Unlike hurricanes, which can be predicted with enough precision that people can be evacuated before they reach land, earthquakes hit with no warning. In various earthquake-prone locales, Russian, Japanese and American scientists are doing research they hope will change that. U.S. efforts are focused upon Parkfield, California, a town along the San Andreas fault where 6.0 earthquakes strike on the average every 22 years. Researchers have installed an array of sensitive equipment, in an attempt to discover phenomena that might give warning of an impending quake. A similar project is underway in Kobe, Japan, where researchers are hoping to discover whether rocks under stress emit electromagnetic signals in the weeks before a quake.