Fig. 9From: Peak ground motions and characteristics of nonlinear site response during the 2018 Mw 6.6 Hokkaido eastern Iburi earthquakea Vertical component acceleration recordings at the surface (upper panel) and borehole (middle panel) at site IBUH01 and the surface at HKD127 (lower panel). The values for the borehole recordings are magnified by a factor of 10 to aid visual comparison. A black rectangle denotes the portion of the plot, which is enlarged in b. The ratio of total duration of negative pulses to the total duration of positive pulses is indicated above each trace for the time window from 26 to 30 s in b. See Fig. 3 for site location and text for further explanationBack to article page