Sentences with phrase «subduction regions»

With an evident relationship across the CMIP5 models between equatorial SSTs and upper ocean temperatures in the extra-tropical subduction regions, our analysis suggests that cold SST biases within the extra-tropical Pacific indeed translate into a cold equatorial bias via the STCs.

Not exact matches

In 1964 a region of this same tectonic clash, called the Alaska — Aleutian Subduction Zone, produced the magnitude 9.2 «Good Friday» earthquake, the second - strongest quake ever recorded.

Although the South America plate exhibits a chain of active volcanism resulting from the subduction and partial melting of the Nazca oceanic lithosphere along most of the arc, these regions of inferred shallow subduction correlate with an absence of volcanic activity.

The intermediate - depth regions of the subducting Nazca plate can be segmented into five sections based on their angle of subduction beneath the South America plate.

In these regions of «flat - slab» subduction, the Nazca plate moves horizontally for several hundred kilometers before continuing its descent into the mantle, and is shadowed by an extended zone of crustal seismicity in the overlying South America plate.

«But around 100 million years ago subduction came to a halt, resulting in the entire region being uplifted, forming the Eastern Highlands.»

Plans to build the nation's first tsunami - resistant building are unfolding in Cannon Beach, Ore., in a region that is almost identical, seismically, to the subduction zone that triggered the earthquake and tsunami in Japan last week.

Ward modeled the effects of a magnitude 9.2 earthquake in the Cascadia subduction zone — a 58,000 - square - mile region in the Pacific from British Columbia to Northern California where the Juan de Fuca plate sinks beneath the North American plate.

The broader region is vulnerable to earthquakes from multiple sources, including deep earthquakes within the subducted Juan de Fuca plate, offshore megathrust earthquakes on Cascadia subduction zone and the shallow crustal earthquakes within the North American Plate.

The Cascadia Subduction Zone off the coast of the Pacific Northwest has all the ingredients for making powerful earthquakes — and according to the geological record, the region is due for its next «big one.»

There was also a deeper slow slip event triggered on the subduction zone at 15 - 24 miles beneath the Kapiti Coast region, just west of New Zealand's capital city Wellington.

This finding has applications to the seismic hazard of these regions, as it highlights the potential for future damaging earthquakes and tsunamis at active subduction margins with no measurable recent uplift.

The challenge, said Kohler, was to develop a standard set of algorithms that could account for the different tectonic environments in each region, including the offshore subduction zone in the Pacific Northwest and the mostly on - shore faults in California.

The earthquake's epicenter had been traced to the underwater Japan Trench, a subduction zone about 40 miles east of Tohoku, the northeastern region of Japan's larger island.

If the subduction zone near Sendai can produce a great quake, then other areas with similarly old ocean crust might too, says Okal, who says that Tonga and the northeastern Caribbean are regions to look at more closely.

On Earth, as new surface material forms at mid-ocean ridges, old material is destroyed at subduction zones, which are regions where two tectonic plates converge and overlap as one is forced under the other.

The authors conclude that knowing the relative sea - level record for a coastal region on a subduction zone margin is the initial step in investigating paleoseismic history.

Faster sea floor spreading, presumably associated with more volcanic activity at subduction zones, and / or other increases in volcanic activity or geologic outgassing, or faster oxidation of exposed fossil organic C (as in shales)-- greater geologic CO2 emissions (I think another way of looking at the inorganic part is that any given region of sea floor has less time to accumulate carbonate minerals from chemical weathering, so that C reservoir could shrink while others, including the atmosphere, can grow).

Scientists have been attracted to the region because of the subduction zone located at the bottom of the ocean where the Pacific and North American tectonic plates collide, the Aleutian Trench.

The research programme will investigate the geological processes that occur at subduction zones - regions of the Earth's crust where one tectonic plate descends beneath another, generating volcanoes and earthquakes.

Since then, atmospheric CO2 declined as the Indian and Atlantic Oceans have been major depocentres for carbonate and organic sediments while subduction of carbonate - rich crust has been limited mainly to small regions near Indonesia and Central America [10], thus allowing CO2 to decline to levels as low as 170 ppm during recent glacial periods [11].

Since that time the Indian and Atlantic Oceans have been the major depocenters for carbon, with subduction of carbon - rich crust limited mainly to small regions near Indonesia and Central America [47].