Definitions
A quantitative assessment that describes the probabilities of exceeding a given tsunami wave height at a given offshore location at a specified water depth. The probability can also be expressed as return period.
A line graph that shows the probability (or return period) for exceeding a given wave height for a single hazard point.
The vertical distance between the crest of a tsunami wave and the still water level.
The average time interval between tsunami events of a given wave height. It can also be thought of as the inverse of the probability that the wave height will be exceeded in one year.
A geographic location where a hazard curve is created.
A 3D plane that defines a fracture or line of weakness in the Earth's crust. Earthquakes occur by both sides of a fault slipping in opposite directions. Generally speaking, the larger the fault area the larger the earthquake magnitude.
A section of a fault that has the same seismic characteristics. This is made up of one or more subfaults.
A subdivision of a fault used to generate tsunami. Each subfault has a length of 100km and a width of 50km.
A single tsunami source from the precomputed database. This is made up of one or more subfaults located on a single source zone. The PTHA has over 70,000 events.
A detailed tsunami simulation that models a tsunami wave arriving at the coastline and inundating the land.
A project may be a geographical location where a tsunami inundation simulation is undertaken (e.g. Bali).
A single tsunami inundation simulation. This can be matched to a single event.
A geographical location where a time series will be created the represents the wave heights of the tsunami over the time of the simulation.
A polygon that defines the area of the tsunami simulation (formerly called the bounding polygon in ANUGA and area of interest in TsuDAT1.0). This must include at least one hazard point.
An unstructured triangular mesh that represents the simulation area.
A polygon within the simulation area that defines model parameters for the mesh, such as the mesh resolution and mesh friction (see below). This is optional. You can still run a simulation without any internal polygons as the default parameters for the simulation are defined for the simulation polygon.
The maximum area (m2) for a triangle in the mesh (1-1million).
The friction coefficient for the mesh (0.0001 - 1).
A small geographic area within the larger simulation area that is the focus of the simulation. This is usually the community of interest and will be where high resolution data is used and where the mesh resolution will be the finest. This will define the boundary of the output results (rasters) if the user outputs AOI (see Workflow).
A collection of input or output data for the simulation. This may be an elevation raster, internal polygons or an output inundation raster.