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  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 62°N
  • 144.02°W

  • 4317 m
    14160 ft

  • 315020
  • Latitude
  • Longitude

  • Summit

  • Volcano

There are no activity reports for Wrangell.

 Available Weekly Reports

There are no Weekly Reports available for Wrangell.

Summary of eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
2002 Aug 1 2002 Aug 2 Confirmed 1 Historical Observations
1999 May 14 1999 May 14 Confirmed 1 Historical Observations
1969 Aug Unknown Confirmed 1 Historical Observations West Crater
[ 1930 Jun 30 ] [ Unknown ] Uncertain    
[ 1921 Jul 3 ] [ 1921 Jul 3 ] Uncertain     North flank?
1911 Apr 14 1912 Sep 14 (?) Confirmed 1 Historical Observations
[ 1907 Apr 1 (in or before) ] [ Unknown ] Uncertain    
1902 Jul 15 ± 45 days Unknown Confirmed 2 Historical Observations West Crater
1900 Jun (in or before) Unknown Confirmed 2 Historical Observations
1899 Sep 3 Unknown Confirmed 2 Historical Observations
[ 1884 Oct 26 ] [ 1885 Feb 4 ] Uncertain 2  
[ 1819 ] [ Unknown ] Uncertain 2  
[ 1784 Jul ] [ Unknown ] Uncertain 2  
0190 ± 200 years Unknown Confirmed 4 Radiocarbon (uncorrected)

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Benson C S, Motyka R J, 1979. Glacier - volcano interactions on Mt. Wrangell, Alaska. Univ Alaska Geophys Inst Ann Rpt, 1977-78: 1-25.

Decker R W, 1971. Table of Active Volcanoes of the World. Unpublished 41 page table, compiled primarily from IAVCEI catalogs with revisions by many volcanologists.

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..

Miller T P, McGimsey R G, Richter D H, Riehle J R, Nye C J, Yount M E, Dumoulin J A, 1998. Catalogue of the historically active volcanoes of Alaska. U S Geol Surv Open-File Rpt, 98-582: 1-104.

Newhall C G, Dzurisin D, 1988. Historical unrest at large calderas of the world. U S Geol Surv Bull, 1855: 1108 p, 2 vol.

Richter D H, Rosenkrans D S, Steigerwald M J, 1995. Guide to the volcanoes of the western Wrangell Mountains, Alaska--Wrangell-St. Elias National Park and Preserve. U S Geol Surv Bull, 2072: 1-31.

Waythomas C F, Wallace K L, 2002. Flank collapse at Mount Wrangell, Alaska, recorded by volcanic mass-flow deposits in the Copper River lowland. Can J Earth Sci, 39: 1257-1279.

Winkler G R, 2000. A geologic guide to Wrangell--Saint Elias National Park and Preserve, Alaska. U S Geol Surv Prof Pap, 1616: 1-166.

Wood C A, Kienle J (eds), 1990. Volcanoes of North America. Cambridge, England: Cambridge Univ Press, 354 p.

With a diameter of 30 km at 2000 m elevation, 900 cu km Mount Wrangell is one of the world's largest continental-margin volcanoes. The massive andesitic shield volcano has produced fluid lava flows as long as 58 km and contains an ice-filled 4-6 km diameter caldera located within a 15-km-wide ancestral caldera. Most of he massive shield volcano was constructed during eruptions between about 600,000 and 200,000 years ago. Formation of the summit caldera followed sometime between about 200,000 and 50,000 years ago. Three post-caldera craters are located at the broad 4317-m-high summit of the volcano, along the northern and western rims of the 1-km-deep, ice-filled caldera. A steep-sided flank cinder cone, Mount Zanetti, is located 6 km NW of the summit. The westernmost cone has been the source of infrequent historical eruptions beginning in the 18th century. Increased heat flux in recent years has melted large volumes of ice in the northern crater.