November 1960 Peru earthquake is located in Peru

The November 1960 Peru earthquake occurred offshore northern Peru on November 20, 1960 at 17:02 local time (22:02 UTC). The magnitude of the earthquake was put at M_s 6.75 by using the conventional magnitude measurement within a shorter duration of ~20 s.^[2] However, there is a large discrepancy between the magnitudes in M_s and M_w in this earthquake. The discrepancy was resulted from that the earthquake had a long source duration of about 130 s, and by calculating the seismic moment, the magnitude would be M_w 7.6 or M_w 7.8, according to different sources.^[2][3] This earthquake belongs to a category of earthquakes with slow rupture velocities and potential of producing tsunamis larger than those expected from the moment magnitudes.^[4]

• http://en.wikipedia.org/wiki/November 1960 Peru earthquake