The study of Earth’s systems, including its physical structure, natural processes, and interactions between the lithosphere, hydrosphere, atmosphere, and biosphere. Earth sciences investigate phenomena such as weather, earthquakes, and volcanic eruptions to understand our planet’s past, present, and future.
Ancient rocks exposed in southern Africa show that Earth already had oceans, intense volcanism, strong earthquakes, and microbial life more than 3.2 billion years ago. Preserved in the Makhonjwa Mountains of South Africa and Eswatini, these formations provide one of the clearest geological records of early Earth surface conditions.
Before dawn, while most of central Mexico sleeps, a small group of scientists climbs the dark slopes of Popocatépetl, one of the country’s most active volcanoes. Their goal is to recover seismic instruments that, after five years of continuous monitoring, have allowed researchers to construct the first complete three-dimensional image of the volcano’s interior. The model reveals multiple zones where magma accumulates beneath the crater, extending to depths of about 18 km (11 miles), and offers new insight into how Popocatépetl functions and how its eruptions may develop.
When powerful northerly winds swept through Los Angeles on January 7, 2025, they unleashed one of the most destructive urban firestorms in U.S. history. A new study attributes those winds to a rare “jet-forced Santa Ana” pattern — a collision of upper-level atmospheric forces that produced gusts over 35 m/s (80 mph), destroyed more than 16 000 structures, and killed 31 people. The event struck ahead of the first winter rain, after months of near-record dryness that left vegetation tinder-dry.
Wintertime earthquakes along the Australian Antarctic Ridge were found to influence massive summer phytoplankton blooms in the Southern Ocean, according to a Nature Geoscience study published on December 9, 2025.
When a M9.1–M9.3 megathrust earthquake struck northern Sumatra at 00:58 UTC (07:58 local time) on December 26, 2004, it unleashed a basin-wide tsunami that killed more than 227 000 people and transformed global approaches to tsunami warning and coastal preparedness.
Strong nighttime cooling in volcanic valleys produces deep temperature inversions that suppress mixing and allow gases and ash to accumulate in low-lying areas. The timing of morning breakup governs when pollutants disperse, making these atmospheric structures a critical factor in assessing overnight hazards and morning exposure windows.
A detailed analysis of unrest at the Campi Flegrei in southern Italy shows that earthquake swarms since 2005 are governed by cumulative ground uplift rather than time, according to a study published in Scientific Reports on December 5, 2025.
High pressure and high temperature X ray diffraction experiments conducted at PETRA III in Hamburg indicate that seismic anomalies in Earth’s inner core can be explained by chemical layering within iron alloys, according to research published in Nature Communications in December 8, 2025.
Scientists have identified a deep, tilted magmatic structure beneath the Eifel volcanic region in Germany after analyzing data from more than 494 seismic stations deployed between 2022 and 2023.
An international scientific assessment published on December 18, 2025, concludes that the January 15, 2022, eruption of the Hunga Tonga–Hunga Haʻapai volcano caused the most severe stratospheric disruption ever observed in the satellite era, increasing global stratospheric water vapor by about 10%.
