Which statement concerning earthquakes is NOT true?

Earthquakes can indeed occur at tectonic plate boundaries, where the movement and interaction of these plates generate seismic activity. However, they can also occur within tectonic plates, away from the boundaries. This can happen due to stress accumulation and failure within the plates. Intraplate earthquakes, though less common, illustrate that the phenomenon of earthquakes is not strictly limited to the edges of tectonic plates.

The other statements about earthquakes are accurate. Triangulation is a method used to determine the epicenter of an earthquake by analyzing data from multiple seismic stations. Combining seismograms from different locations helps in pinpointing the location of the epicenter. Seismologists study primary (P) waves and secondary (S) waves to calculate the distance to the epicenter and the focus of the earthquake, as these waves travel at different speeds and provide critical information about the Earth's interior.