Skip to main content
← Back to map
⇄ Compare

Koryaksky

Stratovolcano · Russia · 3430m

Koryaksky is the part of the NW-trending Avachinskaya volcano group near Kamchatka's largest city, Petropavlovsk. This view from below the saddle between Avachinsky and Koryaksky volcanoes shows the eroded SE flank. The youngest lava flows are on the upper W flank and below SE-flank scoria cones. Moderate explosive eruptions have occurred since the first historical eruption in 1895.
Koryaksky is the part of the NW-trending Avachinskaya volcano group near Kamchatka's largest city, Petropavlovsk. This view from below the saddle between Avachinsky and Koryaksky volcanoes shows the eroded SE flank. The youngest lava flows are on the upper W flank and below SE-flank scoria cones. Moderate explosive eruptions have occurred since the first historical eruption in 1895. · Photo: Photo by Andrei Tsvetkov. · Wikimedia Commons
Type
Stratovolcano
Country
Russia
Region
Northwestern Pacific Volcanic Regions / Eastern Kamchatka Volcanic Arc
Elevation
3430m
Coordinates
53.321, 158.712
Last eruption
2009
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Composite
Major rock type
Andesite / Basaltic Andesite
Geological summary

The large symmetrical Koryaksky stratovolcano is the most prominent landmark of the NW-trending Avachinskaya volcano group, which towers above Kamchatka's largest city, Petropavlovsk. Erosion has produced a ribbed surface on the eastern flanks of the 3430-m-high volcano; the youngest lava flows are found on the upper W flank and below SE-flank cinder cones. Extensive Holocene lava fields on the western flank were primarily fed by summit vents; those on the SW flank originated from flank vents. Lahars associated with a period of lava effusion from south- and SW-flank fissure vents about 3900-3500 years ago reached Avacha Bay. Only a few moderate explosive eruptions have occurred during historical time, but no strong explosive eruptions have been documented during the Holocene. Koryaksky's first historical eruption, in 1895, also produced a lava flow.

From Wikipedia

Koryaksky or Koryakskaya Sopka is an active volcano on the Kamchatka Peninsula in the Russian Far East. It lies within sight of Kamchatka Krai's administrative center, Petropavlovsk-Kamchatsky. Together with neighbouring Avachinsky, it is considered a Decade Volcano, worthy of particular study in light of its history of explosive eruptions and proximity to populated areas.

Wikipedia · CC BY-SA · Read full article →

Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
5050 BCE~4815 BCE · 1 eruptions · max VEI ?1992 BCE~1756 BCE · 1 eruptions · max VEI ?1756 BCE~1521 BCE · 1 eruptions · max VEI ?1773~2008 · 4 eruptions · max VEI 35050 BCE3403 BCE1521 BCE1261773

Detailed timeline

  1. 2008VEI 2Observed
    2008-12-23 – 2009-08-27
    Upper NW flank (3000 m)
  2. 1956VEI 3Observed
    1956-12-16 – 1957-06-16
    Summit and upper NW flank (3000 m)
  3. 1926VEI 1Observed
    1926-12-22 – 1926-12-22
  4. 1890 (±3 yrs)VEI 1Observed
    1890 – Ongoing
    Upper SW flank
  5. 1550 BCEVEI ?Geological estimate
    BCE 1550 – Ongoing
    South and SW flanks
  6. 1950 BCE (±300 yrs)VEI ?Geological estimate
    BCE 1950 – Ongoing
    South and SW flanks
  7. 5050 BCEVEI ?Geological estimate
    BCE 5050 – Ongoing

External links

⚠ For reference only. Not for emergency response.