Tide gauge data from five stations in the Puerto Rico region showing the arrival of the tsunami associated with the Jan. 7, 2020 magnitude-6.4 earthquake. Horizontal axis is “Day of Year” in fraction of a year (DOY 7 through 8). Vertical axis on the left corresponds with sea level station data depicted by colored curves, whereas the vertical axis on the right, shown in black, corresponds tidal gauge data from Magueyes Island (magi). Dashed line represents the magnitude-6.4 Jan. 7, 2020 earthquake, with an origin time or 08:24:27 UTC. Data provided by Stuart Weinstein (NOAA).