Energy & Green Tech

Water leaks indicate new damage at Fukushima nuclear plant

Cooling water levels have fallen in two reactors at the wrecked Fukushima nuclear plant since a powerful earthquake hit the area last weekend, indicating possible additional damage, its operator said Friday.

Engineering

Strengthening homes against earthquakes

Ph.D. candidate Ömer Türkmen, at the TU/e Department of the Built Environment, did extensive testing on a new way of strengthening masonry walls that is cost effective, minimally invasive, easy to install and a great improvement ...

Other

Tokyo's main Olympic stadium ready to fight heat

Construction of the $1.4 billion main Tokyo Olympic venue has officially completed, constructors said on Saturday, and is set to fight excessive heat with a nature-inspired design.

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Earthquake

An earthquake (also known as a tremor or temblor) is the result of a sudden release of energy in the Earth's crust that creates seismic waves. Earthquakes are recorded with a seismometer, also known as a seismograph. The moment magnitude of an earthquake is conventionally reported, or the related and mostly obsolete Richter magnitude, with magnitude 3 or lower earthquakes being mostly imperceptible and magnitude 7 causing serious damage over large areas. Intensity of shaking is measured on the modified Mercalli scale.

At the Earth's surface, earthquakes manifest themselves by shaking and sometimes displacing the ground. When a large earthquake epicenter is located offshore, the seabed sometimes suffers sufficient displacement to cause a tsunami. The shaking in earthquakes can also trigger landslides and occasionally volcanic activity.

In its most generic sense, the word earthquake is used to describe any seismic event — whether a natural phenomenon or an event caused by humans — that generates seismic waves. Earthquakes are caused mostly by rupture of geological faults, but also by volcanic activity, landslides, mine blasts, and nuclear experiments. An earthquake's point of initial rupture is called its focus or hypocenter. The term epicenter refers to the point at ground level directly above the hypocenter.

This text uses material from Wikipedia, licensed under CC BY-SA