This Deep Panic

Myth and reality clash when a catastrophic earthquake hits the Pacific Northwest and creatures from legends are released. Finally free, they hunger for flesh, for souls, for life. Now, the people who call the Northwest home fight to survive the ravages of a shifting earth and the horrors it disgorged. Curtis Jonason, a scientist, had nothing but his work for company and nothing to fear but his imagination -- until the quake strikes.
Anya Lindgren, devastated by personal loss, chose to isolate herself and grieve - until the quake strikes. Sharon Driscoll, middle-aged and angry, seeks death on her terms - until the quake strikes. And Ethan Reynolds, an environmental science teacher, picked a bad day to take high school students on a hike. Now on paths far different than anticipated, they struggle through the ravaged forest to outlive the ancient hunt.
Not all will survive. And no one will escape unscathed.