 It was delightful to me. Just minutes after the Landers earthquake, there began to be a series of earthquakes in volcanic centers such as Mammoth Lake and Yellowstone and Lassen and Shasta. And there was absolutely no mistaking the pattern. They were triggered by the effect of this Landers earthquake hundreds of miles away. Of course, just 50 miles away was the Big Bear quake, 6.8. How can that be?