Geophysical Surveying

What is Geophysical Surveying?

Geophysical surveying is a non-invasive method used to study subsurface conditions by measuring physical properties of the ground, such as electrical resistivity, seismic waves, and magnetic fields. It helps reveal what lies beneath without the need for excavation or drilling.

In Malaysia, geophysical surveys are widely used for construction planning, groundwater detection, mineral exploration, slope hazard studies, and environmental assessments. These techniques are fast, cost-effective, and ideal for covering large areas with minimal disruption.

At Geotechnica, we offer a range of geophysical surveying services including electrical resistivity imaging (ERT), seismic refraction, MASW, and ground-penetrating radar (GPR)—delivering accurate subsurface data to support smart, safe, and sustainable engineering decisions.

Our Services

Geophysical Surveying

Seismic Methods

Seismic surveys use vibrations or waves to map subsurface layers by analyzing how they travel through different materials.

Wave Velocity Profiling
Slope Stability & Foundation
Seismic Refraction & MASW
Subsurface Stiffness & Depth Analysis

Gravity Surveys

Gravity surveys measure variations in Earth’s gravity to detect changes in subsurface density, useful for mapping large-scale structures.

Density Contrast Interpretation
Mineral & Oil Exploration
Gravity Data Collection
Mapping Bedrock & Deep Geological Features

Electromagnetic

EM surveys detect conductivity and magnetic changes in the ground to locate water, minerals, or buried objects.

Utility Detection
Conductivity Profiling
Shallow Subsurface Mapping
Groundwater & Contamination

Electrical Resistivity

Electrical resistivity surveys inject current into the ground and measure resistance to map soil layers, water zones or voids.

Borehole Correlation
Groundwater Detection
Foundation & Slope Investigations
Electrical Resistivity Tomography (ERT)

Magnetic Surveys

Magnetic surveys measure variations in Earth’s magnetic field to locate buried ferrous materials or geological features.

Mapping Archaeological / UXO Targets
Ground Magnetometer
Supporting Geotechnical Risk Assessments
Identifying Faults, Dykes & Mineral Zones

Ground Penetrating Radar

GPR sends radar waves into the ground to detect shallow features like pipes, voids, and pavement thickness.

Locating Utilities & Voids
Road & Bridge Deck Assessment
Archaeological & Structural Forensics
High-Resolution Subsurface Scanning

Case Studies

Geophysical Surveying Case Studies

Hazard and Risk Slope Assessment (Penilaian Bahaya dan Risiko Cerun)

What is RQD in Soil Investigation (Ultimate Guide)

Soil Environmental Sustainability by Geotechnica

Tools & Software

Geophysical Surveying Tech & Tools

Industries

Industries We Work

Oil & Gas

Maps pipeline corridors and monitors terrain for safe infrastructure planning.

Mine & Quarry

Generates 3D terrain models for volume calculations, pit monitoring, and site planning.

Civil Infrastructure

Supports road, rail, and bridge design with precise elevation and surface data.

Utilities Powerlines

Inspects powerline corridors & detects vegetation encroachment for safety.

Forest & Plantation

Measures canopy height, tree density, and biomass for resource management.

Environmental & Coastal

Monitors coastal erosion, flood zones, and conducts environmental impact studies.

Why Us

Why Choose Geotechnica

High End Equipment

We are euipped with latest and high-end LiDAR equipment and software to get 100% accuracy of data & statistics

National Level Project

Since 2020, we had handled 20+ state and national-level projects through LiDAR in geotechnical and geo engineering

Certified Engineers & Surveyors

Our engineers & surveyors are international and local graduate with numbers of experience in geo engineering

Custom Report & GIS Integration

You will received 100% accurate reporting documents and able to get GIS integration needed from our team

FAQ

Geophysical Surveying FAQ

What is geophysical surveying?

It’s a non-invasive way to study what’s underground using physical signals like waves, currents, or magnetism.

Why is geophysical surveying important?

It helps detect soil layers, rocks, voids, or water—without digging or drilling.

What types of geophysical methods are used in Malaysia?

Common methods include seismic refraction, electrical resistivity, GPR, electromagnetic (EM), and magnetic surveys.

When is geophysical surveying needed?

Before construction, during slope assessments, for groundwater mapping, or mineral exploration.

How deep can geophysical surveys detect?

Depending on the method, it can detect from a few meters up to hundreds of meters deep.

Is geophysical surveying safe for buildings and roads?

Yes. It’s non-destructive and ideal for developed or sensitive sites.

What is the difference between GPR and resistivity?

GPR uses radar waves for shallow features, while resistivity uses electric current for deeper soil profiling.

Can geophysical surveys find groundwater?

Yes. Methods like electrical resistivity and EM surveys are effective for locating aquifers and water tables.

How long does a geophysical survey take?

Small sites may take a few hours; larger or deeper studies may take 1–3 days.

Why choose Geotechnica for geophysical surveys in Malaysia?

We combine advanced tools with expert interpretation to deliver fast, reliable subsurface data tailored to your project.

Gallery

Geophysical Surveying Gallery

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GEOTECHNICA SDN BHD
48-1, Jalan Aman Sinaria 4,
Bandar Tropicana Aman,
42500 Rimbayu, Selangor

Tel: 03-8683 6682
Email: admin@geotechnica.com.my