Sentences with phrase «submarine landslides»

Yet, by studying a 43 million - year record of submarine landslide deposits from sediment cores, this research reveals that submarine volcanism can generate landslides many times larger than those recorded above the sea.

It used measurements from 195 core samples containing submarine landslide deposits caused by subduction zone earthquakes, instead of only about a dozen such samples in past research.

The cores provided evidence for 43 million - years of past submarine landslides in the Canary Islands, making it the longest unbroken landslide record to date.

Although this is one of the best - mapped continental margins in the world, significant gaps still remain along the upper slope and shelf where potentially dangerous submarine landslides might occur.

«The evaluation of submarine landslides as potential tsunami sources along the U.S. East Coast and the Gulf of Mexico and the investigation of submarine canyon systems in the Atlantic are ongoing projects,» Chaytor said.

«There is a relatively low chance that a similar submarine landslide with the potential to cause a tsunami of up to three metres or more would happen today,» Associate Professor Webster said.

«The discovery of the Viper Slide is the first solid evidence that submarine landslides existed on the Great Barrier Reef,» said Dr Robin Beaman from James Cook University — a member of the expedition that mapped the slide.

Large volume submarine landslides, triggered by the inception and growth of submarine volcanos, represent among the largest mass movements of sediment on Earth's surface.

Thus, scientists turn to the geologic record to determine the recurrence interval of ancient quakes by carbon - dating organic material in sheets of tsunami debris washed far inland or in the layered remnants of submarine landslides smothering the floors of undersea canyons.

Description of the ancient submarine landslide, the «Storegga slide» and associated tsunami.

«When the ice is lost, the earth's crust bounces back up again and that triggers earthquakes, which trigger submarine landslides, which cause tsunamis,» McGuire told Reuters.

It revealed the globe - encircling volcanic mid-ocean ridge system, earthquake - producing boundaries of crustal plates, drowned shorelines, and submarine landslide deposits.

A number of submarine landslides, some previously unknown, were either partly or completely mapped.

«Having accurate information on the number of submarine landslides, in addition to their characteristics such as their size and the water depth they occur in, the style in which they fail, and the properties of the soil and rock involved in the landslide, are important in determining whether or not they might have generated a tsunami,» Chaytor said.

The research team has named the submarine landslide the Viper Slide because of its location adjacent to Viper Reef.

When that happens, it doesn't take much — a submarine landslide or a slight warming of the bottom water — to release potentially catastrophic burps.

Details of the discovery of the submarine landslide and tsunami were published this week in Marine Geology.

Submarine landslides, like the one at Storegga, seem to have occurred frequently as the last ice sheets receded, as well as at the end of previous glaciations.

Tsunamis triggered by point - source events such as volcanic collapses or submarine landslides are not likely to have as wide an impact because the waves appear to dissipate quickly with distance.

But he emphatically agrees with the authors of the Science Advances paper that the threat posed by collapsing volcanic slope and submarine landslides has been overlooked in the tsunami hazard field.

A submarine landslide might release a Gigaton of carbon as methane (Archer, 2007), but the radiative effect of that would be small, about equal in magnitude (but opposite in sign) to the radiative forcing from a volcanic eruption.

A sudden release of methane hydrate, for example, as a result of a submarine landslide (e.g., Bryn et al, 2005), might allow methane to be released to the atmosphere, but the amounts released from an individual landslide is expected to be small (RealClimate).

«As long as the scientists in the Siberian Arctic are not able to report very strong increases in submarine landslides and slope failures, I wouldn't expect that the release into the atmosphere is so severe that it is really very serious at the moment,» Schwark added.

Links between methane hydrates and submarine landslides are explored.

The largest submarine landslide known is off the coast of Norway, called Storegga [Bryn et al., 2005; Mienert et al., 2005].