OKCE

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.

​

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