The KNMI ODC RRSM Web Service provides access to strong motion parameters in JSON format, as well as ShakeMap Input XML files, from the RRSM database of The Netherlands. Results may be filtered by e.g. event ID, time, magnitude or station code. The request type is HTTP-GET.

Note: The inventory data of the accelerometers was fixed on December 2018. On basis of this new inventory, the strong motion values (before and after) and the ShakeMaps (comparison) has been reprocessed in March 2019.

Available URLs

The following URLs are available through this web service:

How it works

The web service description is available directly in WADL (application.wadl) and YAML (application.yaml) formats.

Note: The ODC RRSM Web Service is not stable yet. This is a pre-release version (1.0.0-alpha), the service description might change in future versions.


The units of the strong motion amplitudes are (for both the query parameters and the results):


The information provided by this web service has been automatically processed and it is intended only for research usage. The results are NOT reviewed by a seismologist. The KNMI declines any responsibility from any improper use of the information therein represented.

Although the RRSM stands for a high-quality automatic processing of strong motion parameters, the reliability of this data strongly depends on the magnitude of the earthquake. The bigger the earthquake, the better the reliability of the parameters. In addition, the special nature of the seismicity in Groningen (induced and shallow earthquakes), makes the Nederland RRSM a product still in research and development.

More information

See About the Nederland Rapid Raw Strong Motion (RRSM) portal for more information about the Nederland-RRSM system and the processing of strong motion data for The Netherlands.


The ODC RRSM Web Service has been developed by the Orfeus Data Center (ODC) and customised for the Nederland-RRSM by the KNMI.