Earthquakes. Denver Commerce City - Derby area Jarred by series of earthquakes. W11 Je 15, 1965 P-34 Post Je 14, 1965 p.1 Tremors hit Derby - Commerce City area. -Ri,ui J1 19, 1965 P 5 Minor tremors in Northeast Denver today. Post J1 31, 1965 P.1 Strongest quake recorded in Denver hits city Monday. Post S 13, 1965 P-1 Record quake of 4.5 reading shakes Denver. RMN S 15, 1965 P.5 Post S 15, 1965 P 3