The problem of identifying small-magnitude banned nuclear tests and discriminating between such tests and the background of earthquakes and mining-related seismic events is a challenging research problem. Because they emphasize CTBT verification research, the 12 papers in this volume primarily address regional data recorded by a variety of arrays, broadband stations and temporarily deployed stations. Nuclear explosions, earthquakes, mining-related explosions, mine collapses, single-charge and ripple-fired chemical explosions from Europe, Asia, North Africa and North America are all studied.