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Describe an earth quake

Updated: 8/10/2023
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11y ago

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You may hear a loud jumbled and rumbling noise, and this may be followed a few seconds later by a distinct jolt or shaking.

If it is a deep earthquake (greater than a few tens of km), then a discrete jolt may be felt, but without any great shaking afterwards. The focus of deep earthquakes may be many hundreds of km deep, and seldom cause any great damage.

Shallow earthquakes are the damaging ones, for they send distinct waves across the surface of the earth, and these shake structures quite vigorously. These are usually less than 60km deep. The Feb 2011 earthquake at Christchurch had peak accelerations greater than 2g! Even well constructed modern buildings are not designed to withstand these events. Additionally, the ground structure may resonate (in the same way a bell will resonate for a few seconds after it is struck), and this may last up to some tens of seconds. The ground may also liquefy and produce fountaining which can last for many hours.

You will be frightened. Your best short run protection is to scramble under a table, and to draw your legs up. The smaller you are, the less you are likely to be struck by falling masonry or building contents.

Some earthquakes are very slow (rarely) - frequencies below 1Hz, and these are quite unsettling, but are less likely to cause damage.

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11y ago
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12y ago

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You could say that it is a smaller form od an earthquake, it shakes the ground, with very minor or no damage. You would just feel the earth shaking but nothing like buildings fall or such... hope that helped

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14y ago

Another name for an earthquake, usually accounted to small earthquakes.

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14y ago

The shaking of the earth is when the plates are either moving towards each other or moving apart from each other.

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14y ago

Spanish for earthquake

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10y ago

how does earth shake

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15y ago

earthquake

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