SEISTER
SERVICES
Make safe your asset against
external seismic actions
SEISMIC HAZARD ASSESSMENT
-
Development of earthquake catalogues
-
Development of seismic source models
-
Development of ground motion models and adjustments
-
Complex logic trees
-
Site-specific approach to optimize the definition of the design level
-
Optimization of the 3D geometry (subduction/faults)
-
Extensive sensitivity analyses and deaggregation
-
Fractal decomposition of the calculation
-
Non-ergodic models
-
Time-histories development
Our principal staff has managed or conducted a large number of seismic hazard assessment studies in compliance
with various standards and regulations for a variety of project worldwide. Our client-focused approach allows
to optimize the technical solutions for the economic benefit of the project.
PROBABILISTIC FAULT DISPLACEMENT
HAZARD ASSESSMENT (PFDHA)
-
Development of a V&V software to conduct Probabilistic Fault Displacement Hazard (IAEA, safety report n85) where active and capable faults are identified in the near regional scale
-
Accounting for (1) both primary and secondary faulting (2) epistemic and aleatory variability and (3) complex fault geometries
-
Handling complex logic-tree to capture Center Body and Range
-
Investigating the key parameters controlling the hazard variability in terms of annual probability exceedance
_edited.jpg)
ACTIVE FAULT CHARACTERIZATION
Our principal staff is expert in active fault characterization studies to implement PFDHA models, in compliance with various standards and regulations for a variety of geological contexts worldwide.
-
Morphotectonics analysis on high-resolution topography (LiDAR, drone, satellite imagery)
-
Expertise in fieldwork reconnaissance and paleoseismological trenching
-
Processing and interpretation of sub-surface geophysical data (GPR, electric, seismic data)
-
Fault sampling (core drilling, trenching) for multi-approach dating
.jpg)
SITE CHARACTERIZATION
AND SEISMIC MONITORING
-
Design and supervision of site investigation programs
-
Soil response analyses (empirical, numerical)
-
Liquefaction and induced hazard evaluation
-
Seismic microzonation
-
Geophysical investigations for site characterization
-
Assistance for the deployment of seismic monitoring and automatic shutdown systems
TECHNICAL REVIEW AND EXPERTISE
-
Our Principal staff is constantly involved in technical reviews and advisory activity
for critical projects around the globe. -
We provide technical advices, training courses for regulatory bodies and peer reviews
for seismic hazard assessments for existing or new sites in many countries. -
We are actively involved in the nuclear industry working groups of the IAEA and recognized authorities on the assessment of seismic hazard throughout the world.
RESEARCH AND DEVELOPMENT PROGRAMS
-
R&D actions are paramount to produce cutting-edge science results and to provide our clients with the most effective and innovative solutions.
-
Thanks to our background and specific skills we have been involved in several R&D national and international programs related to seismic hazard and risk assessments.
-
We have experience in leading R&D tasks and developing software and methodologies that have been subsequently applied in industry.
Software development:
SHEAR (Seismic Hazard EnhAnced seRvices)
In-house FORTRAN-90 Software to perform state-of-the-art PSHA,
DSHA and PFDHA calculations using complex logic-trees.
-
Complex source zone geometries (volumes, faults, subduction)
-
Calculating activity rates and corresponding uncertainties;
-
Handle zoning or zone-less approaches
-
CAV filtering
-
Source disaggregation and total disaggregation
-
Sensitivity analyses
-
Sanity check : equivalent strain rates associated to the combinations of a-, b- values and Mmax
for comparison to the geodetic strain rates -
Providing various types of results tailored to the requirements of designers
-
Parallel and fractal calculations for computation time efficiency of complex logic trees
