Crustal earthquakes result from deformation and mountain building in the overriding South America plate and generate earthquakes as deep as approximately 50 km. Interplate earthquakes occur due to slip along the dipping interface between the Nazca and the South American plates.
What causes earthquakes in Chile?
Chile is a hotspot for earthquakes because the Nazca plate, a tectonic plate which moves eastwards with a rate of 6.6 cm per year, collides with the South American plate off the Chilean coast. … For example, the plates shifted by more than 30 meters in the 1960 earthquake.
What two plates were involved in the earthquake?
Tectonic Plate Boundaries
The Pacific Plate (on the west) slides horizontally northwestward relative to the North American Plate (on the east), causing earthquakes along the San Andreas and associated faults. The San Andreas fault is a transform plate boundary, accomodating horizontal relative motions.
Are earthquakes common in Chile?
In Chile, large earthquakes through recent history occur roughly every 25 to 100 years apart. The strongest earthquake ever recorded by modern instruments was a 9.5-magnitude quake on May 22, 1960, which was centered offshore in southern Chile, where it set off a huge tsunami.
Where are earthquakes most common in Chile?
Chile has experienced all of these phenomena-the Andes mountains and a long history of earthquakes and volcanoes. Earthquakes occur at any fault line, but the most destructive earthquakes happen at subduction zones.
Why does Chile have so many tsunamis?
Other natural hazards in Chile:
Tsunamis are caused by earthquakes or other seismic eruptions on ground of an oceans and can cause massive tidal waves, which run with enormous force on land, causing great devastation.
How strong are earthquakes in Chile?
In Chile earthquakes of the world’s most extreme strength occur. In the case of earthquakes with a magnitude of more than 9.0, destruction and devastation can occur within a range of up to 1000 kilometers. Measured by the size of the country, earthquakes occur above average, but not excessively often.
What is the longest lasting earthquake?
A devastating earthquake that rocked the Indonesian island of Sumatra in 1861 was long thought to be a sudden rupture on a previously quiescent fault.