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Fig. 4 | Earth, Planets and Space

Fig. 4

From: Precise aftershock distribution of the 2019 Yamagata-oki earthquake using newly developed simple anchored-buoy ocean bottom seismometers and land seismic stations

Fig. 4

Example of seismograms from the anchored-buoy OBSs and temporal land seismic stations for an earthquake. Three-component records are shown. The records of the OBSs have been converted from original records using information from tiltmeters and the azimuth meter. No filter has been applied. The estimated coordinates of the epicenter of the event are 38.66° N, 139.44° E. The depth and magnitude of the event are 9.9 km and 3.7, respectively. The station is labeled above the vertical component. Black bars on the north–south component indicate the scale of amplitude in velocity. Root-mean square averages of amplitude for the first 0.5 s are shown by numerals. Solid and open inverted triangles indicate P- and S-wave arrivals, respectively

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