Sentences with phrase «large tsunami»

In turn, the compacted sediments could boost the ability of large earthquakes to trigger large tsunamis because the sediments are able to stick and move together during earthquakes.

The new study shows the extent of flooding in selected areas along the coasts of southern Italy and Greece, if hit by large tsunamis in the region, and could help local authorities identify vulnerable areas.

«If we found more normal faults, we will be able to anticipate regions capable of generating large tsunamis,» Bécel says.

Even in Japan, the stone tablets were ignored mostly, and even they were not old enough to record the even larger tsunamis of the past, as many of them were washed away by the recent one.

The propagation of earthquakes into shallow depths is what causes large tsunamis like the one that followed the Magnitude 9.0 earthquake that struck Tohoku, Japan in 2011.

In addition to valuable insight into the seismic events as they likely occurred during the 2011 earthquake, the researchers identified the specific fault conditions necessary for ruptures to reach the seafloor and create large tsunamis.

The new evidence includes six sand sheets deposited up to 15 meters (or 50 feet) above sea level by past large tsunamis that probably were generated by great Aleutian earthquakes, and indicate a previously unknown tsunami source that poses a new hazard to the Pacific basin.

Warning times for tsunamis generated close to shore need to reduced, and more basic science is needed to better understand «stealth earthquakes,» which produce larger tsunamis but with less shaking than expected.

Thousands of lives were saved by the «Large Tsunami Warning» announcements of the Japan Meteorological Agency that followed the Tohoku - Oki earthquake of 11 March 2011.

Accounting for this lateral motion could explain why some earthquakes generate large tsunamis while others don't, the researchers report in a paper to be published in the Journal

More than half of the energy for the unexpectedly large tsunami that devastated Japan in 2011 (SN Online: 6/16/11) originated from the horizontal movement of the seafloor, the researchers estimate.

Stein argues that scientific errors in movies, from impossibly large tsunamis to caverns in Earth's mantle, can be used to teach scientific lessons and foster a healthy sense of skepticism.

About 10 % of all tsunamis worldwide happen in the Mediterranean, with on average, one large tsunami happening in the region once a century.

«The models result in large tsunami amplitudes northward and eastward of the fault due to the shape of the coastline and seafloor,» Ryan explained.

New data for frequent large tsunamis at a remote island near Dutch Harbor, Alaska provides geological evidence to aid tsunami hazard preparedness efforts around the Pacific Rim.

These geological observations indicate large tsunamis in the eastern Aleutians have recurred every 300 - 340 years on average, and provide additional field - based information that is relevant to new tsunami evacuation zone maps for Hawaii.

«We generally have just considered the largest possible earthquake, but we seldom consider underwater landslides as an additional source,» even though large tsunamis in 1998 in Papua New Guinea and in 1946 in the Aleutian Islands were found to be generated by a combination of earthquakes and underwater landslides.

Sumatra's 2004 earthquake should have been a wake - up call; giant earthquakes can occur on any subduction zone, and such events will likely be accompanied by very large tsunamis.

Despite the best safety record of any industry in the country, and the critical role nuclear plays in fueling German industry, Germany's past experience with large tsunamis was just too horrific to ignore.

Quakes smaller than magnitude 8 probably don't generate elastogravity signals large enough to be measured by current instruments, but such temblors are also not as prone to trigger large tsunamis, the researchers note.

Using hand - driven cores, augers, and shovels to reveal the sediments blanketing a lowland facing the Pacific Ocean, and using radiocarbon dating to estimate the times of sand sheet deposition, scientists established a geologic history of past large tsunamis.

The scientists also found hints of even larger tsunamis that occurred in the Caribbean in prehistoric times.

The discovery that there had been such a large tsunami is surprising, says Seth Stein, a geophysicist at Northwestern University in Evanston, Ill..

The team used ground - penetrating radar (GPR) to search for physical evidence of a large tsunami that pounded the Northern California coast near Crescent City some 900 years ago.

Geologic records show that these large tsunamis hit the northwestern United States (Northern California through Washington state) every 300 to 500 years.

Large tsunamis could have carried sediment onto the land and obscured parts of the martian ocean's shoreline, according to a study published today in Scientific Reports.

So far they have no way of computing the risk of an undersea landslide there, and thus the possibility of a large tsunami submerging the mid-Atlantic seaboard — although it's surely less imminent than the next major hurricane.

Before 2011, Japan was considered to be the best prepared nation on earth to withstand a large tsunami on its coasts, with structures specifically designed to afford sufficient protection to coastal settlements and critical infrastructure.

While the history books report several fatal Caribbean tsunamis in the past, Grindlay has found evidence that even larger tsunamis, triggered by underwater landslides, struck the region before 1492.

If correctly interpreted, they could have offered a warning that a large tsunami was on the way.

«Fortunately, these catastrophic earthquakes don't happen frequently, but we can input these site specific characteristics into computer models — such as those made possible with the CEES cluster — in the hopes of identifying acoustic signatures that indicates whether or not an earthquake has generated a large tsunami.»

Stanford scientists have identified key acoustic characteristics of the 2011 Japan earthquake that indicated it would cause a large tsunami.

Because the last one came in the ninth century, the researchers wrote, «the possibility of a large tsunami striking the Sendai plain is high».

The youngest sand sheet and modern drift logs stranded as far as 805 meters, or half a mile, inland and 18 meters (or 60 feet) above sea level record a large tsunami triggered by the magnitude 8.6 Andreanof Islands earthquake in 1957.

Recent fieldwork in Alaska's Aleutian Islands suggests that a presently «creeping» section of the Aleutian Subduction Zone fault could potentially generate an earthquake great enough to send a large tsunami across the Pacific to Hawaii.

In 2007, in Peru, a major earthquake began to happen, then essentially stopped for 60 seconds before picking up again and eventually generating a large tsunami.

Now one could argue that an impact of that sort, onto either the open waters of the St. Lawrence or the Laurentide ice sheet, could have vaporized a good deal of water and ice, thus creating a large tsunami that funneled up the St. Lawrence and then broke through to glacial Lake Vermont, and then set off a chain of events that lead to the draining of Lake Vermont and Lake Agassiz, and that could very well satisfy the proxy evidence in the Younger Dryas boundary layer.

Such a rehearsal is vital there; large tsunamis are known to strike the Mediterranean once or twice every century.

In hindsight it appears impossible to believe that nuclear power stations were located on a shoreline without recognizing the engineering difficulties attending prolonged immersion by a large tsunami.

It is secure against flooding, fire, storm surge and anything but the largest tsunamis.

Instead, we hypothesized that these deposits were the result of a large tsunami that impacted the Bermuda island platform during the mid-Pleistocene.