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Fig. 3 | Earth, Planets and Space

Fig. 3

From: Very broadband strain-rate measurements along a submarine fiber-optic cable off Cape Muroto, Nankai subduction zone, Japan

Fig. 3

Comparison of the noise levels between the DAS and nearby seismometers. a Strain rate spectra at ten selected channels. Each line shows the median value of the periodograms calculated at 5-min intervals for the entire observation period (January 27–31, 2020 (JST)), which were computed at 5-min intervals during the entire observation period (Figure S1). b Acceleration spectra at five seismic stations. Solid and dashed lines are for the vertical- and horizontal-component seismometers, respectively. Bold gray lines show a standard noise model (Peterson 1993). MRA04 and MRG29 are DONET2 stations, and UMJF is a F-net station; each of these stations has a broadband sensor. We corrected the instrumental response for the MURH and KTGH spectra, which are Hi-net stations

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