Earthquake sensors mapping Napa to better predicting seismic damage
Come the week of September 7th, the US Geological Survey will use buried mini-explosives, to generate a swarm of almost undetectable, underground earthquakes in the city of Napa.
Come the week of September 7th, the US Geological Survey will use buried mini-explosives, to generate a swarm of almost undetectable, underground earthquakes in the city of Napa.