Results 41 to 50 of about 364 (135)

Investigating volcanic hazard in Cape Verde Islands through geophysical monitoring: network description and first results [PDF]

Natural Hazards and Earth System Sciences, 2014
We describe a new geophysical network deployed in the Cape Verde Archipelago for the assessment and monitoring of volcanic hazards as well as the first results from the network. Across the archipelago, the ages of volcanic activity range from ca.
B. Faria, J. F. B. D. Fonseca
doaj   +1 more source

New 2010 Maule Aftershock Catalog Reveals Structure of the Deep Subduction Interface

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 8, August 2026.
Abstract On 27 February 2010, a Mw 8.8 earthquake occurred near Maule in south‐central Chile. The subsequent rapid deployment of a dense network of seismic stations on land was able to capture the first year of its aftershock sequence. Here, we revisit this data set using picking Artificial Intelligence tools, a 3D velocity model of the region and ...
C. Chalumeau, A. Rietbrock
wiley   +1 more source

Probing Slow Earthquakes With Deep Learning

Geophysical Research Letters, 2020
Slow earthquakes may trigger failure on neighboring locked faults that are stressed sufficiently to break, and slow slip patterns may evolve before a nearby great earthquake.
Bertrand Rouet‐Leduc, Claudia Hulbert, Ian W. McBrearty, Paul A. Johnson   +3 more
doaj   +1 more source

Evolution of Tectonically Accreted Topmost Oceanic Lithospheric Mantle Based on Seismic Tomography Constraints at the Ultraslow‐Spreading Southwest Indian Ridge

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract Oceanic lithosphere formed at the global mid‐ocean ridge system makes up >60% of Earth's solid surface. Its uppermost ∼6 km are accreted either magmatically, where mafic melt is available, or tectonically, where this melt is absent. The magmatically accreted lithosphere is known to evolve with age, as demonstrated by its velocity increase ...
A. Corbalán, M. R. Nedimović
wiley   +1 more source

Temporal Changes in the Earth's Outer Core From Nuclear‐Test PKP Waves

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 8, August 2026.
Abstract We investigate temporal changes in P‐wave velocity in the outer core using short‐period PKP waves generated by underground nuclear tests conducted in French Polynesia and recorded at seismic station BRVK in Kazakhstan. The observed first arriving PKP phase cannot be explained by ray theory.
Ying Zhou
wiley   +1 more source

Tectonic Tremor Explained by Successive Ruptures of Clustered Quartz‐Filled Shear Veins

Geophysical Research Letters
A tectonic tremor is a successive seismic signal observed along plate boundaries in subduction zones. However, the source processes and mechanisms responsible for the tremor remain unclear. Quartz‐filled shear and extension veins are clustered in tens to
S. Yabe, K. Ujiie
doaj   +1 more source

Llaima volcano dataset: In-depth comparison of deep artificial neural network architectures on seismic events classification

Data in Brief, 2020
This data manuscript presents a set of signals collected from the Llaima volcano located at the western edge of the Andes in Araucania Region, Chile. The signals were recorded from the LAV station between 2010 and 2016.
João Paulo Canário, Rodrigo Fernandes de Mello, Millaray Curilem, Fernando Huenupan, Ricardo Araujo Rios   +4 more
doaj   +1 more source

The Impact of Data Resolution on Planetary Compressional Structure Analysis

Journal of Geophysical Research: Planets, Volume 131, Issue 8, August 2026.
Abstract Planetary studies of compressional structures are fundamental for understanding the tectonics and thermal evolution of planetary bodies. Compressional features are commonly characterized by their morphology, which in turn is strongly dependent on the spatial resolution of topographic data.
F. Carboni
wiley   +1 more source

Enhanced deep learning approach for detecting and locating tectonic tremors in the Nankai subduction zone

Earth, Planets and Space
Tectonic tremors are key indicators of slow-slip phenomena, and detecting them accurately is a challenging task. Conventional techniques often fail to detect tremors during periods of intense tremor activity.
Yuya Jinde, Amane Sugii, Yoshihiro Hiramatsu   +2 more
doaj   +1 more source

Aeromagnetic mapping of fault architecture along Lagos–Ore axis, southwestern Nigeria

Open Geosciences, 2020
A seismic wave is released when there is sudden displacement on a fault plane. The passage of this wave along the fault plane or within the lithosphere could result in ground shaking or vibration at the surface of the Earth.
Oladejo Olagoke Peter, Adagunodo Theophilus Aanuoluwa, Sunmonu Lukman Ayobami, Adabanija Moruffdeen Adedapo, Enemuwe Charity Adaeze, Isibor Patrick Omoregie   +5 more
doaj   +1 more source