Fig. 2: Amplitude ratios from the seismic obvervations.
From: Subsurface structure and impact process of Yilan Crater, northeastern China
a, c show the amplification as a map of the band-limited power of the recorded signals. The colors indicate the amplitude ratio between the value at each station and the station where the minimum value is obtained. Here, the value at each station represents the integral of the power spectrum summed over the 0.5–10 Hz frequency range for a local M3.1 earthquake (a), and over the 0.5–2 Hz range for the teleseismic event 2023/04/24 20:00:57.265 Mw 7.1 (c). b, d show the power spectrum as a function of the frequency and the location of the receivers along a selected profile YL07 (a).
