The surface trace of the Ishikari fault (source: AIST fault database) and the epicentre of the M=6.6 event (yellow star, source: USGS)

The surface trace of the Ishikari fault (source: AIST fault database) and the epicentre of the M=6.6 event (yellow star, source: USGS)

The surface trace of the Ishikari fault (source: AIST fault database) and the epicentre of the M=6.6 event (yellow star, source: USGS)