The graphics display forecast results, showing qualitative and quantitative information about the tsunami, including tsunami wave interaction with ocean floor bathymetric features, and neighboring coastlines. Tsunami model amplitude information is shown color-coded on top of blue-shaded sea floor bathymetry. The tsunami waves first arrived at Pago Pago, American Samoa, (approximately 250 km from earthquake epicenter) earlier than other tide gages, at 18:08 UTC, about 20 minutes after the earthquake.
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