A dedicated hub for timeless, in-depth content on our core scientific disciplines – Earth sciences and Astronomy. Evergreen Science features well-researched articles, comprehensive guides, and insightful analyses designed to remain relevant and valuable over time.
Confused about the difference between a Severe Thunderstorm Watch and a Warning? Learn how these weather alerts help you prepare for dangerous storms, the damage they can cause, and why understanding the difference could be crucial for your safety.
A powerful earthquake struck northern California on April 18, 1906, devastating San Francisco and igniting fires that burned for three days. With an estimated magnitude of 7.9, it remains one of the most destructive seismic events in U.S. history. As the city marks the 119th anniversary today, the earthquake’s legacy continues to inform modern seismology, urban planning, and disaster preparedness.
The aurora borealis forms when charged particles ejected from the Sun during solar storms interact with Earth’s magnetic field and collide with gases in the upper atmosphere. As these energetic particles funnel along magnetic field lines toward the poles, they strike atoms of oxygen and nitrogen, transferring energy that is then released as visible light. This process generates shimmering bands of green, red, and violet light that trace the structure of Earth’s magnetosphere, varying in color depending on the altitude and type of atmospheric gas involved.
What causes the Earth to shake during an earthquake? From shifting tectonic plates to human-triggered tremors, explore the science behind hotspots and other hidden forces. Learn more about how even human actions can cause earthquakes.
