Santorini, a shield volcano located in Greece within a subduction zone setting and a continental crust thicker than 25 kilometers, has an official record of 11 confirmed eruptions spanning from antiquity through the 20th century. According to the Smithsonian Global Volcanism Program, the volcano reaches an elevation of 367 meters, and its recorded activity includes events ranging from prehistoric caldera-forming eruptions to historical dome-building phases.
Overview of Recorded Eruptions
The documented eruption history at Santorini comprises 11 confirmed events captured in the official record. These events span multiple centuries, beginning with a major event in the 17th century BCE and concluding with the latest recorded activity starting on January 10, 1950.
The recorded eruptions vary significantly in scale, measured using the Volcanic Explosivity Index (VEI). The largest recorded event in the official dataset reached a VEI of 7.0, occurring around 1610 BCE with a start year uncertainty of 14 years, determined via calibrated radiogenic carbon-14 isotopic evidence. Subsequent historical eruptions documented through direct human observations feature lower VEI ratings, typically ranging between 2 and 3, often centered around specific activity areas such as Thia Island and various domes within Nea Kameni.
Chronological Distribution of Activity
Historical records indicate intermittent eruptive periods across several centuries. The distribution of confirmed eruptions by century highlights active phases separated by long quiet intervals:
- 17th century BCE: 1 confirmed eruption (VEI 7.0)
- 2nd century BCE: 1 confirmed eruption
- 1st century CE: 1 confirmed eruption (including activity on Thia Island ending February 1, 0047 CE)
- 8th century CE: 1 confirmed eruption
- 16th century CE: 1 confirmed eruption
- 18th century CE: 1 confirmed eruption (such as the activity spanning from May 23, 1707 to September 14, 1711 at Nea Kameni)
- 19th century CE: 1 confirmed eruption
- 20th century CE: 4 confirmed eruptions, including the Naftilos dome eruption in 1928 and the Liatsikas dome eruption that began on January 10, 1950, and ended on February 2, 1950.
Evidence Methods and Record Limitations
The documentation methods for Santorini's eruptions shift from scientific estimation to direct human observation over time. The earliest event relies on isotopic analysis (calibrated 14C), reflecting prehistoric timing estimates with associated uncertainties. All subsequent recorded eruptions in the official collection rely on reported historical observations. None of the recorded eruption records are marked as continuing; the latest recorded eruption concluded on February 2, 1950.
Frequently asked questions
When was the earliest recorded eruption at Santorini?
The earliest recorded eruption in the official Smithsonian Global Volcanism Program record for Santorini occurred around 1610 BCE, with an uncertainty of 14 years.
When was the most recent eruption at Santorini?
The latest recorded eruption began on January 10, 1950, and ended on February 2, 1950.
How many eruptions are officially recorded for Santorini?
The Smithsonian Global Volcanism Program lists 11 confirmed eruptions for Santorini.
What is the largest recorded VEI for Santorini?
The largest recorded eruption in the official record reached a Volcanic Explosivity Index (VEI) of 7.0.
Image credits
- dronepicr — Wikimedia Commons source — CC BY 2.0
Sources and further context
Official datasets support the event-specific facts.