MIYAKO, Japan - Modern sea walls failed to protect coastal towns from Japan's destructive tsunami last month. Although we can’t predict tsunami-causing events, there are systems to assess the risk and severity of tsunami that may occur after events have been detected. According to the proposals, the £4.6bn ($6.8bn) barrier would reach 12.5m high in some places – stretching taller than a four storey building. How did this massive wave develop. Japan to build massive sea wall to combat tsunami threat. CNN has erected a chain fence around its headquarters in Atlanta to protect against violent protests, leading some to joke that the news network had ‘built a wall’. By Elaine Kurtenbach The Associated Press. In this March 5, 2015 photo, workers build sea walls in Rikuzentakata, Iwate Prefecture, northeastern Japan. Most tsunami are caused by undersea earthquakes. It wasn’t the earthquake but the following tsunami that caused most devastation in Japan. A tsunami is a series of waves that result from the displacement of large amounts of water. April 6, 2011 / 2:50 PM / AP. When the 2004 tsunami hit, the Maldives islands were submerged for several minutes. The site consists of a castle, a middle town and a lower town confined within massive walls, “making it a unique fortified settlement”. "Japanese authorities have unveiled plans to build a giant 250-mile long sea barrier to protect its coastline from devastating tsunamis. Japan opts for massive, costly sea wall to fend off tsunamis. Jörn Lauterjung: This tsunami was triggered by an 8.9-magnitude earthquake around 250 miles (400 kilometers) from Tokyo, off the coastal city of Sendai.. March 5, 2015: A woman walks near sea walls being built in Rikuzentakata, Iwate … Associated Press. Posted March 22, 2015 6:41 pm. But in … byElaine Kurtenbach. How scientists are helping Japan rebuild after the devastating 2011 tsunami. According to scientists from the National Institute of Oceanography (NIO) in Goa, India, Dholavira, the second-largest Harappan settlement known in India offers evidence people deliberately built extremely thick protective walls to protect themselves from tsunami. Ancient stone markers warned of tsunamis. “CNN has put up a fence outside its HQ after the building was attacked during the riots in Atlanta a few weeks ago,” tweeted Town Hall journalist Julio Rosas. This picture taken by a Miyako City … Japan to build huge, costly sea wall to fend off tsunamis. The presence of extremely thick protective walls thus implies that the Dholavirans were probably aware of the magnitude of destruction caused by tsunami waves and severe storms, says the report. Those waters retreated, but rising sea levels from global … An anonymous reader points out this daunting construction plan in Japan.