Thread: Site Characterisation Research Opportunity at Royal Observatory of Belgium

Started: 2019-05-15 12:51:12
Last activity: 2019-05-15 12:51:12
Institution: Royal Observatory of Belgium
Open Until: 2019-05-31

Dear colleagues,

In the framework of EPOS, we are looking for an early career and dynamic collaborator at the Royal Observatory of Belgium in Brussels for performing array techniques with available equipment to characterise the sites hosting the Belgian Broadband and Accelerometric stations. This 2yr position is opened at the postdoctoral level but candidates who are experienced in site characterisation are still eligible as well.

The ROB’s existing seismic and accelerometric observation infrastructure must be included in EPOS to provide open access seismic waveform data from the BE network. This BELSPO EPOS-BE project targets to perform a full site characterisation of selected seismic stations of the Belgian seismic network, with a priority on the broadband and accelerometric stations.

The candidate will be responsible for the site characterisation of network stations, hereby helped by the permanent researchers and technicians of the section. Specific tasks are summarised as (see also link to pdf in below):
 Compiling all available data (geology, geomorphology, topography, geotechnical information, soil classes, etc.)
 Conducting field surveys to measure H/V spectral ratios (HVSR), recording surface waves using passive seismic array techniques. If needed, complemented with active seismic profiling, electrical resistivity tomography or other non-invasive geophysical methods;
 Computing key parameters including Wavefield polarization, Resonance frequency, Rayleigh ellipticity, A site’s Love and Rayleigh dispersion curve, Shear-wave velocity (VS) profiles;
 Producing information sheets on network stations including 1D velocity models obtained through dispersion curve inversion, Vs30 and bedrock Vs, Frequency dependent polarizations, evaluating the influence of topographical or local geological effects.

As final product, an evaluation of site conditions using earthquake data needs to be performed which are needed to better correct instrumental records and to select appropriate GMPEs. This task will be performed in collaboration with the scientific staff of the section.

Competence Profile:
To meet the EPOS-BE site characterisation goals, the candidate must:
 Be independent, motivated, and capable to lead field surveys with colleagues and technicians
 Have strong field experience in seismic array techniques
 Have an extensive knowledge of the processing, inversion and interpretation of HVSR and seismic array data, using the Geopsy software or equivalent
 Demonstrate proficiency in producing scientific reports and respecting deadlines
 Hold a driving license (B)
 Show knowledge of or be ready to learn basic French and/or Dutch

Additional competences:
 Proficiency in Python and Obspy.

Apply by sending your CV and motivation letter to the head of the Seismology-Gravimetry section: Michel Van Camp (mvc<at> Applications are welcome until May 31 2019 included.

 The Belgian Seismic Network:
 The Royal Observatory of Belgium:
 Living in Belgium:


Kind regards
Koen Van Noten, PhD
Royal Observatory of Belgium
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