3-6 ┊ 3749 words ┊ ◄))
3-6, 3749 words, 28 minutes audio time.
Scientists estimate that each year there are several million earthquakes throughout the world. Some are so small that they are never detected. Others or so large that they set off a chain of aftershocks and tsunamis. Read about these terrifying events to learn what causes them and how scientists detect them.
READ
