> ## Documentation Index
> Fetch the complete documentation index at: https://data.avert.ldeo.columbia.edu/llms.txt
> Use this file to discover all available pages before exploring further.

# Instruments

> Infrasound sensors deployed across the AVERT network

Infrasound sensors are deployed at AVERT stations co-located with other instruments such as seismometers and weather stations. They are powered by solar systems with battery backup and telemeter data in near real time.

<AccordionGroup>
  <Accordion title="Okmok">
    A pre-existing infrasound sensor at OKIF complements seismic monitoring by detecting explosive activity within the caldera. This station is part of the AVO network.
  </Accordion>

  <Accordion title="Cleveland">
    A pre-existing 5-instrument infrasound array at CLCO on Chuginadak Island, along with a single infrasound sensor at CLES, detects the frequent explosions characteristic of this open-vent volcano. Both stations are part of the AVO network.
  </Accordion>

  <Accordion title="Poas">
    New infrasound arrays were installed at VPCR (crater rim) and VPEM (south of the crater) during the 2024 and 2025 AVERT-OVSICORI field workshops. These arrays capture acoustic signals from the phreatomagmatic explosions and degassing events at the crater lake.
  </Accordion>
</AccordionGroup>