Groundwatch PH

Magnetic Surveys

Magnetic Survey Methods

Groundwatch applies magnetic surveys for target reconnaissance, structural mapping, and integration with other geophysical datasets.

Definition

What this method is

Magnetic surveys measure local variations in Earth magnetic response caused by susceptibility contrasts in subsurface materials.

Groundwatch applies magnetic surveys for target reconnaissance, structural mapping, and integration with other geophysical datasets.

How It Works

From field measurement to interpreted model

  1. 1Magnetometers record total magnetic intensity along planned traverses or grids.
  2. 2Data is corrected for drift, diurnal change, and cultural noise where possible.
  3. 3Anomaly mapping supports interpretation of structures, ferrous objects, and target zones.

When to Use

Best-fit conditions for this method

  • Mineral and structural reconnaissance where magnetic contrast is expected
  • Ferrous target detection and buried-object screening
  • Integrated geophysical programs that need magnetic context

What It Can Help Identify

Subsurface features and signals

  • Magnetic susceptibility contrasts
  • Lineaments, faults, and structural trends
  • Potential target zones for follow-up checks

Deliverables

What you receive

  • Magnetic anomaly maps
  • Processed derivative grids
  • Interpretation summary and target ranking

Typical Outputs

What the data looks like

  • Total field maps
  • Anomaly targets
  • Integration-ready datasets

Applications

Common applications in the Philippines

Exploration baseline studies

Infrastructure and corridor screening

Integrated geohazard and target reconnaissance

Method Limitations

What this method cannot do alone

  • Urban or cultural metallic noise can affect interpretation confidence.
  • Magnetic anomalies are indirect indicators and need contextual validation.

Geophysical results are interpreted models based on measured physical property contrasts. Results should be correlated with boreholes, test pits, drilling, geological mapping, laboratory data, or other direct investigation methods where required.

Related Services

Methods and applications that work together

FAQs

Frequently Asked Questions

Do magnetic surveys work in urban areas?

They can, but dense metallic infrastructure may reduce interpretability, so survey planning is adjusted to the site conditions.

Can magnetic data stand alone for target confirmation?

Magnetic data is strongest when integrated with geology, other geophysical data, and direct investigation.

What does a magnetic survey help identify on development sites?

It can help identify ferrous clutter, structural trends, and anomalous zones that may require follow-up investigation before design or excavation.

Get in touch

Discuss magnetic survey scope

Send your target objective, map references, and site constraints so we can recommend line spacing and interpretation workflow.

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