Scientists from the USGS Alaska Volcano Observatory worked with researchers from the University of Alaska Fairbanks Geophysical Institute to investigate the cause. They found the meteor over Alaska about 40 miles from the Athabaskan community of Kaltag, which is located on the Yukon River. In a blog post for the American Geophysical Union, UAF science journalist Ned Rozell said witnesses had reported the fireball in regions hundreds of miles apart. One resident of Ruby described it as a “huge ball of light in the sky” moving from north to south. Another resident said it looked like “fireworks” that split into...