepovak Bay 1 Stepovak Bay 2 Stepovak Bay 3 Stepovak Bay 4 Suemez Island Table Top Mtn Takawangha Tana Tanada Peak Tanaga Tlevak Strait Togiak volcanics Trader Mtn Trident Ugashik-Peulik Ukinrek Maars Uliaga Ungulungwak Hill-Ingrichuak Hill Unimak 5270 Unnamed (near Ukinrek Maars) Veniaminof Vsevidof Westdahl Western Cones Wide Bay cone Wrangell Yantarni Yunaska About Alaska's Volcanoes Hazards from Alaska's Volcanoes Map & Alphabetical List Interactive Map Eruption Search Volcano Search Library Introduction Reference Search Glossary Images Image Search Recent Images Popular Images Browse Images Searches Introduction Reference Search Geochemistry Search Image Search Eruption Search Volcano Search Volcano Activity Notification Search Great Sitkin | Cleveland | Semisopochnoi | Shishaldin You are here: Home OTHER US OBSERVATORIES California Cascades Hawaii Yellowstone MEMBER AGENCIES The (AVO) is a joint program of the U.S. Geological Survey (USGS), the Geophysical Institute of the University of Alaska Fairbanks (UAFGI), and the State of Alaska Division of Geological and Geophysical Surveys (ADGGS). RESTLESS VOLCANOES Great Sitkin Color Code YELLOW / Alert Level ADVISORY Full details ... Cleveland Color Code YELLOW / Alert Level ADVISORY Full details ... Semisopochnoi Color Code YELLOW / Alert Level ADVISORY Full details ... Shishaldin Color Code YELLOW / Alert Level ADVISORY Full details ... LAST ACTIVITY REPORT Get these reports emailed to you: USGS VNS ALASKA VOLCANO OBSERVATORY DAILY UPDATE U.S. Geological Survey Monday, April 27, 2020, 12:36 PM AKDT (Monday, April 27, 2020, 20:36 UTC) SHISHALDIN VOLCANO (VNUM #311360) 54°45'19" N 163°58'16" W, Summit Elevation 9373 ft (2857 m) Current Volcano Alert Level: ADVISORY Current Aviation Color Code: YELLOW Unrest continues at Shishaldin with low-level seismic tremor and a steam plume was visible from the summit in clear web camera images. Satellite images of the summit were obscured by clouds. Although unrest is currently at low levels, activity could escalate with little warning, and additional eruptive activity within the summit crater, lava flows, lahars, and ash-producing eruptive events could occur. Shishaldin is monitored by local seismic and infrasound sensors, satellite data, web cameras, a telemetered geodetic network, and distant infrasound and lightning networks. SEMISOPOCHNOI VOLCANO (VNUM #311060) 51°55'44" N 179°35'52" E, Summit Elevation 2625 ft (800 m) Current Volcano Alert Level: ADVISORY Current Aviation Color Code: YELLOW Occasional periods periods of minor seismic tremor occurred over the last day. A regional infrasound array did not detect any exposive activity, and no activility was noted in partly cloudy satellite observations. Semisopochnoi is monitored by local seismic sensors, satellite data, and lightning detection networks. An infrasound array on Adak Island may detect explosive emissions from Semisopochnoi with a slight delay (approximately 13 minutes) if atmospheric conditions permit. GREAT SITKIN VOLCANO (VNUM #311120) 52°4'35" N 176°6'39" W, Summit Elevation 5709 ft (1740 m) Current Volcano Alert Level: ADVISORY Current Aviation Color Code: YELLOW Small local earthquakes have continued at Great Sitkin over the past day. No activity was observed in cloudy satellite imagery and partly cloudy web camera images. Great Sitkin volcano is monitored with a local real-time seismic network, which typically allows AVO to detect changes in unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption would be accomplished using a combination of seismic, infrasound, lightning, and satellite data. CLEVELAND VOLCANO (VNUM #311240) 52°49'20" N 169°56'42" W, Summit Elevation 5676 ft (1730 m) Current Volcano Alert Level: ADVISORY Current Aviation Color Code: YELLOW The local geophysical stations at Cleveland were unavailable over the past day due to an ongoing network outage. Satellite observations were obscured by clouds over the past day. No explosive activity was detected from the direction of Cleveland on regional infrasound arrays. Web camera views were unavailable due to the network outage. Episodes of lava effusion and explosions can occur without advance warning. Explosions from Cleveland are normally short duration and only present a hazard to aviation in the immediate vicinity of the volcano. Larger explosions that present a more widespread hazard to aviation are possible, but are less likely and occur less frequently. Cleveland volcano is monitored by only two seismic stations, which restricts AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. OTHER ALASKA VOLCANOES Information on all Alaska volcanoes is available at : http://www.avo.alaska.edu. For definitions of Aviation Color Codes and Volcano Alert Levels, see: http://www.avo.alaska.edu/color_codes.php SUBSCRIBE TO VOLCANO ALERT MESSAGES by email: http://volcanoes.usgs.gov/vns/ FOLLOW AVO ON FACEBOOK: https://facebook.com/alaska.avo FOLLOW AVO ON TWITTER: https://twitter.com/alaska_avo CONTACT INFORMATION: Michelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497 David Fee, Coordinating Scientist, UAFGI dfee1@alaska.edu (907) 322-4085 The is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys. NEWS News archives AVO Radio AVO Radio - Latest Episode Your browser does not support the audio element. RUSSIAN VOLCANO INFORMATION Kamchatka: Latest release and Webcams ...