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Seismograms recorded by a prototype optical fiber seismometer in an IGPP laboratory at SIO and an STS-2 at the ANZA seismographic station SOL about 3 km away.
This figure shows sections of the seismograms where the Optical seismometer’s signal has been processed to give ground velocity and offset from the STS-2 seismogram for clarity.
Credit: Mark Zumberge, Jon Berger, & Jose Otero, Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography.