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A 2.4 magnitude aftershock struck Bluffdale Saturday night, according to the University of Utah Seismograph Stations — the fourth to affect northern Utah in less than 48 hours.

SALT LAKE CITY — A 2.4 magnitude aftershock struck Bluffdale Saturday night, according to the University of Utah Seismograph Stations — the fourth earthquake to affect northern Utah in less than 48 hours.

The University of Utah also reported a 3.3 magnitude earthquake southwest of Kanosh at about 3 p.m. Saturday.

The Saturday quakes followed two others in Bluffdale on Friday morning — a 3.3 magnitude earthquake at 5:02 a.m. and a 3.8 magnitude earthquake at 5:10 a.m.