Large-Scale Autonomous Gas Monitoring for Volcanic Environments: A Legged Robot on Mount Etna

Why It Matters

By removing humans from dangerous volcanic zones, the technology provides continuous, reliable gas measurements that improve eruption prediction and protect personnel.

Key Takeaways

• Legged robot navigates steep, loose volcanic terrain autonomously
• Integrated quadruped carries commercial quadrupole mass spectrometer for gas analysis
• Autonomy rates exceeded 90% across three distinct crater missions
• Detected sulfur dioxide and carbon dioxide matching handheld reference data
• System enables safe monitoring of hazardous volcanoes without human exposure

Summary

The video introduces a quadruped robot designed to autonomously monitor volcanic gases on Italy’s Mount Etna, addressing the long‑standing challenge of sampling in unstable, toxic terrain.

Equipped with a commercial quadrupole mass spectrometer, the robot combines global localization and terrain‑aware navigation, allowing it to traverse loose soil, steep slopes and lava fields. In four field missions—three fully autonomous at the Sylvestri crater rim, a crater descent, and a volcanic desert at Legetto—the system achieved autonomy rates above 90% and identified multiple artificial gas releases.

During a tele‑operated run inside Legetto crater, the spectrometer recorded clear sulfur‑dioxide and carbon‑dioxide signatures that matched handheld reference measurements, confirming analytical accuracy even on unstable ground.

These results demonstrate that legged platforms can safely collect high‑resolution gas data from hazardous volcanoes, opening the door to continuous, human‑free monitoring and more timely eruption forecasts.

Original Description

Volcanic gas measurements are critical for understanding eruptive activity. However, harsh terrain, hazardous conditions, and logistical constraints make near-surface data collection extremely challenging.

In this work, we present an autonomous legged robotic system for volcanic gas monitoring, validated through real-world deployments on Mount Etna. The system combines a quadruped robot equipped with a quadrupole mass spectrometer and a modular autonomy stack, enabling long-distance missions in rough volcanic terrain.

Key highlights:

✅ Three autonomous gas-monitoring missions across diverse volcanic terrains

✅ Successful mapping of SO₂ and CO₂ at natural fumaroles

✅ Lessons learned for gas analysis and long-range autonomy in the field

💻 Project page: https://leggedrobotics.github.io/etna-expedition/

📄 Paper (arXiv): https://arxiv.org/abs/2601.07362

👥 Team: Julia Richter, Turcan Tuna, Manthan Patel, Takahiro Miki, Devon Higgins, James Fox, Cesar Cadena, Andres Diaz, Marco Hutter