DocuWatch on Facebook
Art America Britain History Science Societies War Shop
DocuWatch

The Next Megaquake

« The Man Who Moved The Mountains

The Power Of The Planet »

Description

From Wikipedia

The Next Megaquake

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 (or the related and mostly obsolete Richter magnitude) of an earthquake is conventionally reported, 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.

Other videos in channel "Planet":

A World Without Water A World Without Water After The Warming After The Warming Age Of Stupid Age Of Stupid
Antarctica Antarctica Death of the Oceans Death of the Oceans
Disaster At Death Coast Disaster At Death Coast Earth Story Earth Story Earth's Invisible Shield Earth's Invisible Shield
El Niño El Niño Europe A Natural History Europe A Natural History
Flow: For The Love Of Water Flow: For The Love Of Water Freak Wave Freak Wave Global Dimming Global Dimming
Global Weirding Global Weirding Great Discoveries - Earth Sciences Great Discoveries - Earth Sciences Greenhouse Effect - (1988) Greenhouse Effect - (1988)
Hot Planet? Hot Planet? How Earth Made Us How Earth Made Us How the Earth was Made How the Earth was Made
How the Earth Works - Lecture How the Earth Works - Lecture Invaders From The Sea Invaders From The Sea Japan Earthquake Japan Earthquake
Jetstream Jetstream Journeys from the Centre of the Earth Journeys from the Centre of the Earth Killer Algae Killer Algae
Killer Lakes Killer Lakes Last Days On Earth Last Days On Earth Lightning: Nature Strikes Back Lightning: Nature Strikes Back
Magnetic Storm Magnetic Storm Master of the Ionisphere Master of the Ionisphere Measuring the Roof of the World - (1991) Measuring the Roof of the World - (1991)
Mega Tsunami - Wave Of Destruction Mega Tsunami - Wave Of Destruction Men Of Rock Men Of Rock Miracle Planet Miracle Planet
Planet Earth - The Living Machine Planet Earth - The Living Machine Planet In Peril Planet In Peril Snowball Earth Snowball Earth
The 11th Hour The 11th Hour The Big Chill The Big Chill The Climate Wars The Climate Wars
The Core The Core The Day the Earth Nearly Died The Day the Earth Nearly Died The Day The Oceans Boiled The Day The Oceans Boiled
The Day The Wave Came The Day The Wave Came The Living Planet - The Building of the Earth The Living Planet - The Building of the Earth The Living Sea The Living Sea
The Lost World of Lake Vostok The Lost World of Lake Vostok The Man Who Moved The Mountains The Man Who Moved The Mountains The Next Megaquake The Next Megaquake
The Power Of The Planet The Power Of The Planet Volcano Hell Volcano Hell What's Killing The Sea Otters? What's Killing The Sea Otters?
Why Can't We Predict Earthquakes ? Why Can't We Predict Earthquakes ?    
Video channels
Videos in this channel
AdSense
Featured
Featured
Featured
Featured
Featured
Featured