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Is Land Subsidence Also Caused By Earthquakes

How man is responsible for earthquake?

Sometimes earthquakes are caused by men, sometimes by women. The correct way to ask the question is ‘Do humans cause earthquakes’? And the answer is yes, there are a number of causes of earthquakes that are caused by human activity. Building a big dam may cause the weight of water to cause a ground shift and quake. Fracking is widely recognized to cause quakes. Oklahoma used to get a magnitude 2 quake once or twice a year, then after fracking began a decade ago, there are dozens of quakes a week, sometimes up to a magnitude 4.Groundwater extraction of withdrawal of oil may create an underground void and a subsequent subsidence quake. In fact, in populated coastal areas where groundwater is extracted, land subsidence may be responsible for apparent sea level rise because the land is sinking. I’ve seen data suggesting that as much as half of the measured sea level rise is because of groundwater use and coastal subsidence.

What causes cracks on the streets? earthquakes?

Most the cracks on the road are due to the poor construction of the road.

There could be several causes of cracks.

1. Subsidence of the ground do to local ground water withdrawal.
2. Compaction of the sub-straight in the road foundation.
3. If there is a sewer line under the road, this tunnel could deform causing the ground above to sag.
4. Physical removal of sediment from under the due to water run-off
5. Vibration of the traffic on the road.
6. Freeze-thaw
7. Locally we had a small flood, this caused the ground to swell with water which cracked a lot of roads.
8. Broken underground water pipe.
9. Large tree roots pushing up the road.
10. Poor maintenance of the road causing it to deteriorate.
11. But there are a few occasions where the roads are cracked due to faulting.

What impact do earthquakes have on landforms?

I have to do a Science project on Natural Disasters over Christmas Break (ugh) and need to know the impact that earthquakes have on landforms. Also the impact earthquakes have on weather/climate if you can.

What causes earthquakes?

They are caused when one slab of rock is moving in a different direction from the adjacent rock but they are in contact and frictional forces build. At some point the force of the moving rocks over powers the frictional forces and it releases the built up stresses. Generally the cause is related to plate tectonics.

Would oil drilling in long run leading to subsequent earthquake on Earth?

It not only can, it has and does. And in at least one case, in California, this has caused a dam failure and resulting flood.Extensive oil drilling causes subsidence, which is really a no-brainer, when you consider that oil drilling removes a volume of material from underneath the ground, and unless that volume is replaced in some way, it will leave a void that the rocks above cannot be expected not to fill.  This naturally causes earthquakes.  Not large earthquakes, mind you, but earthquakes nonetheless.

Is an earthquake a constructive or destructive force?

i would not call it either.
it's a force that changes the earth.
some features may be destroyed (subducted).
other features (eg. mountains, rift valleys) may be created.

What are the links between earthquakes and oil drilling?

Can oil & gas operations cause earthquakes?Human activities such as construction, agricultural, mining and industrial activities can cause triggered or induced seismicity – or tremors in the earth.Human activities such as construction, agricultural, mining and industrial activities can cause triggered or induced seismicity – or tremors in the earth. But such tremors are rarely a cause for concern given the mild nature of most human-caused seismic events. In fact most cannot be felt, being detectable only with sensitive instruments.Tremors generated by oil and gas hydraulic fracturing – or “fracking” – are usually a million times weaker than the felt seismicity threshold, typically measuring minus 2 (below zero) on the Richter scale. This is why over two million wells have been fracture stimulated worldwide since the 1940s without creating earthquake hazards.There have been instances of felt seismicity attributed to oil and gas operations. These were generally associated not with production or fracturing, but with wells that inject water into rock formations deep underground. Such felt seismicity has also been attributed to various industrial activities, as well as water impoundment behind large dams. Of more than 172,000 oil and gas-related injection wells in the United States, only a small percentage have been associated with felt seismicity. In these cases, modification of fluid injection activities mitigated the seismicity.ConocoPhillips and others in the industry are actively working with independent researchers to arrive at science-based conclusions and solutions that minimize the probability of human induced felt seismicity.

Will California sink one day due to an earthquake?

Q: Could California sink into the ocean after a huge earth quake?A: No.The biggest earthquakes in California happen along the San Andreas fault, or nearby faults that are closely related.The pressures that cause large California earthquakes come from the fact that the entire tectonic plate west of the fault zone (the Pacific Plate) is slowly moving north relative to the entire tectonic plate on the east side (the American Plate).At the epicenter of a large quake, there can be a significant amount of displacement of ground on the west side relative to the east side. In the 1906 quake, there was at least 16 feet of displacement nearest the epicenter. There is a fence in Marin County that had crossed the faultline. The quake moved the west side of the fence 16 feet to the north relative to the east side of the fence, opening a 16 feet gap in the process.The point here is this - these pressures do not cause downward movement, they cause lateral movement. A part of California moves to the north in a quake, but not down. So we don’t get anything “sinking into the ocean” - at least not on any large scale.A big quake could certainly trigger a landslide, and there are bluffs overlooking the ocean that are vulnerable to sliding into the ocean, from earthquakes, or from normal erosion. But it is inconceivable that an earthquake could cause anything more than a minute portion of California to slide into the sea. Way less than 1% of the state. Maybe enough land for a few houses to be perched on.

How does an earthquake affect the ecosystem?

Earthquakes can affect ecosystems in several ways. The intense shaking from large earthquakes can cause liquefaction in flat areas and landslides in steep areas. These can disrupt local ecosystems. Tsunamis generated by earthquakes can do great damage even far away from the earthquake.Some earthquakes also cause vertical and horizontal permanent displacement of the surface that changes the flow of water in rivers, lakes, and even the ocean. The 1700 M9 Cascadia Earthquake in NW North America caused widespread subsidence along the coast of Washington and Oregon that submerged and killed forests. Those dead trees are one way we know how large the earthquake was and when it happened.