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Listed under: Science > Earth and space > Earth structure > Earth's crust > Earth movements > Seismic waves

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Locating the Earth’s shadow zone

TLF-IDA004542

The lesson involves modelling observations that scientists made when analysing earthquake waves and their movement through the interior of the Earth; and then interpreting the information to propose the internal structure of the Earth.

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Understanding the National Earthquake Alerts Centre

TLF-IDA003970

This video introduces the National Earthquake Alerts Centre. The video explains that earthquakes are detected by a network of seismometers; each station sends seismic information for analysis and checking by seismologists on duty. The video describes the types of wave forms in earthquakes and the sequence of events in ...