# Ground-penetrating radar · Concept

> Mapping what lies under the ground by bouncing radio pulses off buried surfaces.

Source: https://mysteriesdept.com/concepts/CPT0DECW04JAPJM/ground-penetrating-radar  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Concepts](https://mysteriesdept.com/concepts)Ground-penetrating radar

Concept · geophysics · in 1 mystery

# Ground-penetrating radar

Mapping what lies under the ground by bouncing radio pulses off buried surfaces.

[1908 Tunguska event](https://mysteriesdept.com/mysteries/tunguska-event)

A radar antenna dragged across the ground sends pulses down and records the echoes from boundaries between materials: a wall, a pit, a change of soil. It finds structure without digging and is used on this site at Stonehenge, Gunung Padang and the Oak Island money pit. It shows that something is there, not what it is; only excavation does that.

## Where it comes up

**[1908 Tunguska event](https://mysteriesdept.com/mysteries/tunguska-event)**

The 2023 strewn-field calculation gives a defined search area of about 140 km² north-west of the epicentre, where a magnetometer and ground-penetrating radar survey of the permafrost could look for buried stony or iron…

## Cite it

```
Mysteries Department. (2026). Ground-penetrating radar [Concept CPT0DECW04JAPJM]. https://mysteriesdept.com/r/CPT0DECW04JAPJM
```

Key

**CPT** 0DECW04JAPJM

Record

Concept

Field

Geophysics

Related

[Stratigraphy](https://mysteriesdept.com/concepts/CPT0DECW01M0SC0/stratigraphy) · [Electrical resistivity tomography](https://mysteriesdept.com/concepts/CPT0DECW04R3MN9/electrical-resistivity-tomography)

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Related concepts

[Stratigraphy](https://mysteriesdept.com/concepts/CPT0DECW01M0SC0/stratigraphy)[Electrical resistivity tomography](https://mysteriesdept.com/concepts/CPT0DECW04R3MN9/electrical-resistivity-tomography)

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