Figure 6

(a) Map view of the seismicity that occurred in the Fontana area from February to September 2019 from the 1981–2022 catalog of Hauksson et al.52. (b) Distance-time evolution of the earthquake swarm in the black polygon in panel (a). Distance is relative to the grey square in (a). The magenta line in (b) is the best fit line. Earthquakes are color-coded based on the date in (a) and the focal depth in (b).