The scale of the geological event is like something from prehistoric times, with a tsunami 200 meters--656 feet--in height. But it happened last year. Researchers warn that similar events may reoccur.
Images taken from Dickson fjord show before and after photos of the mountain peak and glacier where a large landslide triggered a tsunami.The global seismic signal was extremely unusual, and it resonated for more than a week. So it’s no surprise that it grabbed the attention of researchers around the world. In the end, it took 68 experts across 15 countries to figure out what caused the “USO,” or Unidentified Seismic Object, last September.
“The signal we describe is more like striking a single piano key for a very pure tone lasting for nine days.” Satellite images show a mountain top and glacier 30 minutes before a landslide, and 7 minutes after the landslide.Their work toward an answer was slow, Svennevig says. Even when they gained an understanding of what likely happened, they needed more time and data to prove it.
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