A 2015 United Nations report estimated that every year, an average of 60,000 people and $4 billion USD in assets are exposed to the global tsunami hazard, which can be triggered by certain types of undersea earthquakes or volcanic eruptions. Over a number of decades, various countries have deployed dedicated tsunami warning systems, like floating buoys, to augment land-based seismic detectors.
Seismic waves travel 20 to 30 times faster through the earth&rsquo…
