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Tana

Stratovolcano(es) in United States

Key Facts

Elevation

1,170 m (3,839 ft)

Type

Stratovolcano(es)

Location

52.830°, -169.770°

Region

Aleutian Ridge Volcanic Arc

Rock Type

Rhyolite

Tectonic Setting

Subduction zone

Location

Loading map...

Overview

The Tana volcanic complex forming the eastern half of the Chuginadak Island, opposite the conical Cleveland stratovolcano, is composed of two prominent E-W-trending volcanoes. The complex shows evidence of glacial erosion, but highly irregular coastlines forming peninsulas west of Applegate Cove on the NW side of the complex and Concord Point on the south side imply lava flows of mid- to late-Holocene age (Nye 2007, pers. comm.

). Prominent lava flow levees are visible near Concord Point, where a low-silica rhyolite sample was obtained. The undissected cone and youthful crater forming the western summit also imply a post-glacial age, and youthful cinder cones also lie east of the isthmus between Cleveland and Tana volcanoes.

Volcanic Hazards & Risk Assessment

Primary Hazards

    Risk Level

    Population at RiskModerate
    Infrastructure RiskModerate
    Aviation RiskSignificant

    Geological Composition & Structure

    Rock Types

    Primary
    Rhyolite
    Silica Content
    High (>68% SiO₂)

    Tectonic Setting

    Subduction zone
    Formed by oceanic plate subduction, typically producing explosive eruptions due to water-rich magmas.

    Age & Formation

    Epoch
    Holocene
    Evidence
    Evidence Credible

    Eruption Statistics & Analysis

    MetricValueGlobal RankingSignificance
    Total Recorded EruptionsUnknownLowModerately active volcano
    Maximum VEIVEI UnknownMinorLocal impact potential
    Recent ActivityUnknownHistoricalHistorically active

    Monitoring & Alert Status

    Monitoring Networks

    Global Volcanism Program
    International eruption database

    Current Status

    Normal
    No recent activity. Routine monitoring continues.

    Nearby Volcanoes in North America Volcanic Regions

    Regional Volcanic Activity
    The North America Volcanic Regions contains multiple active volcanic systems. Cross-regional magma interactions and tectonic stresses can influence eruption patterns across the entire arc. Monitor regional seismic activity and volcanic alerts.

    Quick Info

    • •Smithsonian ID: 311241
    • •Evidence: Evidence Credible
    • •Epoch: Holocene

    About the Photo

    The Tana volcanic complex in the center of this NASA International Space Station image forms the eastern half of Chuginadak Island, across from Cleveland visible to the upper left. A young cone and crater form the western summit.

    NASA International Space Station image ISS001-E-5957, 2001 (http://eol.jsc.nasa.gov/).

    Authority Sources

    Smithsonian GVP
    Official volcano database
    USGS Volcano Hazards
    U.S. Geological Survey
    Global Volcanism Program
    Smithsonian Institution

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    Basic Information

    This page shows basic data from the Smithsonian Global Volcanism Program. For more detailed information, visit the official Smithsonian page.