What happens when the best class-A accelerometer in the world meets the world’s most popular seismometer?Cascadia Compact image

The Cascadia Compact, formerly the Trillium Cascadia, combines the proven Trillium Compact Posthole with the Class A Titan Posthole in a single posthole instrument. This dual output sensor measures both strong motion and weak motion, with absolutely no compromise in performance. With one hole to dig, a single connector, a single cable and sensor that are guaranteed to be mutually aligned, proper deployment is virtually effortless.

Don’t let your data be limited by your instrumentation

The Cascadia maximizes the scientific return on your investment by providing the richest possible data catalog to facilitate local and teleseismic studies. While you are monitoring for strong motion events, your instruments provide a valuable source of weak motion data that helps calibrate and train event detection algorithms, as well as benefit the broader seismology community.

A highly integrated station solution

The Cascadia series is optimized for use with our popular Centaur digital recorder. When used with the Centaur Digital Recorder, real-time tilt and azimuth correction feature permits the digitizer to correct for any tilt and misalignment at the source, eliminating the need for correction downstream. The Centaur allows for easy configuration of both sensors via the Centaur’s web interface. You’ll have full access to extended state-of-health data, including sensor inclinations, temperature and more. A digital leveling bubble in the Centaur GUI makes for easy leveling down a dark hole and gives you the ability to check levelness at any time once the instrument is buried.

Use Cases

  • Earthquake Early Warning
  • Structural Monitoring
  • Volcano Monitoring
  • Local/Regional Monitoring and Modelling
  • Aftershock Monitoring
  • Induced Seismicity Monitoring


  • Highly portable, easy to install, no vault required
  • Will never go off scale
  • Ideally suited for applications where the amplitude range is unpredictable
  • Features a digital bubble level for easy downhole levelling
  • Suitable for harsh environments, resistant to flooding
  • Minimal site footprint
  • Low cost of deployment/low cost of ownership


Polar certified logo


Ultra-low temperature options available



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