It is proposed that the development of this modelling strategy could enable the estimation of critical failure thresholds for other mapped subduction asperities
where subducting and overriding plates are currently locked.
Earthquakes are common
where a subducting plate grinds against the underside of an overriding plate.
Not exact matches
SASMEX's main focus is on earthquakes originating in the subduction zone off the southern coast of Mexico,
where the Cocos tectonic plate
subducts below the North American Plate.
The Caribbean plate in the north is
subducting at a slower rate than the Nazca plate in the south,
where seismic activity is greater.
It marks the plate boundary between the
subducting Nazca plate and the South America plate,
where the oceanic crust and lithosphere of the Nazca plate begin their descent into the mantle beneath South America.
Using GPS, InSAR, gravity, seismic reflection, and geological data, Marcos Moreno and colleagues from GFZ as well as Chile show that the 2016 earthquake occurred at the deep boundary of a persistent asperity on the interface between the
subducting Nazca and overriding South American plates,
where both plates are coupled and not sliding past each other in spite of the high convergence velocity of 68 mm / year.
He explained that earthquakes aren't evenly spread within the
subducting slab, meaning there are potentially areas
where an earthquake is more or less likely to take place.
The
subducted Pacific plate beneath the Sea of Okhotsk (located between the Kamchatka Peninsula and the Russian mainland) is a lot colder than the
subducted slab
where the 1994 Bolivia earthquake occurred.
Subduction zones are areas
where one tectonic plate dives or «
subducts» beneath another plate.
Both events occurred along a subduction zone, an area
where a tectonic plate dives or «
subducts» beneath an adjacent tectonic plate.
The research, published in the journal Nature Geoscience, found that the Earth's largest flat slab, located beneath Peru,
where the oceanic Nazca Plate is being
subducted under the continental South American Plate, may be relatively weak and deforms easily.
The scientists will map the distribution of serpentinite in the
subducting plate and overlying mantle, by looking for regions
where certain seismicwaves travel more slowly than usual.
These great quakes often take place at
subducting tectonic plate boundaries,
where one plate thrusts beneath another plate, as is the case off the coast of Chile and the U.S. Pacific Northwest.
Some of the warm water would be
subducted by Atlantic Meridional Overturning Circulation / Thermohaline Circulation, some would be carried by ocean currents into the Arctic Ocean
where it would melt sea ice, and the remainder would be spun southward by the North Atlantic gyre toward the tropics so it could be warmed more by the effects of the slower - than - normal trade winds.
Therefore,
where tectonic plates collide, and one is
subducted, it must be
subducted faster as the crust shrinks.
That warmth has since been
subducted to the depths, out of the region
where probes are currently located.