• A 6.4 magnitude earthquake followed by more a dozen aftershocks rumbled under the Humboldt County coastline near Ferndale early Tuesday morning.
• Epicenter near the seismically active triple junction of the Cascadia megathrust — which runs from Vancouver Island to Northern California.  The San Andreas and Mendocino faults also stretch into zone.  A 7.2 magnitude earthquake struck there in 1992.
• The California Highway Patrol reported the Fernbridge, a 1,320-foot-long concrete arch bridge that crosses the Eel River, has cracks in four places.

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