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Fig. 4


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Historical seismicity in metropolitan France. (a) Map of the 2017 SISFRANCE catalogue (AD 463–2008). Color squares indicate earthquake epicentral intensities I0. (b) Number of macroseismic data points (MPD) per event per year AD. “poor”, “scarce”, “increasing” and “high” indicate level of knowledge on historical earthquakes based on document types and availability.

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