Usually, areas around fault-lines are more prone to earthquakes.
Some of the major fault lines are around:
1. Italy (hit in 1980; magnitude: 7.2)
2. Hayward, San Francisco in California (hit in 1906 at San Francisco; magnitude: 7.8 and again in 1989 at Loma Preita; magnitude: 6.9)
3. Himalayan region (hit several times since 1999, at various places spanning across Afghanistan, Pakistan, India etc.)