Japan's century of efforts to tame earthquakes

Takashi Hosoda was in a Tokyo skyscraper when the 9.0 magnitude quake struck on March 11, 2011, but the trained architect was "not particularly worried" as modern Japanese buildings are designed to protect their occupants.


Proton using VPN sign-ups to spot attacks on democracy

Internet privacy company Proton announced Wednesday a new VPN Observatory, tracking demand for its services to detect attacks on free speech in countries like Russia and Iran before they hit the headlines.


Understanding the catastrophic impact of the earthquakes in Turkey

When a 7.8 magnitude earthquake struck southeastern Turkey in the early morning hours of Feb. 6, it was identified as the most powerful seismic incident to hit the country since 1939. When a 7.6 magnitude earthquake was triggered ...

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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