Every few decades, Earth reminds us that beneath its calm surface lies a ticking time bomb. Earthquakes are a question of “when.” And for many parts of the world, that “when” may be closer than we think.
As of 2025, seismologists are closely watching several regions prone to megathrust earthquakes. These powerful quakes are generated when one tectonic plate is forced under another. Among the most dangerous is the Cascadia Subduction Zone, a 600-mile stretch off the Pacific Northwest coast of North America. According to the U.S. Geological Survey (USGS), this zone is capable of producing a magnitude 9.0+ earthquake, along with a massive tsunami. The last such event occurred in 1700. Scientists say the probability of another in the next 50 years is over 37%—an alarming number.
California’s San Andreas Fault is another well-known threat. Experts believe the southern section is “locked and loaded,” overdue for a quake of at least magnitude 7.5. Cities like Los Angeles and San Francisco sit directly in harm’s way, and despite decades of planning, our urban infrastructure is not earthquake-proof.
But the danger isn’t limited to North America. Japan, Indonesia, Turkey, Chile, and regions along the Himalayan belt are all high-risk zones. Each of these locations houses millions of people, billions of dollars in infrastructure, and fragile supply chains that could collapse in the blink of an eye.
Preparedness remains a challenge. While some cities have implemented early warning systems and earthquake-resistant construction, many regions lack the funding, policy support, or public awareness needed to reduce vulnerability. Evacuation routes are often unclear. Emergency supplies are understocked. And crucially, most populations are simply unprepared mentally for the scale of devastation that could occur.
If a megaquake hit tomorrow, would we be ready?
History suggests otherwise. For example, the 2010 Haiti earthquake killed over 200,000 people. The 2004 Indian Ocean earthquake and tsunami claimed 230,000 lives. And Japan’s 2011 Tōhoku earthquake, despite the country’s advanced preparedness, resulted in over 15,000 deaths and triggered a nuclear crisis.
As climate change continues to stress ecosystems and cities, natural disasters like earthquakes will have increasingly catastrophic ripple effects. The world cannot afford to ignore the signs. Food distribution, medical care, communication networks, and energy grids could all fail under seismic stress.
That’s why many scientists, engineers, and futurists are turning their gaze skyward, not to build parallel systems that can support humanity in the event of global emergencies.
One fascinating vision of this concept is explored in the science fiction novel ISS Stargraber by Nicolas Pollet. Set in 2153, it imagines a future where Earth is powered by a 25,000-mile-long orbital station, and society thrives on space-based solar energy. But even in this advanced future, danger lurks. When sabotage threatens the station’s integrity, one man must protect the fragile connection between Earth and its orbital lifeline.
We cannot put all our faith in any one system, not even Earth itself. If we are to survive the next megathrust quake, we must invest in redundancy, resilience, and the bold idea that our future might include living beyond the ground beneath our feet.
And if you’re curious what that future might look like? ISS Stargraber is a powerful, thrilling, and timely place to start.
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