What happened underground to cause the christchurch earthquakes?
The quake was caused by the collision of the Pacific and Australian techtonic plates.
Not usually. Although earthquakes often occur before a volcanic eruption, they are not the cause. The earthquakes are the result of magma (molten rock) moving underground leading up to an eruption. A few volcanic eruptions are thought to have been triggered or initiated by earthquakes, but this is not the typical case.
Underground detonations do cause earthquakes, however unlike natural earthquakes they produce only p-waves, they do not produce any s-waves. This makes them very easy to identify. The only underground nuclear detonations that have occurred so far were test shots. However deep penetrator warheads designed to take out missile silos or other fortifications will produce even stronger earthquakes, due to their much higher yield compared to typical test shots. Low altitude airbursts sometimes produce weak vibrations…
No, not directly. But the climate problems that we cause surely affects the nature. Actually, no. Man cannot create earthquakes no matter how hard they try. Maybe there are climate problems, but if you went through school ^^^, you would know that earthquakes occur underground and have nothing to do AT ALL with meteorology. Just so you know.
In general earthquakes are caused by geologic forces related to plate tectonics. However humans can and have produced earthquakes in two ways: underground nuclear weapons tests, although the shock waves from such quakes contain only P waves making them clearly and easily distinguishable from other quakes (which always include some S waves) underground pumping operations to extract water or oil or injecting fluids (e.g. injecting water into depleted oil fields to help extract the remaining…
Christchurch was a very beautiful place until the earthquake happened, and nature stuck a course. The Liquefaction side of it is a liquid that comes from the ground and the easiest way of saying it; it pops up and says hello. Christchurch had so much damage from the quake people found everything destroyed, but also finding out that liquefaction will destroy it even more. must have been heart braking. Young kids were scared from the…
Usually from slipping (faults and faulting) of tectonic plates or movement of fault planes, or when tectonic plates collide together. Oscillation by mechanical (man-made) means, explosions, landslides, rockfalls, and volcanic eruptions have been known to cause localized earthquakes. Underground (subsurface or near subsurface) detonations are a suspected additional cause of earthquakes.
Movement of high pressure magma underground typically occurs before a volcanic eruption. This magma is under such a high pressure that it can cause hydraulic fracturing of the surrounding rocks and even bulging of the crust. Both these events will release seismic waves (cause earthquakes). All these data help geologists predict that an eruption is about to occur.
Earthquakes can effect the environment in more ways then just a shifting of the land above the quake epicenter. Earthquakes can change the flow and level of water courses. The quake can change the quality of the water in underground stream or re direct them away for area that depend on them. Quakes also cause mortality among wildlife that can disrupt the food chain causing organisms to die.