Until recently, our ability to measure to a high degree of accuracy movement of the seafloor has been limited. This has left a significant gap in our understanding of the earth’s seismic activity, especially relating to the outermost areas of offshore subduction zones, where one tectonic plate moves beneath another. Understanding these areas is not only key to understanding global tectonic systems, but also for forecasting Tsunami activity.
While minute movements of land masses onshore can be measured using Global Positioning Systems, lasers, interferometry, etc., these either do not work or are impractical in the oceans.
We have worked closely with some of the world’s leading marine institutes to provide the tools that can now be used for seabed geodesy and they are in operation in several tectonically active areas around the world.
Our Autonomous Monitoring Transponders (AMTs) are seabed instruments that can take hundreds of thousands of stable, highly precise geodetic observations, safely log the data and on command, wirelessly transmit it up to the surface. They offer relative positional data and ranging between them, which enables scientists to calculate movement between plates.
We have also developed Fetch, for deployments of more than 10 years, and, because pressure sensors are well known to drift over time, Fetch AZA (Ambient-Zero-Ambient) can be used to periodically self-calibrate the pressure sensor.