How do seismograms recorded during earthquakes scientists learn about the composition of earth?

About 140,000 japanese died in this japanese city when americans dropped an atomic bob at the end of world war ii

The biome that includes evergreen trees is the forest biome.

How have ethnic groups shaped the population in central america and the caribbean? how has migration shaped the population in central america and the caribbean? how has small land areas shaped population in central america and the caribbean? how has a rapid population growth shaped the population in central america and the caribbean?