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25 results for “earthquake simulation”
Three-dimensional numerical simulation of the interseismic and coseismic phases associated with the 6 April 2009, Mw 6.3 L'Aquila earthquake (Central Italy)
<p>Results of the numerical model expressed in terms of nodal stresses, strains and displacements at the end of the interseismic and coseismic phases.</p>
Dynamic weakening in sandstone-derived fault gouges during simulated small-magnitude earthquakes under variable loading and environmental conditions
<p><span>Faults exhibit dynamic weakening during large displacements (>1 m) at seismic slip velocities (>0.1 m/s), but the role of this weakening in small-displacement induced earthquakes (M 3–4), such as those in the Groningen Gas Field (the Netherlands), remains unclear. We conducted seismic slip-pulse experiments on Slochteren sandstone gouges (SSG) using a rotary-shear apparatus to investigate their dynamic behavior. Pre-sheared gouge layers, confined between ~1.5 mm thick sandstone host blocks, were subjected to slip pulses at initial effective normal stresses of 4.9–16.6 MPa and pore fluid pressures of 0.1 and 1 MPa under undrained conditions. Slip pulses reached peak velocities of 1.8 m/s, accelerations up to 42 m/s², and displacements of 7.5–15 cm, using either dry Argon or water as pore fluid at ambient temperatures. Water-saturated gouges showed rapid weakening from a peak friction of ~0.7 to ~0.3, with early dilatancy followed by slower ongoing dilation. In contrast, Argon-filled samples exhibited only subtle weakening. Our findings confirm that water-saturated SSG weakens substantially during slip, with minimal dependence on normal stress, slip acceleration, or displacement, while dry samples do not. Microstructural analysis indicates no systematic relationship between PSZ width and frictional work or power input densities, suggesting that wear or heat production alone does not govern PSZ growth. Instead, thermal pore fluid pressurization, potentially involving water phase transitions at asperity scales, may drive weakening in short-displacement, induced seismic events.</span></p>
Dynamic earthquake rupture simulations to investigate updip rupture of CSZ
<p>Dynamic earthquake rupture simulations to investigate updip rupture of CSZ dataset</p>
Dynamic rupture simulation of the 1833 Songming, Yunnan, China, M 8.0 earthquake: Effects from stepover location and overlap distance
<p>These datasets accompany the western Xiaojiang fault surface coordinates that were used for construction of the fault geometry model, the extrapolated velocity model from Shen et al. (2015), and the observational fault surface slip of the 1833 Songming M 8.0 earthquake in Dynamic rupture simulation of the 1833 Songming, Yunnan, China, M 8.0 earthquake: Effects from stepover location and overlap distance submitted to Earth and Space Science by Yu et al. (2021). The data is structured as follows:</p> <p> </p> <p>Once unzipped the data within the archive are three folders structured as follows: subfolder "extrapolated velocity model" is for the extrapolated velocity model, "fault_coordinates" is for the western Xiaojiang fault surface coordinates and "fault_slip" is for the observational fault surface slip. Inside the first folder, there is one NetCDF file, volume_media.nc. The variable x, y, depth starts from 0 km, 0 km, and 4 km, and ends at 200.70 km, 333.96 km, and -40.52 km; x = 0, y = 0 corresponding to 102°, 24°; x = 200.70, y = 333.96 corresponding to 104°, 26.5°. Inside the second folder, there are three txt files, "wxj_conti.txt" is for the continuous western Xiaojiang fault model, "wxj_qshso.txt" is for the western Xiaojiang fault model with Qingshuihai stepover structure, and "wxj_yzhso.tx" is for the western Xiaojiang fault model with Qingshuihai and Yangzonghai stepover structures. Inside the third folder, there is one txt file, 'fault_surface_slip.txt' is for the observational fault surface slip of the 1833 Songming earthquake with the coordinates.</p>
Supplementary Materials to the paper "Simulation of infrasonic acoustic wave imprints on mesopause airglow layers during the 2016 M7.8 Kaikoura earthquake" by Inchin et al., (2021)
<p>The archive contains datasets, animations, scripts and other supplementary materials to the paper "Simulation of infrasonic acoustic wave imprints on mesopause airglow layers during the 2016 M7.8 Kaikoura earthquake".</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.