Real-Time Optical MEMS-based Seismometer

Currently, nuclear tests are monitored by the International Monitoring System (IMS), a network of automated seismic stations that operate to record any evidence of clandestine nuclear explosions. Although geographically extensive and relatively accurate, this system does not adequately detect low-yield nuclear detonations, and there is a delay in information dissemination. This project will develop a low-cost miniature seismometer based on the latest developments in micro-opto-electromechanical systems technology. The seismometer will be capable of detecting accelerations as small as 1 nano-g, with a dynamic range of 120 dB. In addition, it will be rugged, rapidly-deployable, and capable of unattended operation and interrogation in real time. During Phase I, a prototype instrument was designed and proof-of-principle was established analytically and experimentally. In Phase II, the seismometer will be fabricated and demonstrated, based on the Phase I design. A manufacturing study will be conducted to advance the prototype to a production-quality design. Commercial Applications and other Benefits as described by the awardee: In addition to making the assessment of nuclear detonations available immediately, the new seismometer should find use in a broad range of activities including geological research (mining and oil prospecting), earth sciences (early warning for earthquakes, volcanoes, and tsunamis), space exploration (satellite drag measurements, docking, navigation), homeland security (footstep detection, tampering, entry, and illicit activities), and building and vehicle safety.