O_1_14 — Sprites, Elves, and Blue Jets: Upper Atmosphere Transient Luminous Events

Transient Luminous Events (TLEs) are a family of large-scale optical and electrical phenomena occurring in the upper atmosphere (stratosphere, mesosphere, and lower ionosphere, ~20-100 km altitude) above active thunderst

O_1_12 — The Hum: Worldwide Low-Frequency Acoustic Anomaly

"The Hum" refers to a persistent, low-pitched, droning noise perceived by a small but significant percentage of the population (estimated 2–11% depending on the locality and study) in diverse locations worldwide. The Hum

O_1_13 — South Atlantic Anomaly: Geomagnetic Weakness and Radiation Belt Gap

The South Atlantic Anomaly (SAA) is the largest known weakness in Earth's magnetic field, centered over South America and the South Atlantic Ocean (roughly between Brazil and southern Africa), where the inner Van Allen r

O_1_16 — Geomagnetic-Consciousness Mechanism

The hypothesis that Earth's geomagnetic field influences human consciousness encompasses several distinct mechanisms: biogenic magnetite in the brain as a magnetoreceptor, Schumann resonance coupling with neural oscillat

O_1_08 — Aurora Borealis and Geomagnetic Storms

The aurora borealis (northern lights) and aurora australis (southern lights) are luminous atmospheric phenomena caused by charged particles from the solar wind interacting with Earth's magnetosphere and exciting atmosphe

O_1_22 — Atmospheric Electricity & Sprite Phenomena

Atmospheric electricity encompasses the entire electrical system of Earth's atmosphere — from the fair-weather electric field (~100–150 V/m at the surface, maintained by the ~2,000 concurrent thunderstorms globally) to t

O_1_00 — Geomagnetic Atmospheric: Subfolder Summary

O_1_03 — Geomagnetic Anomalies and Human Health Effects

Earth's geomagnetic field is not uniform — dramatic anomalies like the South Atlantic Anomaly (SAA) expose organisms and technology to increased radiation, while laboratory experiments have shown that weak magnetic field

O_2_05 — Tektites and Meteorite Impact Glass

Tektites are natural glassy objects formed when hypervelocity meteorite impacts melt and eject terrestrial target rock, which solidifies during flight through the atmosphere and lands hundreds to thousands of kilometers

O_2_04 — Geological Hotspots and Mantle Plumes

Geological hotspots are locations where anomalously high volcanic activity occurs away from tectonic plate boundaries — the dominant hypothesis explains them as surface expressions of mantle plumes, columns of hot, buoya

O_2_13 — Isostatic Rebound: Post-Glacial Land Rise and Coastal Change

Glacial isostatic adjustment (GIA, commonly called isostatic rebound or post-glacial rebound) is the ongoing process by which Earth's crust and mantle adjust to the removal of the immense weight of continental ice sheets

O_2_12 — Great Rift Valley: Continental Splitting and Hominid Cradle

The East African Rift System (EARS) — commonly called the Great Rift Valley — is one of Earth's most geologically dramatic and scientifically significant features: an active continental rift zone stretching approximately

O_2_06 — Richat Structure — Saharan Eye and Atlantis Claims

The Richat Structure (also called the Eye of the Sahara or Guelb er Richat) is a prominent circular geological formation approximately 40–50 km in diameter located on the Adrar Plateau in west-central Mauritania (21°07′N

O_2_01 — Volcanism, Supervolcanoes, and Geological Catastrophism

Volcanic eruptions are among the most powerful forces on Earth, capable of altering global climate, triggering mass extinctions, collapsing civilizations, and imprinting themselves on human mythology for millennia. The T

O_2_11 — Impact Craters: Chicxulub, Vredefort, Sudbury, and Crater Morphology

Impact craters — circular depressions formed by the hypervelocity collision of asteroids, comets, or meteoroids with planetary surfaces — are among the most geologically significant features on Earth and throughout the s

O_2_00 — Geological Tectonic: Subfolder Summary

O_2_15 — Moeraki Boulders & Septarian Concretions

The Moeraki Boulders (Te Kaihinaki in Māori) are a group of approximately 50 large, near-spherical septarian concretions exposed on Koekohe Beach, near Moeraki on the Otago coast of New Zealand's South Island. Ranging fr

O_2_08 — Weathering, Erosion, and Deep Time Landscape Evolution

Weathering (the in-situ breakdown of rock and minerals) and erosion (the transport of weathered material by water, wind, ice, and gravity) are the fundamental surface processes that, operating over deep time (millions to

O_2_16 — Mineralogy and Petrology

Mineralogy — the study of minerals (naturally occurring, inorganic crystalline solids with definite chemical composition) — and petrology — the study of rocks (aggregates of minerals) — together provide the foundation of

O_4_13 — Rainbow Mountains: Zhangye Danxia and Chromatic Geology

The world's "Rainbow Mountains" — strikingly multicolored geological formations displaying vivid bands of red, orange, yellow, green, blue-gray, and white rock — represent some of Earth's most visually spectacular natura