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Automated, Near Real‐Time Ground‐Motion Processing at the U.S. Geological Survey
Sediment thickness map of United States Atlantic and Gulf Coastal Plain Strata, and their influence on earthquake ground motions
New Magnitude–Area Scaling Relations for the New Zealand National Seismic Hazard Model 2022
‘THE NUCLEAR SITING CONTROVERSY’ IN 1970S ITALY: HISTORICAL PERSPECTIVES ON GEOLOGY, NUCLEAR POWER AND RADIOACTIVE WASTE
MILITARY GEOLOGY: AN AMERICAN TERM OF WORLD WAR I RE-DEFINED FOR THE BRITISH ARMY AT THE END OF WORLD WAR II
Abstract Today's geoscience challenges often require repurposing of data and samples from legacy boreholes. Collection of new deep core is expensive; maximizing this investment is vital. However, the condition of legacy cores varies due to factors including recovery, sampling, lithology, and storage. Rock Quality Designation analysis is often undertaken on new core but this only provides a snapshot of core condition and will not be indicative of subsequent condition. Poor core condition can make destructive analytical techniques impossible and also impacts non-destructive techniques including core scanning. Since 2011, BGS have systematically collected 125 000 core images. This study investigates if core condition of this archive can be assessed using automated analysis by machine learning. A neural network-based approach was used to segment these images. By differentiating imaged core from their background, properties such as number of fragments and total rock area were determined and used to assess core condition. Analysis of outputs demonstrates that with minimal input data, core condition can be rapidly assessed. This allows users to better understand and visualize core. This can be used to qualitatively assess non-destructive data, improve success of destructive sampling through targeted sampling and reduce the time and effort spent interacting with physical material.
U.S. Geological Survey Core Research Center: a gateway to subsurface discovery for geoscience research
Abstract The U.S. Geological Survey (USGS) operates the Core Research Center (CRC) in Denver, Colorado, USA, a public access repository of rock cores from over 9800 wells and drill cuttings from over 53 000 wells, primarily from states in or adjacent to the Rocky Mountain Region. Annually, approximately 1400 visitors use the collection for traditional and innovative research. The CRC has an online, searchable database which includes downloadable core photos, analytical data, and thin-section images. When visitors sample for analyses, the results must be returned to the CRC for public dissemination providing immediate, free access to users while sparing the finite, irreplaceable collection from redundant testing. A representative quantity of every core depth is preserved in perpetuity. Studies on CRC materials, paired with new extraction methods, have unlocked new productive deposits. Materials drilled and curated decades ago remain in high demand while materials receiving little attention today may be crucial for future research. The collection provides immediate, inexpensive access to subsurface materials at a fraction of the cost of new drilling, sparing money, time and environmental impacts.
H. P. Seebaiya (1929 – 2023)
Uses of epistemic uncertainties in the USGS National Seismic Hazard Models
PROMOTING MILITARY GEOLOGY FOR 200 YEARS: SENIOR GEOLOGISTS OF THE BRITISH ARMY 1826 TO 2026
Development of a companion questionnaire for “Did You Feel It?”: Assessing response in earthquakes where an earthquake early warning may have been received
A DesignSafe earthquake ground motion database for California and surrounding regions
The geological-event reference system, a step towards geological data harmonization
RECORDING THE FACTS: HENRY DE LA BECHE’S MAPS AS DATA REPOSITORIES
Geological mapping of coastal and offshore Japan (by GSJ-AIST): collecting and utilizing the geological information
Abstract Devastating earthquakes and tsunamis capable of causing catastrophic damage to human societies and economies have frequently occurred on and around the Japanese islands. Because Japan is a long and narrow island arc in the Pacific Ocean located at the junction of four plates (the Eurasian and Philippine Sea Plates in the SW and the North America and Pacific Plates in the NE), it has probably suffered the highest number of earthquake and tsunami events anywhere in the world. Hence, geological and geoinformation investigations are supremely important, not only for understanding the geological development of Japan but also for forecasting the risks associated with geohazards and securing the safety of human lives and infrastructures. For these reasons, the Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (GSJ-AIST) has been conducting marine geological surveys since 1974 and, as of the end of 2019, produced a Marine Geology Map Series consisting of 90 geological maps. In addition, a coastal zone research project that aims to connect marine, coastal and land area geoinformation seamlessly was launched in 2008 to survey areas that have not yet been investigated, and six maps of geologically distinct areas have already been published based on that collected data.