seismicity
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Was It an Alien Spacecraft—Or a Delivery Truck?
A Harvard astronomer says a meteor came from beyond our solar system. A new study questions whether his data includes a more obvious explanation.
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California Quake Faults Are Highly Sensitive to Solid Earth Tides, Say Scientists
Oceans have tides, and so does the solid earth. Could they have an effect on earthquake faults? Yes, say scientists, but that doesn’t necessarily mean they cause big quakes.
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Supercomputers Simulate 800,000 Years of California Earthquakes to Pinpoint Risks
Scientists are working to improve their calculations of earthquake danger by combining maps of known faults with the use of supercomputers to simulate potential shaking deep into the future in California.
COP31, the 2026 United Nations Climate Change Conference, aims to advance dialogue, strengthen consensus, and accelerate climate action on a global scale. From November 9–20, 2026 in Antalya, Türkiye, heads of state, ministers, scientists, business leaders, and civil society will gather to advance efforts in emission targets, climate finance, and adaptation and resilience. Once again, our experts, students, and global thought leaders from Columbia Climate School and across Columbia University are contributing to key events, sharing insights, and helping shape the dialogue toward ambitious, science-based solutions. Learn More
