Slip along the fault there, under the higher temperatures and pressures found deeper in the crust, takes on a different character: Ruptures are more plastic than brittle.
As new oceanic crust is made in the spreading centers (the story went), it cools, fractures, and
slips along faults, creating downward - dropped blocks that could be responsible for the ridge - and - valley topography.
«This motion includes a component of
slip along the fault and a component of normal motion against the fault that creates mountains.
Not exact matches
Friction
along the
fault locks the plates together until enough strain builds up to cause the plates to
slip, unleashing an earthquake.
They found that the
fault slipped by up to 19 metres
along a segment north of the epicentre, close to the city of Constitución.
What they were searching for are signs, like those seen
along the San Andreas, that indicate how much the
faults have
slipped over time and whether some of that slippage caused some of the seafloor to thrust upwards.
But if silent
slip has been relieving stress
along these
faults without scientists realizing it, then the degree of danger may actually be less than they think.
Slow
slip events are similar to earthquakes, as they involve more rapid than normal movement between two pieces of Earth's crust
along a
fault.
The study tests the method on more than 200 GPS stations that recorded slow
slips between 2005 and 2016
along the Cascadia
fault zone, which runs from northern California up to northern Vancouver Island.
In Cascadia the
slipping runs backward from the typical motion
along the
fault.
In some cases, rather than
slipping, the two sides
along a
fault rub together, which can cause a destructive, high - speed quake.
29 November 2017 — Although magnitude 6 earthquakes occur about every 25 years
along the Parkfield Segment of the San Andreas
Fault, geophysical data suggest that the seismic
slip induced by those magnitude 6 earthquakes alone does not match the long - term
slip rates on this part of the San Andreas
fault,... Continue Reading»
29 November 2017 — Although magnitude 6 earthquakes occur about every 25 years
along the Parkfield Segment of the San Andreas
Fault, geophysical data suggest that the seismic
slip induced by those magnitude 6 earthquakes alone does not match the long - term
slip rates on this part of the San Andreas
fault, researchers report November 28 in the Bulletin of the Seismological Society of America (BSSA).
The subducting plates do not
slip continuously; instead, the plates are stuck together
along the upper portion of the subduction
fault, which is referred to as «locked zone.»
The scientists found substantial increases
along the surrounding strike -
slip faults, in which abutting plates in the earth's crust — as in the San Andreas
fault — get stuck and can generate destructive shaking when they lurch free.