China Earthquake Administration

Fluid-soil-structure interaction under oblique seismic incidence: Mechanisms governing offshore wind turbine foundation demand

Offshore wind turbines (OWTs) are located in marine environments where seawater, soft sediments and a stratified seabed modify incident seismic waves through reflection, refraction and conversion between P- and SV-wave (P/SV) modes, changing the amplitude, frequency content, and...

Mechanical Irreversibility and Strength Overcompensation in a Gypsum Dehydration–Rehydration Cycle

Abstract Dehydration–rehydration reactions of hydrous minerals modify rock strength, fluid transport, and deformation in reactive geological environments. Although dehydration‐induced weakening is widely studied, the mechanical consequences of subsequent rehydration remain poorly...

A 3D Finite-Element Workflow for Mapping Earthquake Nucleation Tendency Under Tectonic Loading in Embedded Frictional Fault Systems

Abstract Dynamic-rupture simulations commonly prescribe rupture initiation, which complicates assessment of where instability would preferentially localize for a given fault geometry and tectonic loading. We present a 3D finite-element workflow that maps relative nucleation tende...

Substructural shake table tests examining the seismic performance of point-supported glass facades

This paper aims to investigate the seismic performance of the coupled system comprising a large-span spatial structure and point-supported glass facades (PSGFs) through substructural shake table tests. A two-story substructure testbed is proposed to replicate the target responses...

Major-Earthquake Recurrence Patterns on Active Faults in Yunnan Province, China

ABSTRACT Earthquake forecasting along active faults is important for reducing future seismic losses, especially in active zones such as Yunnan Province. However, the major earthquake recurrence patterns of faults in Yunnan remain understudied, and the time-dependent probabilities...

Dynamic Response of Saturated Kaolin Clay under Repeated Impact Loading

The dynamic response mechanism of clayey foundations under impact loading remains insufficiently understood. This study investigates the dynamic behavior of saturated kaolin clay under repeated one-dimensional impacts using an improved Split Hopkinson pressure bar (SHPB) apparatu...

Structural performance of offshore wind turbines under wind and seafloor ground motions using a coupled seismic-aerodynamic analysis method

This study proposes a fully coupled seismic-aerodynamic analysis method of offshore wind turbines (OWT) through the modular coupling and bidirectional data exchange, which integrates synthesized seafloor ground motions, steel damage evolution model, and soil-structure interaction...

Seismic Risk Assessment of Elevator Entrapment in Urban Buildings

Abstract When an earthquake occurs, elevators are highly susceptible to damage, leading to people being trapped and posing significant challenges to emergency rescue. This paper proposes a method for assessing the number and distribution of elevator-trapped individuals in urban a...

Performance and Mechanism of an Alkali-Activated Multifunctional Curing Agent for Silt Solidification

In light of its curing and green environmental protection effects, the application of an alkali-activated multifunctional curing agent was undertaken for the remediation of silt in coastal areas. In this paper, the curing effect and curing mechanism of cement–phosphogypsum–fly as...

The Influence of Moho Reflection on Ground Motion: A Case Study of the 2023 Ms 4.7 Pulandian, Liaoning, Earthquake

Abstract The significant amplification of ground-motion records associated with Moho-reflected S waves (SmS) has been well documented in previous studies. The deployment of the Chinese earthquake early warning system has provided denser station coverage, enabling deeper investiga...

Near-fault seafloor ground motions: A pure time-domain analytical solution to the 2D marine Lamb problem

This study investigates the two-dimensional marine Lamb problem and near-field wavefield mechanisms based on a pure time-domain analytical solution. First, utilizing the Cagniard-de Hoop method, the closed-form pure time-domain displacement Green's functions excited by a 2D point...

Nuclear tests at Mt. Mantap have reactivated intraplate faults

Underground nuclear explosions typically produce short-lived seismic sequences that decay rapidly after testing ceases. By contrast, seismicity near the Punggye-ri nuclear test site at Mt. Mantap in the Democratic People’s Republic of Korea has persisted and intensified for years...

Research on Game-Theoretic Behavior of Collective Emergency Evacuation in Wildfire Under the Drive of Individual Risk Perception

The increasing frequency of wildfires has made large-scale collective emergency evacuation increasingly critical. However, existing studies provide limited understanding of how information structures shape the interaction between individual risk perception and collective evacuati...

3D Subduction Interface Model for the Hikurangi Margin, New Zealand: Implications for Slow Slip Events

Abstract We present a new 3D Hikurangi subduction interface model by using an implicit modeling approach that integrates seismic‐reflection profiles, relocated hypocenters, focal mechanism orientations, and tomographic interpretations. The model reveals along‐strike transitions i...

Seismic Radial Anisotropy of the Southern Tibetan Rifts From Ambient Noise Adjoint Tomography: Basal Shear and Localized Crustal Weak Zones Promote Rifting

Abstract North–south‐trending rifts in southern Tibet record E–W extension within the Tibetan Plateau, closely linked to high gravitational potential energy from collisional thickening and northward underthrusting of the Indian lower crust. To reveal how basal shear is transmitte...

Contrasting mechanisms of present-day vertical deformation along the northeastern Tibetan Plateau: Insights from 3-D viscoelastic modeling

Summary The northeastern margin of the Tibetan Plateau exhibits pronounced spatial variations in present-day vertical crustal deformation, yet the mechanisms controlling these differences remain debated. In particular, contrasting uplift patterns are observed between the Liupansh...

Multi-Temporal UAV Observations of Post-Seismic Surface Collapse Evolution Following the 2026 M5.2 Liuzhou Double Earthquake in a Karst Terrain, Guangxi Province, China

On 18 May 2026, a M5.2 double earthquake struck the Taiyangzhen area of Liunan District, Liuzhou City, Guangxi, China, triggering shallow surface collapses in this karst terrain. We conducted three UAV orthophoto surveys of the meizoseismal area on 20 May, 23 May, and 24 May, and...

Scenario-based physically informed assessment of rainfall- and earthquake-induced landslide failure probability across China

Abstract Background Landslides are among the most widespread and destructive geological hazards in China, driven by complex mechanisms involving multiple interacting factors. Their impacts are particularly severe when intense rainfall and strong ground motion occur in combination...

Super-resolution downscaling of WRF-based typhoon wind fields over complex coastlines using a decoupled physics-guided U-Net

Accurate kilometer-scale typhoon wind fields are important for coastal hazard assessment, but Weather Research and Forecasting (WRF)-based dynamical downscaling remains computationally expensive, while traditional statistical methods often fail to capture localized topographic ef...