The Groningen Gasquakes: Foreseeable Surprises, Complications of Hard Science, and the Search for Effective Risk Communication
Characterizing Acoustic Signals and Searching for Precursors during the Laboratory Seismic Cycle Using Unsupervised Machine Learning
The December 2018 5.7 and January 2019 5.3 Earthquakes in South Sichuan Basin Induced by Shale Gas Hydraulic Fracturing
3D Model Backprojection of the 2017 8.2 Chiapas Earthquake: A Two‐Stage Rupture with a Barrier‐Induced Velocity Increase
Assessments of the Performance of the 2017 One‐Year Seismic‐Hazard Forecast for the Central and Eastern United States via Simulated Earthquake Shaking Data
Automated Quality Control for Large Seismic Networks: Implementation and Application to the AlpArray Seismic Network
A Crustal Velocity Model for the Peninsular Ranges of Baja California and Southwestern Laguna Salada, Mexico
Shear‐Wave Velocity in the Seattle Basin to 2 km Depth Characterized with the Microtremor Array Method: Insights for Urban Basin‐Scale Imaging
From Earthquake Source Parameters to Ground‐Motion Warnings near You: The ShakeAlert Earthquake Information to Ground‐Motion (eqInfo2GM) Method
Engineering Seismological Parameters of Two 4.3 Intraplate Earthquakes in the Northern Rhine Area, Germany
Broadband (0–5 Hz) Fully Deterministic 3D Ground‐Motion Simulations of a Magnitude 7.0 Hayward Fault Earthquake: Comparison with Empirical Ground‐Motion Models and 3D Path and Site Effect...
Systematic Determination of Focal Mechanisms over a Wide Magnitude Range: Insights from the Real‐Time FMNEAR Implementation in Chile from 2015 to 2017
A Complete Automatic Procedure to Compile Reliable Seismic Catalogs and Travel‐Time and Strong‐Motion Parameters Datasets
Research on Parameter Calculation for the Ogata–Katsura 1993 Model in Terms of the Frequency–Magnitude Distribution Based on a Data‐Driven Approach
Notice of Retraction: Preliminary Analysis of Strong Ground Motions in the Heavily Damaged Zone in Mashiki Town, Kumamoto, Japan, during the Mainshock of the 2016 Kumamoto Earthquake (...
The Central Mongolia Seismic Experiment: Multiple Applications of Temporary Broadband Seismic Arrays
Implementation of a Smoothed‐Seismicity Algorithm in Monte Carlo PSHA Software EqHaz and Implications for Localization of Hazard in the Western Canada Sedimentary Basin
Front: On 16 December 2018, an ML 5.7 earthquake struck Xingwen County, Sichuan Province, China, and on 3 January 2019, an ML 5.3 earthquake occurred 8 km to the west, resulting in extensive damage to nearby structures. Lei et al. (this issue) reports that these earthquakes are the largest and most damaging in the Changning shale gas block, where 11 ML ≥ 4.0 events (including three ML ≥ 5.0) have been observed since hydraulic fracturing (HF) began in 2014. A 3D view (top) shows a simplified geological section overlapping with relocated hypocenters for observed earthquakes. The shaded image shows the landscape and well pads in which hydraulic fracturing was performed or is ongoing. The map view (bottom) shows active HF pads and three days of pre- and aftershocks of the 16 December 2018 ML 5.7 earthquake. The shaded area shows the change of Coulomb failure stress (ΔCFS) from the ML 5.7 earthquake to receiver faults of (strike, dip, rake) = (170, 83, 12) and depth of 2 km. ZJ indicates the location of Zhoujia village, which suffered the most extensive damage.
Back: By coincidence (and scaling) the acceleration response spectrum of the 2011 Goch (Germany) earthquake recorded at the 130 m level of the north tower of Cologne Cathedral follows the shape of this World Heritage Monument. Hinzen (this issue) describes the ground motion parameters of two similarly sized local earthquakes (ML 4.3) measured by a 40-station network with several stations with identical epicentral distances, including the five stations in the cathedral.
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