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Fault (geology)


In geology, a fault is a planar fracture or discontinuity in a volume of rock, across which there ... When this happens, stress builds up in rocks and when it reaches a level that exceeds the strain...

Exactly What Happens to the Ground at a Fault Line ...


May 13, 2010 ... When a lot of slippage happens all at once, the result is a major ... Powerful quakes have lasting impacts on a fault zone, creating new fractures ...

Earthquake Faults - IRIS


happens on a discrete area of the fault plane that ... fault,v much like what happens .... vertical as in a strike slip fault or inclined like a subduction zone fault.

Fault Lines: Facts About Cracks in the Earth - Live Science


Sep 25, 2014 ... These faults are commonly found in collisions zones, where tectonic plates push up mountain ... What Ever Happened to the Richter Scale?

Earthquake Glossary - locked fault

earthquake.usgs.gov/learn/glossary/?term=locked fault

locked fault. A locked fault is a fault that is not slipping because frictional resistance on the fault is greater than the shear stress across the fault (it is stuck).

The San Andreas Fault - USGS Publications Repository


Jan 11, 2013 ... Many smaller faults branch from and join the San Andreas fault zone. Almost any road cut in the zone shows a myriad of small fractures, fault ...

Geography4Kids.com: Earth Structure: Faulting


Folding happens when two pieces of a plate come together and push against each other. ... They run up and down the plate in an area called a fault zone.

Earthquakes: Paper Flash Cards


Q2-5: List what can happen to a seismic wave as it moves from one material to ... would a seismologist use seismographs to study a small part of a fault zone?

Earthquakes & Earth's Interior - Tulane University


Sep 24, 2015 ... What happens during an earthquake? .... Once a fault forms, it becomes a zone of weakness in the crust, and so long as the tectonic stresses ...

What Is a Geologic Fault? - Windows to the Universe


Jan 19, 2010 ... Normal faults happen in areas where the rocks are pulling apart (tensile forces) so that the ... These clusters of faults are called fault zones.

More Info

Earthquakes and faults - Putting Down Roots in Earthquake Country


This section describes how earthquakes happen and how they are measured. ... A fault is a thin zone of crushed rock separating blocks of the earth's crust.

Faults and Faulting - Penn State Earthquake Seismology


Not all faults intersect Earth's surface, and most earthquakes do no rupture the surface. ... Structure of an exposed section of a vertical strike-slip fault zone (after  ...

The New Madrid Earthquake That Will Divide The United States In ...


Feb 26, 2015 ... This fault zone is six times larger than the San Andreas fault zone in .... happen if a major earthquake did strike the New Madrid fault zone?