Subsurface Intelligence
Stop thembefore they surface.
TunnelHunter transforms underground vibration, seismic activity and subsurface radar into real-time intelligence — detecting tunnelling operations before protected facilities, borders or critical infrastructure are breached. Powered by AIREZ Sense™, Edge AI and the AIREZ GSOC.
- Fiber
- Geophones
- Ground radar
- Detected before breakthrough
Section 01
The threat beneath the surface.
Traditional perimeter security protects the surface. TunnelHunter protects what lies below — extending the AIREZ Physical Intelligence Layer into the subsurface domain.
Cameras
Complete coverage of everything above ground, and nothing below it.
Fences
A barrier that ends precisely where the excavation begins.
Patrols
Rarely encounter digging until spoil, subsidence or breakthrough reveals it.
Buried Fiber
AIREZ Sense hears micro-vibration through soil, continuously, along every metre.
Geophone Array
Low-frequency ground movement confirms and locates the excavation.
Ground Radar
Voids and soil-density anomalies imaged beneath the protected line.
Subsurface Awareness
An active tunnel understood, tracked and intercepted before breakthrough.
Section 02
Multi-layer subsurface detection.
Five stacked layers, each answering a question the layer above cannot.
0–3 m · continuous
Fiber Layer
AIREZ Sense (FoRi) resolves micro-vibration and tunnel-wall disturbance along the entire buried run, with no powered device in the ground.
Section 03
From soil movement to operational intelligence.
TunnelHunter identifies excavation activity while it is happening — long before a completed tunnel exists.
- 01
Fiber Vibration detects first
A disturbance in the soil column resolved to a position along the buried run.
- 02
Geophone Confirmation corroborates
Independent low-frequency confirmation removes surface and machinery false positives.
- 03
Ground Radar Imaging renders it
Void and density imaging turns the signature into observed subsurface structure.
- 04
AI Pattern Recognition classifies
Hand digging, mechanical drilling, shoring or blasting, distinguished by signature.
- 05
Trajectory Prediction projects
Heading and progression modelled from accumulated detections along the corridor.
- 06
Depth Estimation measures
Excavation depth resolved against the local geological profile.
- 07
Time-to-Breach Forecast times it
Progress rate converted into an operational window for response.
- 08
Operator Notification escalates
Risk-scored alert with map, depth, heading and supporting evidence attached.
- 09
Coordinated Response closes it
Intercept drill points, dispatch and evidence capture coordinated from the GSOC.
Section 04
Key capabilities.
Four capability groups spanning detection, subsurface reasoning, coordination and hardened deployment.
Digging Detection
- Hand excavation.
- Mechanical drilling.
- Pickaxe activity.
- Explosive signatures.
- Shoring installation.
Subsurface Intelligence
- Tunnel trajectory modeling.
- Depth estimation.
- Geological normalization.
- Excavation progress tracking.
- Time-to-breach prediction.
GSOC Coordination
- Tunnel risk maps.
- Intercept drill-point recommendations.
- Dispatch coordination.
- Evidence collection.
- Incident history.
Hardened Deployments
- Underground fiber.
- Passive sensing.
- EMF immunity.
- Tamper alerts.
- Redundant communications.
Section 05
Deployment environments.
Select an environment to see the operational scenario TunnelHunter is configured against.
Deployment scenario
Border Corridors
Cross-border excavation detected mid-dig along linear corridors, with heading and depth reported before breakthrough.
Section 06
One sensing layer inside a larger intelligence.
TunnelHunter is a specialized subsurface layer within the Physical Intelligence ecosystem. Underground detections become part of the broader operational picture rather than a separate console.
AIREZ Sense (FoRi)
Geophones
Ground Radar
ShadowGrid
SilentApproach
GhostTrack
MissionGraph
Sky Watch
GSOC
AI Models
Section 07
Commercial deployment.
Delivered as a corridor programme, scoped to terrain, geology and protected asset.
Linear Detection Corridors
Continuous subsurface coverage engineered along the protected line.
Fiber & Geophone Arrays
Buried AIREZ Sense runs paired with geophone confirmation nodes.
Ground Radar Systems
Void and density imaging where confirmation and depth resolution are required.
Edge AI Appliances
Hardened on-site compute running classification and scoring locally.
AIREZ Analytics
Trajectory, progression and geological models that improve across deployments.
GSOC Monitoring
24/7 operational surface, escalation and dispatch coordination.
Federal Counter-Tunnel Programs
Multi-site programmes with sustainment, training and evidentiary standards.
Section 08
Future roadmap.
Subsurface understanding compounds with every corridor deployed.
Today's TunnelHunter
Fiber, geophone and radar fusion with trajectory, depth and time-to-breach reasoning.
AI Soil Classification
Signatures normalized automatically against local soil composition.
Advanced Geological Modeling
Full subsurface models used to predict feasible excavation routes.
Autonomous Inspection Robots
Ground platforms verifying and imaging suspected voids.
Satellite Terrain Correlation
Surface displacement and spoil signatures correlated from orbit.
Predictive Tunnel Risk Mapping
Corridors ranked by likelihood before any digging begins.
National Counter-Tunnel Networks
Federated subsurface awareness shared across agencies and borders.
Section 09
Why TunnelHunter.
Perimeter security ends at the surface. TunnelHunter adds the third dimension.
Traditional Perimeter Security
AIREZ TunnelHunter
Surface only
Surface + subsurface
Reactive discovery
Predictive detection
Visual monitoring
Multi-sensor intelligence
Manual inspection
Continuous monitoring
Unknown underground activity
AI subsurface awareness
Related resources
Take the detail with you.
Briefs, guides and analyses covering this solution and the environments it operates in.
- Why AIREZ Stands Out Through Contextual AnalysisHow contextual analysis turns raw detections into decisions operators can act on, and why it eliminates notification blindness.Technology Brief · v1.0 · PDF
- Assessment of Fiber-Optic Technology for Security & Countering Extremist ThreatsAn independent technical assessment by Ted Reynolds, PhD, of the Fiber Optic Ring Interferometer (FoRI) as an intrusion detection and perimeter monitoring system. Covers cost/performance versus military-grade DAS, immunity to electromagnetic interference and lightning, intrinsic safety in hazardous environments, subterranean and in-structure deployment, threat localisation and movement tracking, and discrimination between foot, bike and vehicle traffic for VBIED and vehicle-as-weapon scenarios.White Paper · v1.0 · PDF
Own the domain below the surface.
TunnelHunter extends the AIREZ Physical Intelligence Layer into the underground environment, combining fiber-optic sensing, geophones, radar and AI reasoning to detect excavation, tunnelling and subterranean threats before protected assets are compromised. It transforms hidden underground activity into actionable operational intelligence.
- Border Security
- Correctional Facilities
- Military Installations
- Federal Agencies
- Critical Infrastructure
- High-Security Compounds