Reference Terms
from Wikipedia, the free encyclopedia
Megatsunami
Megatsunami (often hyphenated as mega-tsunami, also known as iminami or "wave of purification") is an informal term used by popular media and popular science to describe a very large tsunami-like wave significantly beyond the size reached by tsunamis (typically around 10 meters).
Related Stories
1
2
Earth & Climate News
September 8, 2025
Sep. 7, 2025 — Cambridge scientists discovered that thin, weak zones in Earth’s plates helped spread Iceland’s mantle plume across the North Atlantic, explaining why volcanic activity once spanned thousands of kilometers. These ancient scars not only shaped ...
Sep. 7, 2025 — Every year, Panama’s Pacific coast benefits from powerful seasonal winds that drive nutrient-rich waters to the surface, sustaining fisheries and protecting coral reefs. But in 2025, for the first time in at least four decades, this crucial ...
Sep. 6, 2025 — A sweeping new study reveals that humanity has already pushed 60% of Earth’s land outside its safe biosphere zone, with 38% in a high-risk state. By analyzing centuries of data, researchers mapped how human demands on biomass—from farming to ...
Sep. 6, 2025 — Satellite data reveals sea-level rise has unfolded almost exactly as predicted by 1990s climate models, with one key underestimation: melting ice sheets. Researchers stress the importance of refining local projections as seas continue to rise faster ...
Sep. 5, 2025 — A team of chemists has discovered how to transform PET plastic waste into BAETA, a material that captures CO2 with remarkable efficiency. Instead of ending up as microplastics in the environment, discarded bottles and textiles could become tools to ...
Sep. 5, 2025 — UC Santa Barbara researchers project that human impacts on oceans will double by 2050, with warming seas and fisheries collapse leading the charge. The tropics and poles face the fastest changes, and coastal regions will be hardest hit, threatening ...
Sep. 5, 2025 — Scientists found that Red Sea corals can endure warming seas but grow much smaller and weaken under long-term heat stress. Though recovery is possible in cooler months, rising global temperatures may outpace their resilience, endangering reefs and ...
Sep. 5, 2025 — Seagrass, a vital coastal ecosystem, may be one of the planet’s best natural carbon sponges—but its fate depends on how we manage nutrients like nitrogen and phosphorus. While moderate nutrient input can supercharge seagrass growth and boost ...
Sep. 4, 2025 — A Japanese research team successfully harnessed E. coli to produce PDCA, a strong, biodegradable plastic alternative. Their method avoids toxic byproducts and achieves record production levels, overcoming key roadblocks with creative ...
Sep. 3, 2025 — Past climate assessments let big polluters delay action, placing more burden on smaller nations. A new method based on historical responsibility demands steep cuts from wealthy countries and more financial support for poorer ones. Courts are now ...
Sep. 3, 2025 — Scientists at Northwestern University have developed a groundbreaking nickel-based catalyst that could transform the way the world recycles plastic. Instead of requiring tedious sorting, the catalyst selectively breaks down stubborn polyolefin ...
Sep. 3, 2025 — Snowfall shortages are now destabilizing some of the world’s last resilient glaciers, as shown by a new study in Tajikistan’s Pamir Mountains. Using a monitoring station on Kyzylsu Glacier, researchers discovered that stability ended around ...
Latest Headlines
updated 12:56 pm ET
Sep. 8, 2025 — Once thought to be sailors’ myths, rogue waves gained credibility after a towering 80-foot wall of water struck the Draupner oil platform in 1995. New research shows that these extreme waves ...
Sep. 7, 2025 — Sauropod tooth scratches reveal that some dinosaurs migrated seasonally, others ate a wide variety of plants, and climate strongly shaped their diets. Tanzania’s sand-blasted vegetation left ...
Sep. 4, 2025 — New research reveals that carbon made it possible for Earth’s molten core to freeze into a solid heart, stabilizing the magnetic field that protects our planet. Without it, Earth’s deep interior ...
Sep. 1, 2025 — A new study projects that the Atlantic Meridional Overturning Circulation (AMOC)—the system of currents that includes the Gulf Stream—could shut down after 2100 under high-emission scenarios. ...
Sep. 1, 2025 — Sargassum has escaped the Sargasso Sea and exploded across the Atlantic, forming the massive Great Atlantic Sargassum Belt. Fueled by nutrient runoff, Amazon outflows, and climate events, these ...
Aug. 31, 2025 — A massive global study uncovered a striking paradox: even as total burned land has dropped by more than a quarter since 2002, human exposure to ...
Aug. 31, 2025 — Stanford researchers reveal meandering rivers existed long before plants, overturning textbook geology. Their findings suggest carbon-rich floodplains shaped climate for billions of ...
Aug. 31, 2025 — As the Great Salt Lake shrinks, scientists are uncovering mysterious groundwater-fed oases hidden beneath its drying lakebed. Reed-covered mounds and ...
Aug. 29, 2025 — In 1954, a powerful earthquake shook Northern California near Humboldt Bay, baffling scientists for decades. Most quakes in the region come from the Gorda Plate, but this one didn’t fit the ...
Aug. 28, 2025 — Researchers demonstrated how amino acids could spontaneously attach to RNA under early Earth-like conditions using thioesters, providing a long-sought clue to the origins of protein synthesis. This ...