Seismotectonic & Neo-tectonic Studies
Regional seismotectonic assessment, neo-tectonic and active-fault analysis, interpretation of seismic hazard data for dam and hydropower structures, and seismic microzonation inputs.
Nepal sits on an active collision boundary, and every dam, powerhouse and long-span bridge in the country is a bet about ground motion. The 2015 sequence made that abstract argument concrete for a generation of asset owners, and seismic assessment has moved from a specialist afterthought to a financing requirement.
e2services provides regional seismotectonic assessment and neo-tectonic and active-fault analysis for infrastructure siting and design. The work establishes the tectonic setting, identifies and characterises the faults that matter for a given site, and reviews and interprets the seismic hazard data that dam and hydropower structures are designed against.
The practical output is usually a design parameter and the reasoning behind it. A number handed over without its derivation is not usable by a reviewer, a lender or a regulator — so the assessment sets out the source model, the attenuation reasoning and the uncertainty, and says plainly which parts are constrained by evidence and which are judgement.
Seismic microzonation inputs extend the same work to urban and critical-facility siting, where site response varies sharply across short distances and a single regional value hides more than it reveals.
What we deliver
- Regional seismotectonic assessment
- Neo-tectonic and active-fault analysis
- Review and interpretation of seismic hazard data relevant to dam and hydropower structures
- Seismic microzonation inputs for critical infrastructure siting
- Design earthquake parameter derivation
How the work runs
- 01
Tectonic setting review
Regional tectonic framework and historical seismicity compiled for the area influencing the site.
- 02
Fault identification and characterisation
Active and neo-tectonic structures identified from imagery, terrain models and field evidence, and characterised where the record allows.
- 03
Seismic hazard data interpretation
Available hazard studies and datasets reviewed and interpreted for relevance to the specific structure, rather than adopted wholesale.
- 04
Design parameter derivation
Design ground motion parameters derived with the source model, reasoning and uncertainty documented for reviewer scrutiny.
- 05
Microzonation input
Site response considerations provided where local variation is material to siting or design.
What you receive
- Regional seismotectonic assessment report
- Active and neo-tectonic fault mapping
- Historical seismicity compilation
- Seismic hazard data review and interpretation
- Design earthquake parameters with derivation and uncertainty
- Seismic microzonation inputs for siting
- GIS layers for tectonic and hazard features
Common questions
Is this work relevant if our project is not a dam?
Seismic microzonation inputs for critical infrastructure siting apply well beyond dams — hospitals, bridges, substations and any facility whose failure has consequences past its own footprint. Dams are simply where the requirement is most often mandatory.
Who carries out this work?
Alongside our regular staff, e2services mobilises a wider pool of specialist resource consultants including PhD-level specialists in geology, hydrology and related disciplines, which is how we form multi-disciplinary study teams for assignments of this kind.
Need a survey, a design package, or a multi-disciplinary study team?
Tell us about the corridor, basin, or facility. We will respond with the right mix of engineering and field capability.