The Hammer of Eden book by Ken Follett

NEW YORK TIMES BESTSELLER The FBI doesn’t believe it. The Governor wants the problem to disappear. But agent Judy Maddox knows the threat is real: An extreme group of eco-terrorists has the means and the know-how to set off a massive earthquake of epic proportions. For California, time is running out. Now Maddox is scrambling to hunt down a petty criminal turned cult leader turned homicidal mastermind. Because she knows that the dying has already begun. And things will only get worse when the earth violently shifts, bolts, and shakes down to its very core. Published By Fawcett on 1999-11-02