Fig. 3 | Scientific Reports

Fig. 3

From: Waveform cross-correlation analysis and magnitude estimation for the 1887 Ligurian earthquake determined from magnetogram recordings

Fig. 3The alternative text for this image may have been generated using AI.

(a) Map showing the locations of the Greenwich magnetic observatory and the broadband seismic station GB.SWN1 (indicated by light blue triangles), as well as the estimated epicenters of the 1887 Ligurian earthquake and the 2012 Emilia earthquake (marked by red stars). (b) Superposition between the simulated magnetometer trace for the 20 May 2012 \(M_w\) 6.10 Emilia earthquake recorded at GB.SWN1 (blue trace) and the digitized H magnetogram recorded at the magnetic observatory in Greenwich (orange trace). The synthetic Emilia magnetogram is scaled with respect to the Greenwich magnetogram based on the difference in their Fourier amplitude spectra.

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