California, Mexico, India, Chile, Japan, and Central America are areas that could experience earthquakes soon due to their locations along plate boundaries, including the San Andreas Fault along California and northwest Mexico. Earthquakes tend to occur when tectonic plates move along transform, convergent, and other boundary lines. Foreshocks, changes in seismic wave velocities, and clusters of past quakes help predict future earthquake activity, with the west coast of South America experiencing many large quakes due to its position along a boundary that has generated a high volume of earthquakes in Chile.