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Location: Southern flank of Cleveland volcano, Alaska
Installation Date: September 2022 (AVERT project)
Instrumentation:
- Bartington Instruments Mag-13 three-axis fluxgate magnetometer
- Bartington portable power supply unit (PSU1)
- 24-bit Nanometrics Centaur digitizer
- Shallow direct burial deployment
Data Collection:
- Continuous 3-component magnetic field measurements
- Sensitive to signals with periods of 10 s or lower
- Primarily useful for detecting long-term changes in local magnetic field
- Temperature-sensitive measurements requiring correction
Network Role:
- One of two fluxgate magnetometers at Cleveland volcano
- Only continuous and telemetered magnetometers in the Aleutians
- Provides unique magnetic monitoring capability for volcanic systems
Site Characteristics:
- Located on the Islands of Four Mountains in the central Aleutian Arc
- “Open-vent” volcano with persistent gas plume
- Deployed as far from power infrastructure as possible to minimize electromagnetic contamination
- Exposed to environmental temperature changes
Data Access:
Additional Infrastructure:
- Co-located with broadband seismometer
- Co-located with GNSS antenna
- Part of AVERT monitoring network
Data Characteristics:
- Total field dominated by vertical component
- Temperature sensitivity visible as sinusoidal fluctuations over the year
- High amplitude departures typically due to geomagnetic storms
- More stable during winter months due to snow insulation
