The focus is the place inside Earth's crust where an earthquake originates. The point on the Earth's surface directly above the focus is the epicenter. When energy is released at the focus, seismic waves travel outward from that point in all directions.
Yes, the capital of a state or country is that state/country's capital city. Santiago is Chile's capital city. For example, the capital of the United States is Washington D.C., which is a city.
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The indigenous peoples of the Americas arrived in North America via the Bering Strait land bridge, which existed approximately 15,000 years ago between Siberia and Alaska, and probably also via a succession of sea migrations from Asia.
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ENDORHEIC BASINS
Inland sea is an example of this