Tema:vnutrenie Sily Zemli — Uchebnik Po Geografii Lobzhanidze

Earthquakes are sudden tremors and vibrations of the Earth's surface caused by the displacement of rock masses deep underground.

The point on the Earth's surface directly above the focus. This is where the shaking is usually strongest. uchebnik po geografii lobzhanidze tema:vnutrenie sily zemli

While underground, it is called magma. Once it erupts onto the surface, it is called lava . Earthquakes are sudden tremors and vibrations of the

A typical volcano consists of a magma chamber , a vent (the "pipe"), and a crater at the top. While underground, it is called magma

The Earth's crust is not a solid shell; it is broken into massive pieces called . These plates float on the plastic layer of the upper mantle (the asthenosphere).

Scientists use an instrument called a seismograph to record waves. The intensity is often measured on the Richter scale (magnitude) or the Mercalli scale (damage level). 3. Volcanism

Some areas of the crust slowly rise while others sink. Over millions of years, this can change the coastline or turn sea beds into dry land. 2. Earthquakes (Seismic Activity)