Information on the supply of data can be found on the page data supply
Seismic and other geophysical studies
TNO houses the national geophysical database – mainly seismic data – acquired under the Mining Act. Seismic lines or surveys can be downloaded through the interactive map or the data center free of charge. In case seismic data cannot be downloaded or found on NLOG a data request can be initiated through the NLOG-Service desk. If the requested data is found and delivered a fee will be charged for any work done by the Service desk. Fees are listed in ‘Fees TNO Seismic Data Requests'
The map showing digital 2D lines displays only those lines where quality control (QC) has been performed. More datasets are, however, available and currently undergoing QC. It is useful, therefore, to specify the area you are trying to find 2D data for, so that TNO can check whether relevant digital data are available for that area. Data without QC can usually be supplied within two weeks.
Multi-client seismic surveys (spec surveys)
In early 2016, the Ministry of Economic Affairs decided, ahead of an amendment to the Mining Decree, to extend the confidentiality period for multi-client seismic surveys from five to ten years. The expiry dates of confidentiality periods for all multi-client seismic surveys available from TNO have now, therefore, been set at ten years after completion of data acquisition.
Since the Mining Act was changed in 2014, pre-stack data must also be released to the government. This means that any 2D or 3D pre-stack data can also be requested via NLOG. Pre-stack data are available for various 2D lines. These pre-stack datasets are not yet visible on our maps. TNO welcomes enquiries about the availability of pre-stack data for areas or lines you are interested in. If these are not available from us, they may be requested from the data owner. However, very early data may no longer be retrievable.
You can request 3D pre-stack data you are interested in. TNO will then request them from the data owner, check they are complete and supply them to you. For these activities TNO asks a fee: Fees TNO Seismic Data Requests.
Regulations on seismic surveys
The Dutch State Supervision of Mines (Staatstoezicht op de Mijnen) must be notified of how a reconnaissance survey is to be carried out. This applies to all types of geophysical surveys. More information.