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Griggs

Photo of this volcano
  • Country
  • Landform (Volc Type)
  • Last Known Eruption
  • 58.354°N
  • 155.092°W

  • 2317 m
    7602 ft

  • 312190
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Griggs.

The Global Volcanism Program has no Weekly Reports available for Griggs.

The Global Volcanism Program has no Bulletin Reports available for Griggs.

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.

Eruptive History

There is data available for 1 confirmed Holocene eruptive periods.

1790 BCE ± 40 years Confirmed Eruption  

Episode 1 | Eruption Episode
1790 BCE ± 40 years - Unknown Evidence from Isotopic: 14C (calibrated)

List of 2 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Ash
Deformation History

There is no Deformation History data available for Griggs.

Emission History

There is no Emissions History data available for Griggs.

Photo Gallery

Mount Griggs is the prominent stratovolcano at the upper left in this aerial view from the SW. The slopes of the volcano are heavily mantled with ash from the 1912 eruption of Novarupta volcano. The 1912 pyroclastic-fall deposits also mantle the irregular surface of Knife Creek Glacier, which flows from right to left behind the ridge in the lower right foreground.

Copyrighted photo by Katia and Maurice Krafft, 1978.
The snow-covered ridge at the right in this view from the south of Mount Griggs is the margin of a large, 1.5-km-wide breached crater formed during the early Holocene during collapse of the volcano's summit. Remnants of the resulting debris-avalanche deposit reach WSW across the valley to Broken Mountain. The young central cone on the center skyline filled the collapse amphitheater and displays nested craters.

Copyrighted photo by Katia and Maurice Krafft, 1978.
An aerial view from the east shows Mount Griggs in the foreground with the distal end of the Valley of Ten Thousand Smokes (VTTS) ash-flow deposit in the distance, forming the flat, light-colored valley floor at the upper left. The VTTS ash flow was erupted in 1912 from Novarupta volcano; it traveled 21 km to the location shown in this photo. Griggs volcano is the highest of a group of volcanoes in the Katmai area. Three concentric craters are breached to the SW, the largest of which was formed by edifice collapse during the early Holocene.

Copyrighted photo by Katia and Maurice Krafft, 1978.
Griggs is the highest of a group of volcanoes in the Katmai area, located 10 km behind the volcanic arc. Active fumaroles are within the summit crater and along the upper SW flank. Tephra from the 1912 Novarupta eruption cover the flanks in this 1990 view from the SW.

Photo by Game McGimsey, 1990 (U.S. Geological Survey, Alaska Volcano Observatory).
Griggs, seen here from the west rim of Katmai caldera, lies west of a NE-trending arc of volcanoes cutting across Katmai National Park. Noisy fumarolic jets at the summit can be heard across long distances.

Photo by Game McGimsey (Alaska Volcano Observatory, U.S. Geological Survey).
Geologists walk toward Griggs volcano from the base of Knife Creek Glacier to its south. Active fumarole fields persist in the summit crater and along the upper SW flank, and can be heard from the valley floor. The flanks of Griggs and the surface of Knife Creek Glacier have thick ash deposits from the 1912 Novarupta eruption.

Photo by Game McGimsey (Alaska Volcano Observatory, U.S. Geological Survey).
GVP Map Holdings

Maps are not currently available due to technical issues.

The maps shown below have been scanned from the GVP map archives and include the volcano on this page. Clicking on the small images will load the full 300 dpi map. Very small-scale maps (such as world maps) are not included.

Smithsonian Sample Collections Database

There are no samples for Griggs in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

External Sites