Improve your earthquake resilience

It will happen again. New Zealand’s history is one of consistent earthquakes, affecting people, property and infrastructure.

Sentinel protects your organisation and its people with a detailed picture of building-by-building shaking, improving post-quake decisions.

Unique services

Using a cloud-based subscription model, combined with our super-dense sensor network EQRNet, we deliver a unique, proprietary batch of services.


Earthquake response, effects and management, not science. Specifically designed to improve city-wide future response and resilience.

Services & Solutions

Sentinel is a subscription service model based on years' of hard-won experience, and what delivers maximum benefits.

Your building Sentinel

How does Sentinel work?

Sentinel directly compares ground shaking against the NZ Building Code design demand of any individual structure – big or small, new or old, on any ground condition and of any importance level. We do this by generating, in real time, a ground response spectrum for every individual building covered by our service. 

Unlike the currently available measures such as Mercalli Scale, or peak ground acceleration, our new approach relates the shaking acceleration (its intensity) and its frequency (how rapid the shaking is), to how the structure behaves. Sentinel’s Ground Response Spectrum is easily related to building design strength in ways other measurements cannot.

Based on the expected size of large earthquakes, the NZ Building Code defines limit state curves of shaking intensity vs. frequency. The curves are scaled based on soil type, building importance level and percentage of code.

Shaking beyond the Ultimate Limit State (ULS) means the building has exceeded its design, with possible structural damage. Shaking below the Serviceability Limit State (SLS) means the building should remain fully serviceable.

For more information on how Sentinel works, click here.

What do I get with Sentinel?

We’ve made Sentinel accessible to the public for free on our Public page. This page shows descriptive intensity and provides an area map for context to ensure that the information is easy to understand for everyone.

Users of Sentinel gain access to additional pages with relevant and more detailed information through our login portal.

For building occupiers and wardens, we provide the Building Occupier page which provides non-technical “traffic light” status of your specific building.

For building owners and structural engineers, we provide the Building Owner page. This page provides detailed shaking information, relative to each buildings design parameters.

We also provide an Area Heatmap page specifically for emergency response managers and coordinators. This page provides detailed area-wide shaking information for resource prioritisation.

Sentinel Condition

Shaking below SLS.
Business as Usual

Sentinel Condition

Shaking above SLS.
Expected onset of moderate non-structural damage.

Sentinel Condition

Shaking above ULS.
Expected moderate to major non-structural damage, possible structural damage.

Real-time decision information

Wardens and Facility Managers

Instant easily understood information to the decision-maker in your business. 

Ground shaking instantly compared to each building’s design limit state.

Supports immediate, building specific actions and decisions

Sentinel Condition WHITE, AMBER or RED

Sentinel instant messages via SMS, email and App.

Sentinel building status dashboard, single building or portfolio

Owners and Structural Engineers

Detailed event information for every building, sent directly to the building owner and structural engineer.

Instant complete ground response spectra, relative to building Serviceability Limit State and Ultimate Limit State. Horizontal spectra aligned to building transverse and longitudinal axes. Vertical response spectrum available.

MMI, PGA, PGV, PGD, duration and other damage indicators

Supports post-quake damage assessment, repair and re-occupancy decisions.

Sentinel instant detailed messages via SMS, email and App.

Sentinel building status dashboard, single building or portfolio

Inspectors and Civil Defence

Area wide summary information for the emergency management professional.

Choice of damage indicators, including ground shaking relative to NZ Building code, MMI, PGA, PGV, PGD and duration.

Ultra-dense spatial resolution – true measured variability across 200 m or less.

Supports triage of area zones and/or buildings, and prioritisation of initial response.

Suitable for campus, city or regional response; reduced red-zoning, better business continuity and improved economic resilience.

Sentinel regional status dashboard.  Available as map view, or as data layer to transfer to external systems via secure API.


Simplified, descriptive ground shaking information across the city.

Ground shaking heatmap in descriptive Mercalli scale.

At a glance, everyone can see which areas are most affected.

Instantly relates measured shaking to a description of how people perceive it.