A seismic wave is an elastic disturbance that propagates through the Earth or along its surface as a result of sudden stress changes, typically from fault rupture, volcanic activity, or anthropogenic sources such as explosions. Governed by the equations of elastodynamics, seismic waves are categorized into body waves (P and S waves) and surface waves (Rayleigh and Love waves), each with distinct particle motion, dispersion, and attenuation characteristics. Their propagation properties—velocity, amplitude, frequency content, and scattering—are strongly controlled by the elastic moduli, density, anisotropy, and heterogeneity of the medium, making seismic waves a primary observational phenomenon in seismology and Earth structure studies.
One seismometer is often not enough to reliably detect earthquakes or human activity such as underground nuclear tests. Rather, researchers combine readings from seismometers distributed across a small geographic area to ...
Earth Sciences
Jul 2, 2026
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A research group led by Satoshi Ide from the University of Tokyo has demonstrated that classic earthquake generation theory does not hold in areas where the angle at which a tectonic plate dips under another is sufficiently ...
Earth Sciences
Jul 1, 2026
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Earthquakes still arrive without warning. That is the hard truth scientists have been forced to accept, despite a decade of advances in artificial intelligence, satellite monitoring and dense seismic networks.
Earth Sciences
Jul 1, 2026
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As earthquakes struck from California to Venezuela to Japan, millions of people received warnings on their mobile phones, providing critical seconds to seek protection.
Earth Sciences
Jun 26, 2026
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During Norway's first match of the FIFA World Cup against Iraq on June 17, several small vibrations were recorded on the seismometer. A particularly clear signal was observed when Erling Haaland scored.
Earth Sciences
Jun 23, 2026
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In 2011, Japan reeled from the effects of a devastating magnitude 9.0 earthquake. But unnoticed in the chaos resulting from the quake, its major aftershocks and the tsunami it caused, something strange happened. About 16 ...
Earth Sciences
Jun 19, 2026
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Sedimentary basins—depressions in Earth's crust caused by tectonic activity—tend to be flat and are favored places to build cities. But during earthquakes, they can become natural resonance chambers.
Earth Sciences
Jun 15, 2026
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Researchers combining two methods to reconstruct the rupture evolution of the July 2025 magnitude 8.8 Kamchatka earthquake found the rupture from the megathrust event extended about 500 kilometers (311 miles) from its epicenter.
Earth Sciences
Jun 11, 2026
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Researchers have repurposed an AI model designed for visual identification tasks to detect Bryde's whale calls contained within seismic data collected in the South China Sea. The detection system precisely identified calls ...
Ecology
Jun 10, 2026
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Following the devastating urban fire that broke out in Wajima City after Japan's 2024 Noto Peninsula earthquake, investigators struggled to identify a clear ignition source, despite widespread destruction and unusual reports ...
Earth Sciences
Jun 9, 2026
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