Zhao Guoqiang(G. Q. Zhao)

EMAIL: gqzhao@ief.ac.cn

EDUCATION: Master

TITLE: Associate Professor

ORGANIZATION : China Seismic Experimental Site Data Center (CSESDC)

Institute of Earthquake Forecasting

China Earthquake Administration

ADDRESS: #63 Fuxing Road, Haidian District, Beijing, China

Educational Background

July 2001 - June 2005, Wuhan University, China, Bachelor, Surveying and Mapping Engineering

July 2005 - June 2007, Wuhan University, China, Master, Geodesy and Survey Engineering

Work Experience

July 2007 – Present , China Seismic Experimental Site Data Center (CSESDC)

Institute of Earthquake Forecasting (IEF)

China Earthquake Administration (CEA)

Research

Since I graduated from Wuhan University, I have been working in China Seismic Experimental Site Data Center, Institute of Earthquake Forecasting, China Earthquake Administration. My major is high-precision GNSS data processing and its application on earthquake. I am in charge of the development, running, maintaining of the CSESDC. My main research is as follows: 

The station information of 27 GPS fiducial stations from the crustal movement observation network of China is provided. The GPS data of these stations from 1999 to the end of 2011 are processed by GAMIT/GLOBK software with the unified processing strategies and the updated geophysical models. We calculate the effects caused by coseismic deformation, instrument change and other events. On that basis, we provide the velocity fields of crust movement of China in ITRF2005. 

We calculated coseismic deformations at fiducial stations in China caused by 2011 M9.0 Japan earthquake. The results show that there is obvious coseismic displacement on the stations located in the east especially northeast of China, and the coseismic displacement is in directly proportional to the epicentral distance. The coseismic displacement of the station SUIY (SuiYang) with 3.3cm is maximal. A phenomenon is found in the time series analysis that the speed of horizontal movement of the fiducial stations with obvious coseismic displacement decreased before the earthquake, and this phenomenon might be one of the earthquake precursors. The data of coseismic displacement and the abnormal speed of movement before the earthquake collected by GPS will be a profound significance for the study of predictive crustal movement, kinetic characteristics of the earthquake and the crust velocity field in Mainland China. 

With the unified processing strategies and the updated geophysical models, we get the present-day crustal movement velocity field with respect to ITRF 2005 and Eurasian plate respectively in mainland China derived from 1999～2011 GPS observations of the Crustal Movement Observation Network of China, which is an important fundamental scientific engineering project in China. The velocity field reveals a good background and basic characteristic of crustal movement in China, which provides important information for research of earthquake prediction, geodynamics and so on. 

By high precision processing for CMONOC GPS data in GanSu province and its adjacent, we get the time series, the characteristic of crustal deformation and coseismic displacement of this earthquake. The results indicate that: only the GSMX of CMONOC fiducial station in this area observed the obvious coseismic displacement（about 18.7mm）, which means that the affected area of this earthquake is about 30～50km from epicenter; the crustal movement in this area is active, regular and consistent. The velocity in the west is faster than in the east, the minimum（about 4.4mm/a）is in the southeast and the maximum（about 18.4mm/a） is in the southwest. The tectonic deformation in this area is mostly squeeze-based. 

Publications

Guoqiang Zhao, Hanrong Sun. Quality Checking and Analysis for Crustal Movement Observation Network of China. Urban Geotechnical Investigation & Surveying, 2009, (3): 73-75.

Jianqiang Wang, Guoqiang Zhao, Binguang Zhu. Contrastive Analysis of Common Computing Methods of Ultra-high Degree and Order Fully Normalized Associated Legendre Function. Journal of Geodesy and Geodynamics, 2009, 29(2): 126-130.

Jianqiang Wang, Jiancheng Li, Guoqiang Zhao, Binguang Zhu. Geoid Undulation Computed Based on Clenshaw Summation. Geomatics and Information Science of Wuhan University, 2010, 35(3): 286-289 .

Jianqiang Wang, Jiancheng Li, Guoqiang Zhao, Jiancheng Han. The Construction and Analysis for Three-tier Point Mass Model of Gravit. Acta Geodaetica et Cartographica Sinica, 2012, 39(5): 503-507.

Guoqiang Zhao, Peng Li. Coseismic and Pre-seismic Displacements Observed by Fiducial Stations in China Caused by the 2011 Japan M9.0 Earthquake. Earthquake, 2012, 32(2): 129-134.

Guoqiang Zhao, Hanrong Sun, Li Ren. Analysis and research of time series for GPS fiducial stations from the crustal movement observation network of China. Recent Developments in World Seismology, 2013, (4): 19-29.

Cai Hua, Zhao Guoqiang. Coseismic displacements and inospheric changes of the 2013 Ms7.0 Lushan earthquake from GPS measurements. Geodesy and Geodynamics, 2013, 4(3): 30-34.

Jianqiang Wang, Jiancheng Li, Taozheng Wang, Guoqiang Zhao. Pole Transform of Spherical Harmonic Function to Quickly Calculate Gravity the Disturbance on Earth-Orbiting Satellites. Geomatics and Information Science of Wuhan University, 2013, 38(9): 1039-1043.

Wang Jian-qiang, Zhao Guo-qiang, Yu Zhi-qi. The Formation of the Local Gravitational Model Based on Point-mass Method. Sensors & Transducers, 2013, 20(Special Issue): 64-68.

Jianqiang Wang, Jiancheng Li, Guoqiang Zhao. Fast Calculation of Earth's Disturbing Gravity through Polynomial Fitting. Journal of Geodesy and Geodynamics, 2013, 33(4): 52-56.

Guoqiang Zhao, Xiaoning Su. Present-day Crustal Movement Velocity Field in Mainland China Derived From GPS Observations. Earthquake, 2014, 34(1): 97-103.

Xiaoning Su, Guojie Meng, Xinkang Hu, Guoqiang Zhao. Precision And Noise Characteristics Of High-Frequency Gps Epoch-By-Epoch Positioning. Journal of Geodesy and Geodynamics, 2014, 34(2): 150-154.

Guoqiang Zhao. Coseismic Displacement of the 2013 Minxian-Zhangxian Ms6.6 Earthquake and Present-day Crustal Deformation in Gansu Province. Earthquake, 2016, 36(1): 126-132.

Guoqiang Zhao, Li Ren. Construction of GPS Data Processing Platform Based on GAMIT/GLOBK. Journal of Geomatics, 2016, 41(1): 37-42

Guoqiang Zhao, Wei Dong. Automatic Downloading Data and Product from IGS. Urban Geotechnical Investigation & Surveying, 2016, (6): 103-106.

Software Development

1. Automatic Downloading Data from IGS and Management Software V1.0. 

2. Standarding the Header File of CMONOC GNSS Data Software V1.0. 

3. Automatic Downloading Data from CMONOC and Management Software V1.0. 

4. Automatic Checking and statistics the Quality of GPS Data Software V1.0. 

5. Rapid Processing and Making Earthquake Emergency Products Software V1.0. 

Research Funding

1. Crustal deformation data from geospatial observations were updated, China's Ministry of Science and Technology, ¥55,000, 2015, principal. 

2. Study on precision processing of crustal deformation data and its methods, Institute of Earthquake Forecasting, ¥200,000, 2010-2011, principal. 

3. Study on coseismic displacement of Mw6.0 and above earthquakes and development of emergency system in mainland China from 2011 to 2015, Institute of Earthquake Forecasting, ¥88,000, 2016-2018, principal. 

4. Development of earthquake emergency products system for crustal deformation in China earthquake science laboratory, Institute of Earthquake Forecasting, ¥100,000, 2019-present, principal. 

5. National data center construction for Crustal Movement Observation Network, China's Ministry of Finance, ¥15,000,000, 2009-2012, participant. 

Expertise

1. Development, running, management, maintaining of GNSS fiducial stations and data system.

2. Linux operating system, programming with c shell.

3. Collecting, quality controlling, archiving, management of GNSS data.

4. High-precision GNSS data processing software GAMIT/GLOBK/QOCA.