Eurocode 8 Ground Type Lookup
EN 1998-1 Table 3.1 ground type from VS30: >800 m/s A, 360–800 B, 180–360 C, and <180 D. Type E is not inferred because its definition requires stratigraphic information beyond VS30.
Description
EN 1998-1 Table 3.1 ground type from VS30: >800 m/s A, 360–800 B, 180–360 C, and <180 D. Type E is not inferred because its definition requires stratigraphic information beyond VS30.
Eurocode 8 Ground Type Lookup is a focused tool for the following task. EN 1998-1 Table 3.1 ground type from VS30: >800 m/s A, 360–800 B, 180–360 C, and <180 D. Type E is not inferred because its definition requires stratigraphic information beyond VS30. It reports Type, Description from the values you provide rather than inventing measurements, coefficients, or professional judgment that are not part of the input.
When to use Eurocode 8 Ground Type Lookup
Use this seismology calculation to reproduce a stated convention, screen observations, or compare scenarios whose units, coordinate conventions, catalog selection, and model assumptions are known.
- VS30 (m/s)
- Required number in m/s. Average shear velocity, top 30 m.
The cited overview of Seismic site effects supplies background for the terminology and domain context used by this tool.1
How Eurocode 8 Ground Type Lookup works
EN 1998-1 Table 3.1 ground type from VS30: >800 m/s A, 360–800 B, 180–360 C, and <180 D. Type E is not inferred because its definition requires stratigraphic information beyond VS30. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.
- Type
- Returned string. Eurocode 8 ground type inferred from VS30 (A–D).
- Description
- Returned string. Ground description.
Limitations and assumptions
- Earth structure, source geometry, path effects, site response, instrument response, catalog completeness, uncertainty, and the fitted range can dominate the accuracy of simplified seismic calculations.
- VS30 must be at least 0.
- Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.
Alternative or Complementary approaches
For analysis or hazard decisions, retain uncertainty and provenance and compare the result with waveform processing, calibrated regional models, and guidance from qualified seismologists or the responsible agency.
References
-
Seismic site effects — Wikipedia contributors
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