A rockfall was discovered on the left bank of the Verkhnyaya Angara River, 25 km away from the northwestern doorway of the North Muya tunnel of the Baikal-Amur Railway. We investigate the tectonic position of the rockfall and its linkage to a moderate earthquake using structural data and show that earthquakes of this intensity can produce notable ground failure if the local fault pattern is favorable for passage of seismic waves.

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