These data are measured by NOAA's National Tsunami Warning Center (NTWC). They have not been subjected to the National Ocean Service's quality control or quality assurance procedures, and do not meet the criteria and standards of official National Ocean Service data. Data collected by NTWC are provided relative to a station datum. Tidal datums are not available at this location. They are released for limited public use for tsunami observations. For more information on the NTWC, visit the NTWC website.

For extended periods of 1-minute data (more than 4 days) as well as quality-controlled and de-tided products, please use NOAA's National Centers for Environmental Information (NCEI) Coastal Water Level Data Inventory timeline.