Aftershock 03
Aftershock 03 : Natural Disaster. "Earthquakes that follow the largest shock of an earthquake sequence. They are smaller than the "mainshock" and can occur over a period of weeks, months, or years. In general, the larger the mainshock, the larger and more numerous the aftershocks and the longer they will continue". (USGS, Putting Down Roots in Earthquake Country, 2007, Glossary)