The signal generated from the Portable Seismic Source (PASS) can increase signal energy through superposition and correlation processing. The seismometer and the Distributed Acoustic Sensing (DAS) system using optical fibers serve as receivers for this signal. With these technologies, cost-effective and continuous monitoring become possible, even in hard-to-access areas.
These technologies can be applied to various fields, such as subsurface monitoring, civil geothermal power optimization, and CCS monitoring. We provide technical services from research planning to data acquisition and analysis as a university oriented venture.
An example of signals from the PASS obtained by DAS on the seafloor
Tsuji et al., 2021
Technical Papers
https://www.nature.com/articles/s41598-021-97881-5
https://doi.org/10.1785/0220220049
https://onlinelibrary.wiley.com/doi/full/10.1002/ghg.2249
The press release of Tokyo university
https://www.t.u-tokyo.ac.jp/hubfs/press-release/2022/0915/001/text.pdf