The New Yorker recently published an article about composer John Luther Adams. Most of the story is about his life, but I thought the interesting part is about “The Place Where You Go to Listen,” a sound-and-light installation where “Earth signs” make music:

When I arrived the next day, just before noon, “The Place” was jumping. A mild earthquake in the Alaska Range, measuring 2.99 on the Richter scale, was causing the Earth Drums to pound more loudly and go deeper in register. (If a major earthquake were to hit Fairbanks, “The Place,” if it survived, would throb to the frequency 24.27Hz, an abyssal tone that Adams associates with the rotation of the earth.)

Even more spectacular were the high sounds showering down from speakers on the ceiling. On the Web site of the University of Alaska’s Geophysical Institute, aurora activity was rated 5 on a scale from 0 to 9, or “active.” This was sufficient to make the Aurora Bells come alive. The Day and Night Choirs follow the equal-tempered tuning used by most Western instruments, but the Bells are filtered through a different harmonic prism, one determined by various series of prime numbers. I had the impression of a carillon ringing miles above the earth.