Purace is a stratovolcano located in Colombia, standing at an elevation of 4,650 meters within a subduction zone and continental crust tectonic setting. Maintained by the Smithsonian Global Volcanism Program, the official record documents 29 confirmed eruptions spanning from antiquity through the 21st century. These eruptive events vary in size, with recorded Volcanic Explosivity Index (VEI) values reaching up to 3.0.
Chronology and Distribution of Eruptions
The historical record for Purace captures activity across multiple centuries, utilizing different evidence methods ranging from uncalibrated radiocarbon dating for ancient events to direct human-reported observations for more recent centuries. The earliest recorded eruption in the official database dates back to 160 BCE with an estimated start year uncertainty of 50 years, determined via isotopic 14C methods.
Subsequent centuries show varying frequencies of confirmed activity:
- 2nd century BCE: 1 confirmed eruption
- 19th century CE: 12 confirmed eruptions
- 20th century CE: 12 confirmed eruptions
- 21st century CE: 4 confirmed eruptions
Notable Historical Eruptions
While the database documents 29 confirmed eruptions in total, representative examples illustrate how documentation methods shifted over time from scientific dating to direct observation:
- 160 BCE: An early confirmed eruption identified through uncalibrated 14C isotopic evidence.
- 1869 (October 4 to November 16): A reported eruption with a recorded VEI of 3.0.
- 1885 (Starting May 25): A reported eruption reaching a VEI of 3.0.
- 1906 (Starting July 2): A reported eruption with a recorded VEI of 2.0.
- 2025–2026 (November 23, 2025, to March 16, 2026): A confirmed eruption with a recorded VEI of 2.0, representing the latest structured eruption period in the database.
Out of the 29 total confirmed eruptions, 27 have accompanying VEI observations. The largest recorded VEI in the official dataset is 3.0. According to the structural profile data, the latest recorded eruption start began on November 23, 2025, concluding on March 16, 2026, while the overall profile notes a last-known eruption year of 2026 as retrieved in September 2026.
Sources and further context
Official datasets support the event-specific facts.