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Earth, Planets and Space
Fig. 5 | Earth, Planets and Space

Fig. 5

From: Seismic wave attenuation (1/Qp) in the crust underneath the Eastern and eastern Southern Alps (Europe): imaging effects of faults, fractures, and fluids

Fig. 5

a Spread values of the QP model through four depth slices. The unresolved regions (no ray coverage) are masked with white and the poorly resolved area is separated from the well-resolved area with a white solid line (spread value threshold of 3.4). b The recovery of the classical checkerboard test with alternating anomalies (± 50% of the background model QP = 550) over four lateral nodes. c The recovery of the characteristic model test that is inspired by the QP anomalies (± 50% of the background model QP = 550) of the real data. The high and low input anomalies in both checkerboard and characteristic models are indicated with blue and red squares, respectively. The black crosses and the white circles denote the grid nodes and hypocenters, respectively. FV Friuli-Venetian Region, NWDI Northwestern edge of dolomites sub-indenter, WAU Western part of the Austroalpine units

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