Figure 2: Map of the Duero basin, coloured according to elevation (m)
with mountains in the north, east and south visible as bright yellow
regions. The Bay of Biscay is visible in the north. Grey dots represent
the sampling locations for population growth rates. Estimated epicentre
locations are noted with the mustard and white points. The Duero river
is visible as the turquoise line running east to west. Elevation data
was downloaded from copernicus[dot]eu (EU-DEM v1.1) and waterway
data from ea[dot]europa[dot]eu.