RD (x, y) [m] -
GPS (lat, lng) [°] -
Cluster (aan maaiveld) -
Cluster (op diepte) -

User instructions: Click a location or use the input field to search for an address. Choose the appropriate return period. Copy the data by selecting it and pasting it into e.g. Excel.

No information is available for this location.

NPR 9998:2020 - 3.2.1 Base ground acceleration
If the peak ground acceleration agS at surface level, determined according to the NPR 9998-webtool for a return period of 475 years is less than 0.05g or in case the webtool doesn’t produce any values, an assessment for seismic actions is not required (‘very low seismicity’).

Parameters at surface

The Uniform Hazard Spectrum (UHS) may be displayed as an elastic response spectrum according NPR 9998. The required parameters are given in the table on the left.

Parameters at depth

agRef is the value of the peak ground acceleration at a reference depth of 30m below the surface or on an equivalent depth where the soil has a shear-wave velocity of 300 m/s or more (section

If it is possible to use the UHS data directly in the chosen analysis method and/or software, the values given in the table above can be used.

Data selected point
Name -
LPI-ish -
Total depth CPT -
RD (x, y) [m] -
GPS (lat, lng) [°] -
 /  LPI-ish value less than 5
 /  LPI-ish value equal to or greater than 5

The map only shows available LPI-ish data for a return period of 2475 years.

RD (x, y) [m] -
GPS (lat, lng) [°] -
Mean value -
Standard deviation -

The Vs12 and Vs30 values are given for GMM V6 and is equal to the Vs30 value for the GMM zone of the selected coordinate, following Kruiver et al. 2017 and GMM V6 (Bommer et al. 2019).

Kruiver et al 2017
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