that's the way that he plays for germany at the euros live will have the final say on woodstock. this is live on but up next a documentary called tsunamis danger from the depths you can also find much more news and analysis was video on a website that is j w dot com i mean i'm a homage thanks for watching a bike. play. station . expect. to discover the secret language of oil. company research team to the pacific to. whales starts to slow.

tsunamis deadly waves that have the power to destroy entire cities in a matter of moments. there was little public awareness about them until december 26th 2004. that was the day a gigantic tsunami in the indian ocean killed more than 230000 people images illustrating the pools of these natural phenomenon shocked the world. 7 years later in 2011 a nuclear power plant in fukushima japan exploded after being engulfed by an earthquake generated tsunami. since these tragedies scientists rushed to the scene redoubling efforts to determine what causes these killer waves. because that knowledge. can save lives it's clear that tsunamis can strike any region of the

planet urbanization has made coastal communities even more vulnerable. than tsunami research protects them. did. it. move. on friday september 28th 2018 an earthquake followed by a tsunami devastated an area of the bay of palu on the indonesian island of slow way sea. within minutes 4000 people lost their lives 79000 others had to be evacuated how could this new design aster in indonesia

occur after the devastating 2004 tsunami 2 tsunami specialists were commissioned by unesco in the indonesian authorities to investigate cost us in our lockers at the university of southern california and herman fritz of the georgia institute of technology have arrived to conduct field research. quite impressive to see the devastation. there now 3 weeks after their end. everything can i say right important to come up as quickly as possible or at least once to emergencies over because our borders in this area already so a lot of evidence is very lost. the researches will be combing the debris for traces of the wave time is of the essence cleanup operations have already arranged valuable evidence and the monsoon rains a jew to start soon. working

as a tsunami scientist is very much like being a detective on a crime scene there's that multiple murders have taken place. and you really have to piece like in the bottle this sequence of events they've been tsunami hit 1st and this made the houses collapsed or where they collapsed because of the earthquake or tsunami from this the what were the people doing why is it that some people died and some people did know. the 2 researches want to determine how the disaster on folded big goal to trace the tsunami back to the events of the tree get the way. his goes to meet survivors in the small fishing town of one. when the wave heat pump do look tif was on his boat 100 meters from the shoal. water and then. get off

the boat. very young. when the 1st wave came in there was a big trauma and when i'm on deck and we're going to go up up and you for the tremors on the boat that i hear oh yes the whole boat was rocking i just the water level had dropped and the boat had run aground on what they could do if they stayed with the boat. did you stay on the boat you did up on the dresser. i got held on to the mast yeah ok and then i saw the way of approaching in the distance you jumped up scarlett was very fast so. it reached the boat in no time at all and pushed us on to land. i must put up roughly how high was a. fair could see my house. was almost at the same height as the boat how does the

garden what was your house over there is the way it was about 5 to 6 metres higher as high as my house if you did you know. cause to sue no law because he's puzzled how could a 5 metre high wave have crashed onto the shore here in a bank that up until now had not been seen as a tsunami hazards on. 20 kilometers south of one need herman fritz he's conducting research in part. tucked away at the back of the bank the town is home to 350000 residents thousands of people lost their lives here. accompanied by 2 indonesian colleagues come in fritz drives to the parking lot of the shopping center overlooking the bank he's investigation into the dynamics of the wave relies heavily on videos from mobile

phones this is the exact spot where you saw on the feed you so you can see the billboard yet. another way of telling people running away people running away. and that's the 2nd was going right over their eyes. now we can basically see how high the water is almost on top of the billboard. the waves reached a height of more than 4 metres. to determine the kools of the tsunami hermann fritz 1st needs to create a computer model of the devastating wave for this he has to determine its height at

different points in the city and measure how far it spread inland i tried to some detailed survey years to begin to try to get it to 3 d. stamped and the purpose of that is to figure 3 d. space is the lidar stands all the point and we can see how the wave goes through it so if you measure how high the wave reason every given instance and how fast that wave is moving across the through the houses washing away the houses and across the street and. hooman fritz follows the waves traces to flooding the parking lot its whips deep into the sea maintenance of the force of the wave can be found in these most located just 100 meters from the shoal. that's why we have this grail here and we see this graph that they bring inside so we know that the tsunami was at least to this height of this rock and then up here we see the actual primary tsunami lying which is this one right here and we can

also see in the window if you look at the blue sky we actually see a model going through there and then we look at that over here we also see the mud line coming around coming around coming around so the tsunami is coming pretty much at the height of my head through this mosque. and that's also very difficult to hide already because usually when the water is to this height you cannot stand any more you will be thrown to the ground by the water so can be difficult to survive. after 3 days of field work the 2 american researches and their indonesian colleagues can now produce their 1st simulation of the tsunami that hit the bay of palu. they established that the strongest wave cut a path $300.00 metres inland but cost us in a lucky and herman fritz are only at the start of their investigation they now have

to identify the events that triggered the deadly wave and find out how it could have swept into the bay. soon means the port nummy the way the waves the destroy the pool water. these words now in universal use dates from the 17th century it comes from the place on the planet most frequently affected by tsunamis japan. it was coined by fishermen when returning to shore on a storm free day they discovered the waves had leveled their villages. act the last tsunami to hit japan caused the fukushima nuclear disaster in 2011 it was triggered by a sea quake measuring 9 point one on the richter scale. the way killed more than

18000 people at tsunami now or can cause a tsunami has no meteorological cause that's the primary cause of tsunamis are earthquakes and sea quakes. the vast majority of tsunamis are generated by sea quakes which in turn are triggered by the earth's tectonic activity. the earth's crust is composed of several large plates the movement of magma pushes them against one another a few millimeters. to a few centimeters a year the oceanic plates slide beneath the continental plates creating subduction zones. friction between the plates can cause deformation of the continental plate which accumulates a gigantic amount of energy when these energy is released it can cause a huge undersea earthquake.

they've got the earthquake suddenly puts all the water in motion. at a depth of 4 kilometers we have 4000 meters of water is moving at the speed of a passenger plane. or the wave slows down near the coast but increases in size of injuries on that creates waves like we saw in 201120 to 30 meters high met. all the meanings. you cannot separate earth great science and tsunami science. longer the ration of the earth great it's a very good indication a strong. basically it's like a zipper if you have a smaller spray it's this short rupture area and that means the ration sure if it's a bigger is craig lapsley madra. maggots in. and basically have

a very long zipper that means the shake in vogue go on for several minutes just crossed that i. no. longer and stronger an undersea quake the more powerful the tsunami a treat is as in the indian ocean sea quake of december 26th. 2000 and full. of full located 100 kilometers of banda on the indonesian island of sumatra ruptured along a length of 1200 kilometers the massive 9 point one magnitude undersea quake lasted more than 5 minutes. within 15 minutes the 1st waves up to 35 meters high smashed into sumatra while other

large waves rippled across the indian ocean in all 230000 people lost their lives the waves advance was caption for the 1st time on video by hundreds of people caught up in the disaster. the world was shocked by this devastating show of natural force a force little understood at the time. for scientists it was a wake up call energizing research into tsunamis then still in its infancy. however. since 2008 unesco has maintained a global tsunami tracker it's a record of tsunami occurrences over the past 3 millennia. to date researchers have identified $1200.00 the least destructive are in white the most deadly in red

each of these dots represents a potential danger for the future 70 percent of tsunamis located along the pacific ring of fire where most of the earth's subduction zones are located. in carluke costus in alaska sent herman fritz a continuing their research at tsunami early warning system was set up here after the 2004 disaster so why were there so many victims in 2018. you know if there are a lot of vendors here selling food. it was really busy 1st we heard a rumble. get all. the people started screaming the water's rising. the so i witness says the crowds in the roads near the beach were caught totally off guard by the way no warning sounded here. our

investigation continues at the tsunami monitoring center in the indonesian capital jakarta. this control tower monitors seismic activity across indonesia including the bay of power loom. seismologists here can detect any undersea earthquake in real time advanced algorithms allow them to simulate the formation of a tsunami and warn coastal communities before the 1st wave hits since its introduction in 2008 the system has issued 22 alerts saving countless lives why then did palu fail to receive a warning on september 28th 2018. qian put in a scene he was the seismologist on duty that night i guess that. the earthquake in

palo registered a magnitude of 7 for 2 minutes then just afterward the magnitude rose to 7.7. i instantly ran to the top table where we simulate tsunamis the houses on top modeling tsunami the center in jakarta registered an earthquake 80 kilometers north of palm bay early in the evening. and the epicenter is here. and here's palo. according to the simulation the tsunami risk posed by the surface quake was only moderate nevertheless an alert was treated within the prescribe time limit 5 minutes after the earthquake. so one went wrong.

last assume the lurkers will discover the answer with the help of 2 private surveillance cameras. friday september 28th 6 o 2 pm the earthquake hits the bay of power loom it lasts longer than 2 minutes. how did you experience the earthquake it was incredible you couldn't stand up impossible i was there under camera 2 and i was hanging on to the gate and it calmed down and i went out to call she's my cut off of your grocery show clothes for water for her to try. out that they've always said a base a bag a doesn't have tsunamis. that it's in the open sea where there occur you know it happened here and it said that. these images provide the researches with

evidence on the chronology of events the time on the c.c.t.v. footage reveals that barely 2 minutes elapsed between the end of the earthquake and the onset of the tsunami. such a rapid succession had never been recorded before. the tsunami warning issued in jakarta when town after the wave hit palu when all of its communication systems were already down. what is very alarming to me is that here the earthquake triggered the tsunami very quickly so we need to understand how this happens and also what is the timing

how quickly after the earthquake hits the tsunami. warning to the jakarta centers simulations it should have taken a wave generated near the epicenter 80 kilometers north of the bay about 15 minutes to reach palu. but how was it possible for this wave to advance with such speed and full stop on the bay of palu. to find answers the research is take to the air. it's extremely important discovery bird's eye view it's just being up there and we've all got a lousy scene how history will. consume the extent of. the scientists are struck by what they see their alternating areas of devastation and

intactness but that's not all once you get outside of the bay the wave disappears very quickly and you're looking ever very beautiful indonesian beaches saturday hours to can find the zone where to look for further for the sources to inside the bay. if the wave that devastated palu had formed out in the open sea the entire coast would have been affected. him and fritz and cost us in a lock is down to the deadly wave we. generated at the epi center identified by the jakarta warning center they believe the source of the tsunami must have lain inside the bank itself. fritz and he's indonesian colleague. returned to the west coast to gauge how one tsunami could have a region and to be in this sheltered area. paris city has received news footage that was filmed by. the bar to stay over there. so you can

see all of these events and then this is when they started just last night. yeah a local landslide go seismic triggered by the earthquake you have a small semi-circular wave that you can even see the video so i think this is going to be a localized impact of this landslide tsunami of a lot of aluminum what do you think once you shake it in the world. for whom and for it's the low intensity of these 1st wave suggests it was triggered by a coastal landslide but that alone doesn't explain what cools the tsunami that devastated the bank here we have evidence because we have a coastal scar ok so the scar actually is along the shoreline and went into the ocean and so we have a coastal landslide i don't think there's localized tsunamis big enough to be the main source of the tsunami that wiped away. on the other side of the bay.

surveying the entire bank researches discover several similar landslides all of them could have triggered me need tsunamis but it's only when the team looks further inland that it finds the missing piece of the puzzle. and they want to look this is remarkable this is the trench. trimmers opened it and closed it and opened it again. a few 100 metres further on a 2nd witness points out the extent of the destruction was i wanted i mean the entire row of houses collapsed on all of the houses collapsed at the same time from south to north as you can see by the slope of that house there. a deep full line

opened up cutscene clear through the town causing the buildings to collapse it continues on into the bank for many more kilometers. finally researches have the answer it is these fault line that cools the palu tsunami. after 5 days out in the field and months of data analysis the sequence of events has at last been pieced together on september 28th 2018 at 6 o 2 pm a $7.00 magnitude earthquake struck 80 kilometers north of palm. the epicenter correctly identified by the tsunami monitoring center in jakarta did not directly trigger the tsunami the seismic waves travel through the earth's crust at the extremely high speed of 900 kilometers per hour generating a fold that opened up across the entire bank that triggered landslides all along the coast which in turn generated

a series of mini tsunamis the energy of all these mini toonami he's accumulated in the depression of the bank combining to form a powerful wave that swept across the town hermann fritz and cost us the investigation has come to an end there reconstruction of the bay of palu tsunami will help improve warning systems all over the world we used to think that tsunamis only areas where you have subduction zones we now know just like what's happened here that tsunami is going to strike. any place where you're going to have an earthquake we are very concerned about this because similar earthquakes. in seattle could take place in southern california and they could take place in the . big race in the mediterranean.

watch walls of water water winds what thunder what a horrible earthquake water frightening sound of the sea and the howling of the great people. these words by the italian poet petrarch describe a strange storm over the city of naples in the 14th century. 700 years later vulcanologist maori a rosie was intrigued by petra its description rosie has worked on naples emergency plan in case mount vesuvius erupts most tsunamis are generated by sea quakes and fault lines but they can also be triggered by volcanic eruptions if. you want to build an audio request of a truck witnessed an exceptional phenomenon that struck the city of make us normal . man he was asleep not far from the port when he heard such loud strange noises that he thought it was an earthquake there are

a lot of found that only 40 but that patrick rushed to the harbor like so many other people. and saw with his own eyes that it had been completely devastated. us in caribbean neither of us that's all. aside from his descriptions of the destruction petra also wrote of hundreds of dead and dozens of sunken ships to mount royal rosie it's obvious that the strange storm was a tsunami. that struck out a level car no people think at that time petra could not have known that it was a tsunami because it was an unknown phenomenon in the middle ages arguably of the hour. today we are certain it was a tsunami. now known. to avoid a repeat of the catastrophe the vulcanologist has been searching for the cools of the tsunami that wrecked harbor in 1343 days no. record of a 14th century eruption of mount vesuvius in the gulf of naples. so mount

rosie has focused on another volcano located 200 kilometers from naples stromboli he's one of the most active in the region. in 2002 an eruption caused a flank of the mountain to collapse into the sea a 10 metre high tidal wave removed the island. the way to spread across the terrain in sea and much weakened reach the bay of naples. far more powerful eruption of stromboli have triggered the tsunami described by petrarch 700 years ago. above the village of san vincenzo on the slopes of the volcano archaeologists are a levy is excavating the remains of a small church she's provided now rosie with his 1st clues.

evan when i meant that the magical we knew that a dramatic event led to the sudden collapse of the building probably a powerful earthquake because we found large blocks of stone inside on the church floor. up everything. in order to date stromboli past activity archeologists examined 3 skeletons found in the remains of the church. discovered it was in a grave that that was jog through the layer of collapsed tiles that fell down when the church collapsed so this person was definitely a witness of the catastrophe possibly a victim or possibly a survivor. the skeleton has been dated by carbon 14 in the middle decades of the 14th century. the date of the earthquake that shook the island of stromboli coincides with the tsunami disaster described by petrarch in the bay of naples. when the church collapsed it was not rebuilt which is surprising and indicates

a major change in human occupation at this location it is likely that the island was abandoned until the 1600s. the event was so traumatic that the island of stromboli remained uninhabited for 10 generations and more than 200 years . following these revelations from our own rules he began his own excavations he hopes to find clues linking the activity of the volcano to the tsunami described by petrarch in 1343. more than 4 meters underground the vulcanologist finally discovered an intriguing mix of sedimentary deposits. for the positive tsunami and this tsunami deposit is by far the largest we found. and we dated 821350 as

evidenced by the materials and. their lack of touch 30000 for. look at the size of these perfectly round pebble stones they must have come from the beach. green the presence of such a large sized elements proof of the tsunami was extraordinarily powerful. the idea for the vulcanologist it all makes since the powerful wave that flushed these large pebbles 200 meters inland from the beach occurred at precisely the same time as the earthquake that destroyed the small island church there is a clear link between the eruption of the volcano and the tsunami. it's on the scene pressie flank that all the volcanic material ejected by stromboli accumulates 700 years ago an eruption may well have sparked a landslide on the show. that. would have hold many millions of tons of accumulated

debris into the sea triggering the tsunami that reached the bay of naples but as we would maintain a strong body given strong police current activity we believe the load of debris presently accumulated on the shuttle for kong was comparable to levels of the time of the tsunami described by petrarch. from our own rosie the landslide cools by the 2019 eruption was just a harbinger of a much more serious disaster to come and share a dell full quote he says could collapse into the sea at any moment. the island of stromboli is under 24 hour surveillance to alert authorities residents and tourists in the event of danger. but what consequences would it tsunami have on a city the size of naples in

a bottle of the sweet docket you see our full tsunami also probably here and these people are completely unaware that a tsunami from from bali could hit naples. i mean. one of the phenomena. in a case of rare natural phenomena well it's too late then people tend to believe that there is no imminent danger since it still may keep the socio. computer generated model tracks the cools of the $1343.00 tsunami gives an idea of what could be in store for naples. florida but all this will all come in time you know the give or take under 30 minutes for the tsunami to reach the gulf of naples from stromboli for the an hour early in. the devastation would be unimaginable committee really for the markets given the hour when all the boats in the harbor behind me would be hurled onto the streets being the current bill is that it. the water would gush into the subway and drown all of the passengers.

in the busy streets would be submerged. it would be apocalyptic. scene but that's exactly what happens without an early warning system of these. earthquakes landslides volcanic eruptions all of these natural phenomena can triggered tsunamis. research carried out over the last 15 years has provided a better understanding of the threat it's also helped perfect warning systems and better adapt them to the specifics of each risk zone. the technology is most advanced in japan a country at the forefront of tsunami science. research is here feel they know

exactly what will course the next disaster. these images are from a government awareness raising campaign broadcast in march 2889 to prepare people for a tsunami that scientists say has an 80 percent probability of occurring within the next 3 decades. the film explains how people should react but also predicts the likely scale of the disaster we 350000 victims and infrastructural damage impacting the japanese economy for at least 20 years because a rupture of the unkind trough a 900 kilometer long ocean floor trench along japan's west coast. troth the threat of the 9th i trust is very specific because all the economic centers of japan whether tokyo or soka we're not going to are in all. areas.

today there is no technology that can predict earthquakes but japanese scientists have to develop a monitoring system to warn the public the moment a seismic wave is registered. he says i need to be able to detect movements as soon as possible and then issue a warning if that's what the darn it system does just right outside that they have or suckers like. the don't need system is the most sophisticated seismic detector in the world 29 small underwater observatories equipped with precious sensors and seismometers and excel or all motors are installed directly on the full line off the coast of osaka it issues an alert with the very 1st tremor of the tsunami. it would take 3 to 5 minutes for the tsunami to reach the 1st cities with waves 20 to 30 meters high they sweep into osaka bay and flood parts of our soccer incog.

the artificial islands would be the worst hit with waves of 3 to 5 meters after 30 to 45 minutes. to develop the fictive evacuation plans and tested protective walls the disaster prevention center at kyoto university simulates the effects of an earthquake you know paul. we are almost certain we'd be dealing with a magnitude 9 earthquake. and that it would cause a tsunami. warning us. here at ease she has modeled the arrival of a wave with an average height of 20 meters that's the equivalent of a 6 story building in a city directly facing the name control. seawalls would weaken the waves the impact the protect. these barriers would quickly become submerged under several meters of

water. the simulations are supplemented by computer models they were allowed to pursue yet he wrote each team to predict the path that tsunami would take in tokyo bang. ovo its 5 kilometers inland the district around the olympic stadium could be buried under a 9 metre high wave. of where i got the use simulations are carried out to identify hazardous locations. though for example a road that would flood quickly is not suitable as an evacuation route. to the entrances to many buildings would be blocked by water so they offer no shelter there is no day you get to your idol. kyoto university has used the simulations to create an interactive evacuation plan in an emergency an app shows

the progression of the waves and identifies the nearest safe zones. one of the midst of some of that if we get information on our cell phones and on the internet as their city television stations also broadcast warnings with instructions on what to do to get to safety and security. saving lives is key but scientists also want to minimize structural damage. the tsunami of 2011 once again showed that the areas are extremely dangerous places to be cheering at tsunami which transforms ships into giant projectiles. or hero turned to her she moto of kobe university the harbor is a priority evacuation zone. that's the state of

osaka bay is very busy during the day. at any given time there are 30 to 50 boat sailing there. and we have no guarantee that in the event of a tsunami a situation that many have never experienced everyone would keep their cool and the ships would have accurate one after another in an orderly fashion. and that's why we're developing an intelligence system to evacuate ships automatically. despite technological advances japan is seemingly living on borrowed time with sucka a city of 8000000 inhabitants and the country's 2nd largest economic center is built on low lying flat lands it's surrounded by hundreds of kilometers of protective walls. there of a 2011 earthquake weakened all the walls. parts of the barrier collapsed so it

wasn't offering effective protection or for the tsunami arrived yes no it is a pretty. cool. to date even the most sophisticated technologies cannot predict earthquakes these artificial islands have apartment blocks shopping centers and petrochemical plants. public education and emergency management can reduce the number of fatalities in the event of a tsunami. we often feel like we've tainted nature but time and again nature proves us wrong. around the world tsunami research has made great strides but every new design step puts the technologies devised to protect us to a new test. if we build the bar

blocks of hospitals public buildings houses in areas where there's a fire house or i've been layers and layers of that every living and with bar what we're finding out around the world is that our reading ability for saucers greasing . waterfront living has an enduring appeal but the unchecked urbanization of coastal communities is a recipe for disaster. even with increasingly sophisticated technologies and early warning systems applying common sense to our understanding of nature he's more important than ever. and we say this worldwide if you're near the coast and you feel i mean the ground shaking that's loss of more than 15 seconds move away from the beach.

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true for security more freedom and more dignity have their hopes been fulfilled 10 years ago after the arab spring. arab only and starts june 7th on d w. this is d w news and these are our top stories there was further rockets fired over the skies of gaza and they choose day the latest exchange in the ongoing conflict between israel and hamas militants it comes a day off for demonstrations by palestinians across the occupied territories and israel much of the population went on strike to protest israel's bombardment of gaza at least 225 people mostly palestinians have been killed in 9 days of fighting .