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781 results for “earthquakes”
Temporal changes of the stress regime in the seismogenic zone of the 2015 Gorkha Earthquake
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Data for "Quantifying the influence of topographic amplification on coseismic landslides: Insights from the 2015 Gorkha Earthquake"
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Accurate prediction of the 2022 MS 6.9 Menyuan and MS 6.8 Luding earthquake epicentres
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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>
SNP analyses reveal a diverse pool of potential colonists to earthquake‐uplifted coastlines
<p>In species that form dense populations, major disturbance events are expected to increase the chance of establishment for immigrant lineages. Real-time tests of the impact of disturbance on patterns of genetic structure are, however, scarce. Central to testing these concepts is determining the pool of potential immigrants dispersing into a disturbed area. In 2016, a 7.8 magnitude earthquake occurred on the South Island of New Zealand. Affecting approximately 100 km of coastline, this quake caused extensive uplift (several metres high), extirpating many intertidal populations, including keystone intertidal kelp species. Following the uplift, we set out to determine the geographic origins of detached kelp specimens which rafted into the disturbed zone. Specifically, we used genotyping-by-sequencing (GBS) approaches to compare beach-cast southern bull-kelp (Durvillea antarctica and D. poha) samples to established populations throughout the species' ranges, and thus infer the geographic origins of potential colonists reaching the disturbed coast. Our findings reveal an ongoing supply of diverse lineages dispersing to the newly uplifted coastline, suggesting potential for establishment of 'exotic' lineages following disturbance. Furthermore, we found that some drifting individuals of each species came from far-distant regions, some >1200 km away. These results show that diverse lineages – in many cases from very distant sources – have potential to compete for new space in the wake of an exceptional disturbance event, illustrating the potential of long-distance dispersal as a key mechanism for re-assembly of coastal ecosystems. Furthermore, our findings demonstrate that high-resolution genomic baselines can be used to robustly assign the provenance of dispersing individuals.</p>
Data from: Global induced stress field from large earthquakes since 1900 and chained earthquake occurrence
<p>Great earthquakes produce significant damages over large areas. The timely identification of impending earthquakes is crucial for seismic hazard mitigation. We assess the stress induced from neighboring earthquakes for 120 years around the circum-Pacific plate boundaries. Large earthquakes perturbed the stress fields. We analyze 1,636 earthquakes with moment magnitudes greater than or equal to 6.4 in 1900-2020. The cumulative Coulomb stress changes reach up to the order of tens to hundreds of bar at the plate boundaries. Large earthquakes followed in the regions with large lateral gradients of cumulative Coulomb stress changes induced by precedent earthquakes. Laterally heterogeneous stress fields may play an important role in nucleation of great earthquakes.</p>
Dynamic earthquake rupture simulations to investigate updip rupture of CSZ
<p>Dynamic earthquake rupture simulations to investigate updip rupture of CSZ dataset</p>
Probing slip distribution of the 1714 Bhutan earthquake based on interseismic model: implications for seismic hazard
<p>Probing slip distribution of the 1714 Bhutan earthquake based on interseismic model: implications for seismic hazard</p>
The coseismic and post-seismic deformation of 2020 Nima earthquake obatined by InSAR
<p>The two zip files contain the co-seismic deformation and accumulated post-seismic deformation (line of sight ) of ascending and descending orbits of the 2020 Nima earthquake observed by Sentinel-1. The units of co-seismic and post-seismic deformation are meter and millimeter respectively. The positive value is motions to the satellite, and the negative value is motins away from the satellite.</p> <p>If you have any questions about this data, please contact me via <a href="mailto:gaohuastudent@163.com">gaohuastudent@163.com</a>.</p>
Phase picks for Raton Basin earthquakes 2016-2020
<p>This dataset contains earthquake phase arrival information for both broadband seismometers and nodal geophones deployed from 2016 to 2020 in the Raton Basin. The Raton Basin is located on the Colorado-New Mexico border. For more details on the workflow that led to the development of the dataset please see the Glasgow et al. (2021) publication. A ReadMe with dataset details is included in the download. </p>
Geochemical characteristics of geofluids from natural springs and soil gases, Menyuan Ms 6.9 earthquake, NW China
<p>This release archives Data files for Geochemistry of natural springs and soil gases around the epicenter of Menyuan Ms 6.9 earthquake on January 8, 2022, NW China</p>
Template matching earthquake catalog from the 1st of January 2009 to the onset of the 2016 Central Italy sequence (24th of August 2016)
<p>Earthquake catalog obtained using the template matching technique from the 1<sup>st</sup> of January 2009 to the onset of the 2016 Central Italy sequence (24<sup>th</sup> of August 2016): it corresponds to a list of earthquake locations with magnitude estimation; the average cross correlation, the threshold, the associated template and the number of channels above the cross correlation threshold are indicated as well. Other details in Sugan et al., 2023.</p> <p>Sugan, M., Campanella, S., Chiaraluce, L., Michele, M., & Vuan, A. (2023). The unlocking process leading to the 2016 Central Italy seismic sequence. Geophysical Research Letters, 50, e2022GL101838. https://doi.org/10.1029/2022GL101838.</p>
Template match catalog for 2022 Ferndale earthquake sequence
<p>Template match catalog for 2022 Ferndale earthquake sequence</p>
2011 Japan Earthquake Survivor's Perspective Story
<p>Title: The Great East Japan Earthquake story told from the perspective of one family<br> Narrative: The reconstruction plan was decided immediately after the disaster; there is a disparity between what people wanted then and what they want now.</p>
Automated Earthquake Catalogue for SIEMBRA & ESP networks in South America (Pampean Flat Slab)
<p>This repository includes:</p> <p>1. A gzipped automated catalogue of earthquake locations with P and S arrival times for the SIEMBRA and ESP networks in South America</p> <p>2. A README explaining the information in each column </p>
Earthquake catalogue for the Taupō region: 2010–2019
<p>This deposit contains the earthquake catalogue described in "A Decade of Earthquake Activity at Taupō Volcano, New Zealand" by Illsley-Kemp et al., published in <em>Volcanica: </em><a href="https://doi.org/10.30909/vol.05.02.335348">https://doi.org/10.30909/vol.05.02.335348</a></p> <p>If you use this dataset please cite this paper appropriately</p> <p>Events that have been identified as false detections, caused by distance large magnitude earthquakes are flagged by event_type='other event'</p>
Injection data within 25 km of the 2020 M5.0 Mentone earthquake
<p>Injection data within 25 km of the 2020 M5.0 Mentone earthquake</p>
Tension- Aspect Effect of Earthquake-triggered Landslides
<p>Date for paper titled Tension- Aspect Effect of Earthquake-triggered Landslides.</p>
Complexities of Extremely Shallow Damaging Earthquakes as Evidence for Seismogenic Intersecting Faults in Low Seismicity Regions Unloaded by Erosion
<p>The Seismic data used in this paper for inversion Centroid Moment Tensor and First Motion Mechanism</p>
The 6 February 2023 M7.8 & M7.6 earthquake ruptures mapped with InSAR
<p><strong>Data Supporting Text</strong></p> <p>We used C-band SAR (Sentinel-1) data in order to extract information about the ground displacements that occurred due to the M<sub>w</sub>=7.8 earthquake and M<sub>w</sub>=7.6 earthquake in southeast Turkey (Türkiye). We retrieved the satellite data from the Alaska Satellite facility and from the Copernicus Hub of ESA. We used differential SAR (DInSAR) and the sub-pixel correlation methods to retrieve the surface motions in LOS direction and in azimuth (along satellite track) direction. We processed the SAR images using the (ISCE) v2 software and we applied pixel offset tracking through the cross correlation of the amplitude of the primary (before the earthquake) and the secondary (after the earthquake) SLC images. The pixel offset method gave us the capability to map the surface rupture extent of the strike-slip fault segments along the East Anatolian Fault Zone (EAFZ) and the Sürgü fault (SF). Also, we identified the splay fault known as Nurdağı-Pazarcık fault (NPF; Melgar et al. 2023) where the rupture process began and a second splay fault in the area of Adiyaman near the main trace of EAFZ. We mapped the total rupture length of the EAFZ which is ~ 400 km. We suggest that the maximum displacement was ~ 7 m in line of sight (LOS) direction (central area of EAFZ and SF). Also, the maximum displacement of the NPF was found ~ 1 m. It is necessary to clarify that the total displacement field occurred by the combined motion of the two mainshocks, as well as, possibly by some large-magnitude aftershocks.</p> <p><strong>Acknowledgments </strong></p> <p>This research was supported by the Hellenic Foundation for Research and Innovation (HFRI) under the 3rd Call for HFRI PhD Fellowships (Fellowship Number: 05176).</p> <p><strong>References</strong></p> <p>Melgar, D., Taymaz, T., Ganas, A., Crowell, B., Öcalan, T., Kahraman, M., Tsironi, V., Yolsal-Çevikbilen, S., Valkaniotis, S., Irmak, T. S., Eken, T., Erman, C., Özkan, B., Dogan, A. H., & Altuntaş, C. 2023. Sub- and super-shear ruptures during the 2023 Mw 7.8 and Mw 7.6 earthquake doublet in SE Türkiye. Seismica, 2(3). <a href="https://doi.org/10.26443/seismica.v2i3.387">https://doi.org/10.26443/seismica.v2i3.387</a></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.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
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.