Fig. 4: Seismicity and thorium concentration. | Nature Communications

Fig. 4: Seismicity and thorium concentration.

From: River thorium concentrations can record bedrock fracture processes including some triggered by distant seismic events

Fig. 4

A Map of the western US showing the location of East River (ER) and Coal Creek (CC) in Colorado, seismic monitoring stations and the epicenter of seismic event #9363207. Map adapted from Google Earth. B Example of seismicity preceding thorium excursions in ER and CC that was recorded at two stations in Colorado and attributed to catalogued event #9363207.

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