An earthquake. ""That kind of event could pack a wallop."" It sure could. But this doesn't--the second echo-logical catastrophe story by the author of the more strongly handled The Swarm (1974). The scene is Rhode Island where Harry Vail lives with his second wife and his youngster and hears earthsounds--in fact he feels the house is occupied. The crack in the wall widens and dampens; a souffle falls; there's trouble with the drain pipes and the dryer; one of the neighbors disappears; a shotgun goes off into the head of another; Harry's trapped in the sauna; etc., etc. As in the first book, Herzog works in some convincing scientific data about the phenomenon itself but this time he doesn't succeed in making your teeth rattle as much as that loose shutter.