The pressure wave of a bolide entering the atmosphere is akin to a pressure wave created by an explosion. Because of this, ReVelle and Whitaker often speak of meteor size in terms of explosive yield - the larger the yield, the greater the diameter of the meteor. Based on the energy and speed, ReVelle and Whitaker estimate the first meteor was six feet in diameter. The second meteor probably was at least twice as large. Each year a number of large meteors enter the atmosphere and are detected by the Los Alamos arrays.
Larger bolides entering the atmosphere occur less frequently, but they do occur nevertheless.
Bolides produce their brilliant light shows tens of miles above Earth's surface. Fortunately for people on the ground, most meteors explode into thousands of tiny pieces or burn up completely before they hit the surface. If the August and April meteors made it to the surface, they probably hit water - well away from any populated areas. When they do hit the ground, their destructive power is unmistakable. Ariz. The Los Alamos infrasound arrays don't provide advanced warning of a meteor's approach because the infrasonic signature takes several minutes to hours to reach the stations.