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tsunami_energy (MapServer)

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Service Description: NOAA's Pacific Tsunami Warning Center (PTWC) has modeled historical tsunamis using the Real-Time Forecasting of Tsunamis (RIFT) forecast model (Wang et al., 2012), the same tool that it uses to determine tsunami hazards in real time for any tsunami today. The RIFT model takes earthquake information as input and calculates how the tsunami waves move through the world’s oceans, predicting their speed, wavelength, and amplitude.

This map displays an "energy map" for selected historical tsunami events, made available by Nathan Becker (NOAA/PTWC). Each energy map is a mathematical surface representing the maximum rise in sea-level on the open ocean caused by the tsunami, a pattern that indicates that the kinetic energy of the tsunami was not distributed evenly across the oceans but instead forms a highly directional "beam" such that the tsunami was far more severe in the middle of the "beam" of energy than on its sides. This pattern also generally correlates to the coastal impacts, but does not necessarily match the tsunami wave heights measured at the coastline.

The tsunami amplitudes are displayed using this color scale:
Tsunami RIFT legend

Selected historical tsunami events are included as separate layers:
Web links:
Pacific Tsunami Warning Center (PTWC)
RIFT Tsunami Forecast Animations from PTWC

Map Name: Layers


All Layers and Tables

Dynamic Legend

Dynamic All Layers

Layers: Description:

Copyright Text: NOAA Pacific Tsunami Warning Center (PTWC), National Centers for Environmental Information (NCEI)

Spatial Reference: 4326  (4326)

Single Fused Map Cache: false

Initial Extent: Full Extent: Units: esriDecimalDegrees


Document Info: Supports Dynamic Layers: true

MaxRecordCount: 1000

MaxImageHeight: 4096

MaxImageWidth: 4096

Supported Query Formats: JSON, AMF, geoJSON

Min Scale: 0

Max Scale: 0

Supports Datum Transformation: true

Child Resources:   Info   Dynamic Layer

Supported Operations:   Export Map   Identify   QueryDomains   Find   Return Updates