Unlocking Earth’s Secrets: New Science Aims to Improve Earthquake Forecasting

Earthquakes are one of nature’s most unpredictable and destructive forces, capable of reshaping landscapes and devastating communities in seconds. While predicting the exact moment an earthquake will strike remains impossible, pioneering research at Utrecht University is bringing us closer to forecasting where and how they might happen, and potentially when probabilistically. Led by Associate Professor Dr. Ylona van Dinther, this work focuses on developing advanced physics-based models and integrating diverse data sources to build a clearer picture of Earth’s hidden fault lines. The key takeaways are the integration of vast timescales, borrowing techniques from weather forecasting, and using advanced computing to analyze subtle ground movements.

The Challenge: Why Earthquakes Are So Hard to Forecast

Earthquakes occur deep within our planet when immense pressure builds up along faults – giant cracks in the Earth’s crust – until the rocks finally slip. This process is incredibly complex, involving forces that act over millions of years culminating in events that last mere seconds or minutes. Traditionally, forecasting felt like an insurmountable challenge due to the scale and lack of detailed information about what’s happening miles beneath our feet. Scientists have long needed a way to bridge the gap between the slow, continuous movement of tectonic plates and the sudden, explosive rupture of an earthquake.

A Pioneering Approach: Bridging Time Scales and Borrowing from Weather

Dr. van Dinther’s research journey began by tackling this fundamental challenge: bridging the vast difference between geological time (millions of years) and earthquake time (milliseconds) within computer models. Imagine trying to simulate a mountain range forming over ages and a single lightning strike within that landscape using the same tool – that’s the kind of jump this represented. This groundbreaking work, initially thought by many to be impossible, opened new avenues for understanding the entire ‘earthquake system.’

Building on this, she then looked outside traditional earth science, drawing inspiration from a field that excels at predicting complex systems: weather forecasting. Using techniques called “ensemble-based data assimilation,” similar to how meteorologists combine models and real-time observations to forecast storms, her team explored if these methods could work for earthquakes. Although the Earth’s interior is far less observed than the atmosphere, initial results showed promising potential, demonstrating that powerful forecasting techniques could potentially be adapted for the solid Earth.

Unlocking New Secrets with RESET

Her latest project, RESET (mega-thRust Earthquake SystEm Theory), funded by the European Research Council (ERC), is designed to significantly advance these efforts.

What is RESET?

RESET aims to refine our understanding of large earthquakes, particularly those in subduction zones where one tectonic plate slides beneath another. These are responsible for the planet’s biggest quakes and tsunamis. The project integrates Dr. van Dinther’s previous work on bridging time scales and data assimilation into a new framework focused on getting a more complete picture of how faults behave.

Finding Hidden Faults: The Power of Vertical Motion

For decades, scientists have used satellite and GPS data to measure the horizontal movement of the Earth’s surface, which helps map where faults are locked or slipping. However, RESET is capitalizing on recent advancements in measuring vertical ground motion – the subtle up-and-down shifts of the land.

Majestic mountains rise above clouds, illustrating the powerful geological forces of plate tectonics studied for earthquake forecasting research.

Think of it like mapping a landscape. Horizontal measurements show you distance across the map. Vertical measurements add the crucial elevation data, showing the hills and valleys. For earthquake faults, vertical motion provides unique clues about how deep a fault is stuck and how much strain is building up below the surface. By incorporating these vertical movements into their models, the RESET team aims to create much more accurate ‘images’ of fault behavior, revealing hidden stress points where future large earthquakes are more likely to originate.

Supercharging the Science: The Role of Computers

Analyzing these vast datasets and running complex simulations requires immense computing power. RESET will leverage high-performance computing techniques, utilizing GPUs (Graphical Processing Units) – similar to the processors that power video game graphics but on an industrial scale – to speed up calculations. This will allow the team to quickly process data and simulate fault behavior over long periods, running the models forward to see potential future scenarios and backward to understand past events.

Why It Matters: From Megathrusts to Human Activity

This research has profound implications for both understanding natural disasters and ensuring the safety of human activities.

Forecasting the Biggest Shakes (Megathrust Earthquakes)

By focusing on subduction zones, RESET directly addresses the risk posed by the most powerful earthquakes on Earth. Events like the 2011 Tohoku earthquake off the coast of Japan, which triggered a devastating tsunami and nuclear disaster, occur in these zones. These megathrust quakes are rare but impact millions globally. Better forecasting of where these faults are most stressed could allow communities to be better prepared.

Powerful ocean waves from a tsunami surge towards a coastline after a large earthquake, highlighting the devastating impact of seismic events and the need for improved forecasting.

Understanding Earthquakes from Human Activity

Dr. van Dinther’s work also extends to induced seismicity – smaller earthquakes caused by human activities, such as extracting resources or storing waste underground. Her research in the Groningen gas field in the Netherlands, where gas extraction led to increasing quakes affecting residents, has turned the area into a vital ‘natural laboratory’ for understanding how human actions can trigger seismic events. As societies transition to sustainable energy sources like geothermal energy or carbon capture and storage, understanding and mitigating induced seismicity is critical for safe and responsible subsurface use. The learnings from Groningen directly inform how to assess and manage risks for future energy projects.

The Future of Earthquake Science

The ultimate goal is to move towards probabilistic seismic hazard assessments based on fundamental physics. This means estimating the likelihood of an earthquake of a certain size occurring in a specific area within a given timeframe – similar to how weather forecasts give a percentage chance of rain. While true earthquake prediction (knowing the exact date and time) remains out of reach due to the chaotic nature of fault systems, improved forecasting can provide invaluable information for hazard planning, building codes, and emergency preparedness.

By integrating diverse data – from millions of years of tectonic motion to millisecond-scale ground vibrations and the subtle vertical shifts detected by satellites – and leveraging cutting-edge computing, the RESET project is taking an important step forward. This research holds the potential to provide societies with better tools to understand and prepare for the powerful forces shaping our planet, ultimately helping to reduce the devastating impact of future earthquakes.

Learn more about the fascinating world of earth science and ongoing research into natural hazards.