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Ingakslugwat Hills

Volcanic field in United States

Key Facts

Elevation

190 m (623 ft)

Type

Volcanic field

Location

61.430°, -164.470°

Region

Northern Alaska-Bering Sea Volcanic Province

Rock Type

Basalt / Picro-Basalt

Tectonic Setting

Intraplate

Location

Loading map...

Overview

The Ingakslugwat Hills consist of at least 32 small cinder cones and eight larger craters covering more than 500 km2 in the Yukon-Kuskokwin delta area of SW Alaska. Numerous small spatter cones and cinder cones range from 8 to 190 m in height; many are concentrated in the NW side of the volcanic field. The latest activity was considered to have occurred during the Holocene (Moll-Stalcup, in Wood and Kienle, 1990).

One low cone containing a 400-m-wide lake may be a maar. This dominantly alkali olivine basaltic field also contains basanitic and nephelinitic rocks, some with inclusions of lherzolite and layered gabbro.

Volcanic Hazards & Risk Assessment

Primary Hazards

    Risk Level

    Population at RiskModerate
    Infrastructure RiskModerate
    Aviation RiskSignificant

    Geological Composition & Structure

    Rock Types

    Primary
    Basalt / Picro-Basalt
    Silica Content
    Low (45-52% SiO₂)

    Tectonic Setting

    Intraplate
    Continental rift or intraplate setting with varied eruptive styles.

    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: 314030
    • •Evidence: Evidence Credible
    • •Epoch: Holocene

    About the Photo

    The Ingakslugwat Hills volcanic field covers an area of more than 500 km2 and contains over 32 scoria cones and 8 larger craters, some of which are seen in this Planet Labs June 2019 satellite image monthly mosaic (N is at the top; image is approximately 40 km across).

    Satellite image courtesy of Planet Labs Inc., 2019 (https://www.planet.com/).

    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.