Week 2014.25 (June 22-28) ~ The world came to you

Where were you at 5:30pm EDT on Monday June 23? If you happened to be in North America at the time, you might be interested to know that you were lifted up and down a half an inch or more by the Earth itself, as seismic waves from a powerful earthquake in the Aleutian Islands surged outward across the planet’s surface and deep into its interior.
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Week 2014.22 (June 1-7) ~ A planetary echo chamber

Among this week’s notable sounds are the seismic waves from an earthquake in Alaska (magnitude 5.7, at about 02:49 in this program). Notice that it takes several seconds for its sounds to trail off and disappear into the background ambiance of the Earth. Keep in mind that each second of listening time is equivalent to 30 minutes of real Earth time — which means that these seismic waves actually echoed and scattered across the Rocky Mountains and the entire crust of North America for a couple of hours before finally fading away. It’s a simple demonstration of the planet’s marvelous effectiveness as a natural echo chamber.
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