CRF Blog

20 Things You Didn’t Know About … Earthquakes

by Bill Hayes

Discover magazine looks at 20 Things You Didn’t Know About … Earthquakes.

6. A massive quake near Lisbon, Portugal, in 1755 was felt as far away as Finland. It inspired the first proposal that waves of energy traveled from a single point of origin through rock, much the way sound waves travel through air.

7. It wasn’t until the early 20th century, though, that researchers understood seismic waves, which we now categorize as either body (moving through the planet’s interior) or surface. [more]