Raging Tide — Deborah D. Moore

The Journal continues with the terror of an earthquake that rips the country in half.

The world was shaking apart and the North American continent was at the heart of it.  An earthquake ripped the country in half at the New Madrid fault line.  Shipping ceased and sent the country into a tailspin, with the small towns like Moose Creek suffering the most.  Recovery came slow as the country pulled itself together, until another more terrifying quake hit, awakening the sleeping caldera beneath Yellowstone.  The ash that circled the world disrupted weather patterns everywhere, blotting out the sun and stirring up massive storms.

Allexa Smeth and Colonel James Andrews set out to find the rift that broke the Upper Peninsula in half. Finding the colonel's men was a priority, but Allexa and the colonel didn't know it would mean getting into more than they bargained forâ€"and possibly more than they could handle.