Why do some mountains get taller after earthquakes?
Quick Answer
Earthquakes can suddenly release stress and move blocks of crust upward along faults, raising some parts of a range. Over time, repeated quakes and ongoing plate movement can build mountain relief.
The Full Story
Mountain belts are full of faults that store elastic energy as plates push together. When a big earthquake happens, one side of a fault may be thrust upward relative to the other, producing a sudden change in elevation. This is especially common in compressional settings such as the Himalayas, where thrust faults help lift the crust. Earthquakes can also reshape mountains by causing landslides that remove material from one slope and deposit it elsewhere. The overall mountain height still depends on the long-term balance between tectonic uplift and erosion.
Key Facts
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"Can one earthquake literally raise a mountain?"
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