Only earthquakes of magnitude 6 or above are included, unless they result in damage or casualties, or are notable for some other reason.

Two huge 8 magnitude earthquakes (8.6 and 8.2) struck Indonesia in April, but caused little damage, and no tsunami.

The deadliest quake occurred in Iran, while other destructive tremors were observed in Guatemala, Philippines, or China.

Note that an increase in detected earthquake numbers does not necessarily represent an increase in earthquakes per se.

Population increase, habitation spread, and advances in earthquake detection technology all contribute to higher earthquake numbers being recorded over time.