Sudden ground subsidence may seem like an unpredictable event — but in most cases, the ground gives warning signs before it collapses.

The good news? With proper monitoring, it’s possible to act before disaster strikes — especially when using radar technologies such as SAR (Synthetic Aperture Radar).

Keep reading to understand how it works.

Why does the ground sink?

Subsidence happens when the ground loses support and begins to sink. This can occur due to natural causes or human activity. Some of the main triggers include:

• Geological instabilities:
  Regions with fractured rock formations, natural cavities, or poorly compacted soils tend to shift even without external interference.
• Underground excavations:
  Infrastructure works involving tunnels, deep foundations, or subway systems can destabilize the surrounding ground and lead to subsidence.
• Mineral or water extraction:
  Activities such as mining, ore removal, or excessive groundwater extraction alter the balance of the subsoil, increasing the risk of collapse.
• Changes in subsoil conditions:
  Infiltration, erosion, soil compaction, or constant vibrations (common in industrial or urban zones) can all weaken ground stability. 

Where is the risk greatest?

Subsidence impacts vary by industry. Here are the sectors where it can become a critical risk:

• Mining operations:
  Continuous extraction weakens the soil. Without a proper monitoring system, small shifts can go unnoticed until it’s too late.
• Civil construction:
  The foundations of large-scale projects can be affected by even millimetric ground movement, leading to cracks, misalignments, or even full collapse.
• Urban infrastructure and major structures:
  Subways, highways, reservoirs, and dense buildings are highly exposed to soil shifts, which can lead to accidents, operational downtime, and financial loss.

Real case: prevention in Vazante (MG, Brazil)

In 2020, Radaz conducted monthly monitoring of a mining area in Vazante, Minas Gerais. The mission was clear: detect early signs of ground instability — before any damage occurred.

Here’s what was done:

✅ Remote monitoring with radar sensing technology
✅ Tracking of ground behavior
✅ Delivery of precise data, enabling problem-solving before collapse

The result? Operations were adjusted in time, and no structure was compromised.

Prevention is still the smartest move

Monitoring technologies such as Radaz’s SAR radar allow you to anticipate invisible risks and avoid human, structural, and financial losses.

If your operation is located in a high-risk area, start listening to what the ground is saying.

Get in touch and learn how we make sure no warning goes unnoticed.