A5101527515- earthquake and tectonic studies
- Earthquake Detection and Analysis
- Seismology and Earthquake Studies
- Underwater Acoustics Research
- Geophysics and Gravity Measurements
- High-pressure geophysics and materials
- Geological and Geochemical Analysis
- GNSS positioning and interference
- Flow Measurement and Analysis
- Inertial Sensor and Navigation
- Underwater Vehicles and Communication Systems
- Seismic Waves and Analysis
- Geophysical Methods and Applications
- Ionosphere and magnetosphere dynamics
- Scientific Measurement and Uncertainty Evaluation
- Seismic Imaging and Inversion Techniques
- Geophysics and Sensor Technology
- Geophysical and Geoelectrical Methods
- Indoor and Outdoor Localization Technologies
- Methane Hydrates and Related Phenomena
- Geological and Geophysical Studies
- Seismic Performance and Analysis
- Geoscience and Mining Technology
National Earthquake Response Support Service
2018-2024
China Earthquake Administration
2016-2023
China Jiliang University
2023
Institute of Geology, China Earthquake Administration
2016-2022
Changchun University of Science and Technology
2022
Hangzhou Institute of Applied Acoustics
2008-2011
Abstract The slip rate and its spatial variations of the Kunlun fault (KLF) play important roles in tectonic evolution northeastern Tibetan Plateau. Here Tuosuo Lake (TL) segment KLF, which remains controversial from various geological observations, is investigated with a dense Global Positioning System observation profile. With viscoelastic earthquake‐cycle deformation model, TL estimated to be 5.5 ± 0.7 mm/a , comparison an overestimated value 9.2 1.1 elastic model. Combined previous...
SUMMARY A major earthquake shook the Chinese county of Maduo, located in Songpan-Ganzi terrane on Tibetan Plateau, 21 May 2021. Here, we investigate post-seismic deformation process this event, with aim to understand fault geometry, friction behaviour and regional rheology. To keep self-consistency between co- models, first constrain geometry coseismic slip model which are directly used modelling deformation. The coseimsic reveals that majority is confined at middle (3–15 km) brittle layer,...
On January 21, 2016, a strong earthquake with magnitude of Ms6.4 occurred at Menyuan, Qinghai Province China. In almost the same region, there was another happened in 1986, similar and focal mechanism. Based on comprehensive analysis regional active faults, mechanism solutions, precise locations aftershocks, as well GPS crustal deformation, we inferred that Lenglongling fault dips NE rather than SW suggested by previous studies. Considering facts 2016 1986 Menyuan earthquakes are closely...
A description is given of the COOMET project 473/RU-a/09: a pilot comparison hydrophone calibrations at frequencies from 250 Hz to 200 kHz between Hangzhou Applied Acoustics Research Institute (HAARI, China)—pilot laboratory—and Russian National for Physicotechnical and Radio Engineering Measurements (VNIIFTRI, Designated Russia CIPM MRA). Two standard hydrophones, B&K 8104 TC 4033, were calibrated compared assess current state calibration HAARI (China) Russia. Three different methods...
While seasonal hydrological mass loading, derived from Gravity Recovery and Climate Experiment (GRACE) measurements, shows coherent spatial patterns is an important source for the common mode error (CME) in continuous global positioning system (cGPS) measurements Yunnan, it a challenge to quantify local effects detailed changes daily GPS by using GRACE data due its low time resolutions. In this study, we computed compared two groups of CMEs nine cGPS sites northwest Yunnan province; rCMEs...
On January 21, 2016, a strong earthquake with magnitude of Ms6.4 happened at Menyuan, Qinghai Province China. In almost the same place, there was another in 1986, similar and focal mechanism. this paper, we analyze characteristics regional crustal deformation before 2016 Menyuan by using data from 10 continuous Global Positioning System (GPS) stations 74 campaign-mode GPS within 200 km event: (a) Based on velocity field over ten years observations, strain rate is calculated. The results...
Induced polarization (IP) effects in transient electromagnetic (TEM) measurement play a significant role the detection of minerals, such as sulfide ore, clay etc. However, due to complex impacts caused by parameters, structure earth, and system configuration, IP cannot be easily measured interpreted. We paid more attention vertical component ungrounded-TEM previous work; however, we will now attempt utilize horizontal enhance precision interpretation. quantitatively discussed behavior...
Rapid acquisition of the kinetics deformation field and seismic intensity distribution large earthquakes is crucial for postseismic emergency rescue, disaster assessment, future risk research. The advancement GNSS observation data processing makes it play an important role in this field, especially high-frequency GNSS. We used differential positioning method to calculate 1 HZ from 98 sites within 1000 km MS7.4 Maduo earthquake epicenter. by using peak ground velocity derived displacement...
Abstract The 2021 Ms 6.4 Yangbi earthquake, Yunnan, China, was recorded by the Dali Global Positioning System (GPS) network comprising 37 permanent stations within 100 km of epicenter. All these GPS 1 Hz data, and 12 them also 5 data. Using sophisticated data processing strategies, especially method to overcome ionospheric multipath errors, near-field waveforms epoch-by-epoch displacement all an epicentral distance ∼50 were derived from high-rate observations with a root mean square error...
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2017年8月8日的九寨沟MS7.0地震发生在岷江断裂、塔藏断裂及虎牙断裂交汇地区，地处青藏高原东北部的川甘交界地区，位于巴颜喀拉地块的东缘，地质构造复杂，对于九寨沟地震震中位置和发震断层的确定，存在不同意见.本文利用GNSS及升降轨InSAR观测，在获取九寨沟地震同震形变场的基础上，基于均匀弹性半无限位错模型，联合反演了发震断层的滑动分布模型，并计算了同震库仑应力变化.InSAR同震形变场显示，视线向最大沉降量和抬升量分别为0.21 m和0.16 m，形变场长轴为NW向，形变主要集中在断层西侧.距震中40 km和65 km的九寨和松潘两县，水平向的GNSS同震位移分别达14.31 mm和8.22 mm.联合GNSS和InSAR同震形变场反演得到的滑动分布主要集中在沿走向5~33 km，倾向2~20 km的范围内，平均滑动量为0.18 m，最大滑动量为0.91 m.发震断层长40 km，宽30...
An on-line calibration method for receiving directivity of low-frequency sonar in open water is proposed. Ultra short baseline (USBL) positioning and coordinate transformation technology are used to solve the orientation problems process, respectively. In order improve accuracy, array design optimized by expanding element distance. Linear frequency modulation (LFM) pulse signal pseudo-random coding selected, compression complex correlation ranging accuracy direction finding Simulated...
Abstract: In this paper, both the reciprocal method and optical for calibration of plural sensitivities hydrophones are reviewed firstly. Then an experimental system is introduced in which with a 1.5MHz focusing transducer acting as position indicator, phase responses can be calibrated easily accurately. Measurements carried out different types results given frequency range 20kHz to 400kHz. Finally, included construction transfer function receiving system, acoustic waveforms produced by...