Ebeko (Russia): Recorded Eruptions and Historical Activity

Ebeko is a stratovolcano located in Russia, standing at an elevation of 1,103 meters within a subduction zone and continental crust tectonic setting. According to records from the Smithsonian Global Volcanism Program, the volcano has a confirmed history of 20 eruptions spanning from antiquity to the 21st century. The official record establishes an earliest recorded eruption year of 390 BCE, which carries a start year uncertainty of 75 years and relies on uncalibrated radiocarbon isotopic evidence.

Overview of Eruptive Activity

The historical record for Ebeko encompasses 20 confirmed eruptions with varying levels of intensity, as measured by the Volcanic Explosivity Index (VEI). Out of these events, 16 have recorded VEI observations, with the largest recorded VEI reaching 2.0. Eruptions have occasionally been localized to specific features, such as the northern crater, which was noted in records from the mid-to-late 20th century.

Chronological Distribution of Eruptions

Volcanic activity at Ebeko has been documented across multiple centuries, ranging from ancient radiocarbon-dated events to modern reported observations. The distribution of confirmed eruptions across centuries includes:

• 4th century BCE: 1 eruption
• 16th century CE: 1 eruption
• 17th century CE: 2 eruptions
• 18th century CE: 1 eruption
• 19th century CE: 2 eruptions
• 20th century CE: 8 eruptions
• 21st century CE: 5 eruptions

Earlier periods rely heavily on isotopic methods, while more recent centuries benefit from direct human observation. For instance, a confirmed eruption began on December 31, 1833, with a VEI of 2.0. In the 20th century, events such as the northern crater eruption spanning from January 16, 1967, to April 16, 1967, and another starting on January 16, 1991, were documented via reported observations with a VEI of 1.0.

Recent Activity and Latest Records

Activity in the 21st century includes a confirmed eruption that began on June 11, 2022, with a VEI of 2.0 and an end date recorded as December 31, 2024. The structured profile notes the latest known eruption year for the volcano as 2024, while individual confirmed eruption logs capture events scaling across multiple centuries.