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Location: North-west rim of the summit crater, Poás volcano, Costa Rica
Installation Date: November 2023 (AVERT project)
Instrumentation:
- Trillium Compact 120 s posthole analogue seismometer
- 24-bit Centaur digitiser (Nanometrics Incorporated)
- Direct burial method at ~1 m depth
- Aligned with true north using compass compensated for magnetic declination
Data Collection:
- Continuous broadband seismic data
- High sensitivity for detecting micro-earthquakes
- Part of permanent monitoring network
Network Role:
- Part of the new seismic network at Poás volcano
- Helps constrain shallower activity in the vicinity of main vents
- Located on crater rim to monitor tremor/explosions from summit vents
- Contributes to comprehensive monitoring of the northern flank
Site Characteristics:
- Located north of San José, Costa Rica
- Large basaltic-andesitic stratovolcano
- Features hot, acidic crater lake and shallow hydrothermal system
- Popular tourist destination and National Park
Data Access:
Additional Infrastructure:
- Co-located with 3-component fluxgate magnetometer
- Co-located with GNSS antenna
- Part of AVERT network with radio telemetry
Monitoring Capabilities:
- Detection of volcano-tectonic earthquakes
- Long-period event monitoring
- Tremor detection and analysis
- Explosion monitoring from summit vents
- Integration with magnetic and deformation monitoring
