No part of Earth's surface is free from earthquakes. Some regions experience them more frequently than others. The reason for this is because it may be where tectonic plate boundaries meet. The largest events usually happen where two plates are colliding, or colliding and sliding past one another. This is particularly the case around the edge of the Pacific Plate, for example in New Zealand, Vanuatu, the Solomon Islands, Papua New Guinea, Japan and the Americas, and in Indonesia. This is where the Indo-Australian Plate collides with the Eurasian Plate. These collision zones can range from 0-700km in depth.