Figure 3. Seismic signals of the Feb. 6, 2023, magnitude 7.8 Türkiye-Syria earthquake were recorded by stations in Costa Rica. The three columns correspond with three different stations: COVE, PEZE and DUNO, respectively. The top row shows vertical component of the seismic records for each station. We show the vertical component for two main reasons. First, there are amplitude problems in the horizontal components for some stations, and so we decided to homogenize by only showing the vertical component. Second, the P-wave from local microearthquakes is clearer in the vertical component. Panels b, f and j show the same vertical component that has been filtered between 2 and 10 Hz. Panels c, g and k show the spectrogram as a function of time resulting from the Fourier transform of the original seismogram. The bright orange vertical lines against the purple background correspond to earthquakes. Credit: Hajaji and Chaves, 2024 CC BY-NC-ND 4.0

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Figure 3. Seismic signals of the Feb. 6, 2023, magnitude 7.8 Türkiye-Syria earthquake were recorded by stations in Costa Rica. The three columns correspond with three different stations: COVE, PEZE and DUNO, respectively. The top row shows vertical component of the seismic records for each station. We show the vertical component for two main reasons. First, there are amplitude problems in the horizontal components for some stations, and so we decided to homogenize by only showing the vertical component. Second, the P-wave from local microearthquakes is clearer in the vertical component. Panels b, f and j show the same vertical component that has been filtered between 2 and 10 Hz. Panels c, g and k show the spectrogram as a function of time resulting from the Fourier transform of the original seismogram. The bright orange vertical lines against the purple background correspond to earthquakes. Credit: Hajaji and Chaves, 2024 CC BY-NC-ND 4.0

Figure 3. Seismic signals of the Feb. 6, 2023, magnitude 7.8 Türkiye-Syria earthquake were recorded by stations in Costa Rica. The three columns correspond with three different stations: COVE, PEZE and DUNO, respectively. The top row shows vertical component of the seismic records for each station. We show the vertical component for two main reasons. First, there are amplitude problems in the horizontal components for some stations, and so we decided to homogenize by only showing the vertical component. Second, the P-wave from local microearthquakes is clearer in the vertical component. Panels b, f and j show the same vertical component that has been filtered between 2 and 10 Hz. Panels c, g and k show the spectrogram as a function of time resulting from the Fourier transform of the original seismogram. The bright orange vertical lines against the purple background correspond to earthquakes. Credit: Hajaji and Chaves, 2024 CC BY-NC-ND 4.0

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