Observatory

In contrast to conventional observatories that monitor an individual signal only, we have designed IPOC to capture a large range of different, possibly associated deformation processes.
With broadband seismographs deployed in deep bedrock caverns we measure ground shakings from earthquakes or other sources that last from a tiny fraction of a second to several hours. These caverns and several locations in cities or mines also contain so called strong-motion seismographs that help us in understanding how an earthquake affects manmade structures.

 

Creepmeters monitor continuous or sudden surface displacements of active faults that may be related to large earthquakes. The deformation of the Earth's surface is observed by continuously recording GPS stations. In addition, Interferometric Synthetic Aperture Radar (InSAR) uses radar satellite images that sample surface deformation of the Earth at faults and volcanoes at high spatial resolution. Tiltmeters record the gradual to abrupt tilting of the Earth's surface. Finally, magnetotelluric instruments measure changes in the electrical conductivity within the Earth that may reflect large scale fluid relocation associated with fracture processes at depth.

Where possible and sensible, the different measurements are bundled at multi-parameter stations. The instrumentation allows measuring continuous deformation of the subduction system for time scales ranging from a fraction of a second to years. For additional temporary field campaigns please see the projects page.