effects of fold mountains on volcanic eruption
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Effects of Earthquakes
The effects of an earthquake can be easily split up into two sections. Primary effects are those that occur immediately as the earthquake happens. These include buildings collapsing, roads and bridges being destroyed and railway lines being buckled. All occur due to the shaking of the ground.
Secondary effects are the subsequent effects of the quake, and can be even more devastating then the primary ones. The main secondary effects are:
Fires: usually from ruptured gas lines. This was the main cause of death and damage after the San Francisco earthquake in 1906.
Tidal waves: A tidal waves caused by an earthquake is called a tsunami. They can travel very quickly across entire oceans, before engulfing land 1000’s of miles away. The 1964 Alaskan earthquake caused considerable damage in several Californian coastal areas. Although Los Angeles has escaped so far, its is still considered to be a tsunami hazard prone area. Landslides can often be triggered by earthquakes, causing huge amounts of material to be moved very quickly. This is actually what occurred just before the volcanic eruption on Mt. St. Helens. They are most likely to occur where the land is steep, saturated or weak.
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