The NOAA tsunameters at the floor of the Pacific, the DART (Deep ocean Assessment & Reporting of Tsunamis) buoys on the ocean surface and the Iridium satellites they talk to which then relay the data are hyperactive today as they report tremors and waves flowing from this morning’s 8.8 Earthquake in Chile.
NOAA’s maximum amplitude plot is shown below. I have profiled the NOAA National Hurricane Center and the analytics and technologies it uses in my upcoming book . Of course, with a hurricane they have days to track direction, with tsunamis it is often a matter of minutes - though in this case the warnings in Hawaii went out 5 hours prior to estimated arrival time.
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