The South Napa Earthquake revealed how much we've yet to learn about seismic faults in the Napa Valley.
It may happen just once in your lifetime: a large tsunami is coming, big enough to make you run for your life. Where do you go? USGS has released a new tool to help planners plot out shelters in West Coast communities and other tsunami-hazard zones.
50 years ago today, the Good Friday earthquake in Alaska sent shockwaves through earth science itself.
Nature shows almost no signs of the Loma Prieta earthquake 24 years later. But the human landscape still carries scars that should remind us to practice continual preparedness.