Early-morning 3.0-magnitude quake wakes Northern California, seismologists say
Briefly

Magnitude measures the energy released at the source of the earthquake, replacing the old Richter scale. Quakes between 2.5 and 5.4 are often felt but cause little damage.
Experts advise dropping to hands and knees during an earthquake, holding onto something sturdy. Cover your head, crawl under a table if possible, or to an interior wall.
Read at Sacramento Bee
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