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The interactive chart above displays continuous soil CO₂ measurements from the OKCE monitoring station at Okmok volcano. This data is critical for understanding volcanic activity patterns and potential eruption precursors.

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Station Information

Location: Inside the caldera, Okmok volcano, Alaska Installation Date: July/August 2021 (AVERT project) Instrumentation:
  • Vaisala CARBOCAP GMP343 probe
  • Equipped with soil probe adapter
  • Infrared light absorption measurement system
  • Temperature and humidity compensation
Data Collection:
  • Continuous CO2 concentration measurements
  • Infrared light absorption by CO2 in soil
  • Temperature-compensated measurements
  • Static compensation for humidity and pressure
Network Role:
  • Part of soil monitoring network at Okmok volcano
  • Measures diffuse CO2 degassing from soil
  • Provides additional measure of CO2 concentrations in shallow surface
  • Contributes to understanding gas emissions before atmospheric dilution
Site Characteristics:
  • Located on Umnak Island in the central Aleutian Arc
  • “Closed-system” volcano with cycles of inflation and deflation
  • Currently re-inflating since last eruption in 2008
  • Inside caldera location for direct monitoring
Data Access:
  • Soil CO2 data available through AVERT monitoring systems
  • Part of comprehensive volcanic monitoring network
  • Data used for gas emission studies
Additional Infrastructure:
  • Co-located with TEROS 12 soil moisture, temperature, and electrical conductivity sensors
  • Part of AVO permanent monitoring network
Monitoring Capabilities:
  • Diffuse CO2 degassing measurement
  • Soil gas concentration monitoring
  • Integration with other soil parameters
  • Potential precursor signal detection
  • Low-cost monitoring solution