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| 1 | Comparison of Absolute Gravity Measurements Obtained with FG5/232 and FG5/214 Instruments显示文摘This paper introduces the comparison of absolute gravity measurements in China during 2006-2008,and analyzing the survey and comparing the results,it shows that there is no obvious system error between the gravimeter of FG5/214 and FG5/232,the surveying accuracy is very high and repetition is good,and their inner surveying accuracy is about 2-3 microGal. | XING Lelin LI Hui LI Jiancheng HE Zhitang | 2009 | Geo-Spatial Information Science2009，12，4： | 23 |
| 2 | Far-field coseismic gravity changes related to the 2015 MW7.8 Nepal(Gorkha)earthquake observed by superconducting gravimeters in Chinese mainland显示文摘Using data from five SGs at four stations in Chinese mainland,obvious permanent gravity changes caused by the 2015 MW7.8 Nepal(Gorkha)earthquake were detected.We analyzed the gravity effects from ground vertical deformation(VD)using co-site continuous GPS(cGPS)data collocated at the Lijiang and the Wuhan station,and hydrological effects using GLDAS models and groundwater level records.After removing these effects,SG observations before and after the earthquake revealed obvious permanent gravity changes:−3.0μGal,7.3μGal and 8.0μGal at Lhasa,Lijiang and Wuhan station,respectively.We found that the gravity changes cannot be explained by the results of dislocation theory. | LeLin Xing ZiWei Liu JianGang Jia ShuQing Wu ZhengSong Chen XiaoWei Niu | 2021 | Earth and Planetary Physics2021，5，2： | 4 |
| 3 | Long-term gravity changes in Chinese mainland from GRACE and ground-based gravity measurements显示文摘A long-term (9 years) gravity change in Chinese mainland is obtained on the basis of observations of the ground-based national gravity network. The result shows several features that may be related to some large-scale groundwater pumping in North China, glacier-water flow and storage in Tianshan region, and pre-seismic gravity changes of the 2008 Ms8.0 Wenchuan earthquake, which are spatially similar to co-seismic changes but reversed in sign. These features are also shown in the result of the satellite-based GRACE observation, after a height effect is corrected with GPS data. | Xing Lelin Li Hui Xuan Songbai Kang Kaixuan Liu Xiaoling | 2011 | Geodesy and Geodynamics2011，2，3： | 3 |
| 4 | Seasonal gravity changes estimated from GRACE data显示文摘Since 2002,the GRACE program has provided a large amount of high-precision data,which can be used to detect temporal gravity variations related to global mass re-distribution inside the fluid envelop of the surface of the Earth.In order to make use of the GRACE data to investigate earthquake-related gravity changes in China,we first studied the degree variances of the monthly GRACE gravity field models,and then applied decorrelation and Gaussian smoothing method to obtain seasonal gravity changes in China.By deducting the multi-year mean seasonal variations from the seasonal maps,we found some earthquake-related gravity anomalies. | Zhengbo Zou Hui Li Zhicai Luo Lelin Xing | 2010 | Geodesy and Geodynamics2010，1，1： | 3 |
| 5 | Gravity variation in the Tibet area before the Nepal Ms8.1 earthquake显示文摘This research utilized two periods of gravity monitoring results from 2010 to 2013 from the Continental Tectonics Environmental Monitoring Network of China,analyzed the correlation between gravity variation in the Tibet area and the Nepal Ms8.1 earthquake,and investigated the gravity variation mechanism in combination with the crust vertical movement and horizontal strain field observed by Global Positioning System(GPS).The research results indicated that(1) the gravity variation exhibited apparent characteristics of a positive anomaly and high gradient zone in the Himalayan frontier.This observation is consistent with the existing recognition of the gravity anomaly and occurrence regularity of a strong earthquake;(2) the gravity variation exhibited apparent consistence with the spacious distribution of the vertical movement and the horizontal deformation field in that area.The crustal vertical movement was not the direct cause leading to the gravity variation.It is assumed that the crust stressestrain accumulation in the Qinghaie Tibetan Plateau and its adjacent areas is the important factor that resulted in the variation of gravity. | Hongtao Hao Lelin Xing Ziwei Liu YUfei Han Hui Li | 2016 | Geodesy and Geodynamics2016，7，6： | 3 |
| 6 | Three-dimensional admittance analysis of lithospheric elastic thickness over the Louisville Ridge显示文摘Using bathymetry and altimetric gravity anomalies, a 1° 9 1° lithospheric effective elastic thickness(Te) model over the Louisville Ridge and its adjacent regions is calculated using the moving window admittance technique. For comparison, three bathymetry models are used: general bathymetric charts of the oceans, SIO V15.1,and BAT_VGG. The results show that BAT_VGG is more suitable for calculating T e than the other two models. T e along the Louisville Ridge was re-evaluated. The southeast of the ridge has a medium Te of 10–20 km, while Te increases dramatically seaward of the Tonga-Kermadec trench as a result of the collision of the Pacific and IndoAustralian plates. | Minzhang Hu Hui Li Chongyang Shen Lelin Xing Hongtao Hao | 2016 | Earthquake Science2016，29，2： | 1 |
| 7 | Gravity inversion of deep-crust and mantle interfaces in the Three Gorges area显示文摘To better understand the heterogeneity of deep-crust and mantle interfaces in the region of the Three Gorges, China, we used the Parker-Oldenburg iterative inversion method to invert existing Bouguer gravity data from the Three Gorges area (1 ∶500000), a new gravity map of the Three Gorges Dam (1 ∶200000), and the results of deep seismic soundings. The inversion results show a Moho depth of 42 km between Badong and Zigui and the depth of the B2 lower-crustal interface beneath the Jianghan Plain and surrounding areas at 21-25 km. The morphology of crustal interfaces and the surface geology present an overpass structure. The mid-crust beneath the Three Gorges Dam is approximately 9 km thick, which is the thinnest in the Three Gorges area and may be related to the shallow low-density body near the Huangling anticline. The upper crust is seismogenic, and there is a close relationship between seismicity and the deep-crust and mantle interfaces. For example, the M5.1 Zigui earthquake occurred where the gradients of the Moho and the B2 interface are the steepest, showing that deep structure has a very important effect on regional seismicity. | Wang Jian Shen Chongyang Li Hui Sun Shaoan Xing Lelin | 2012 | Geodesy and Geodynamics2012，3，4： | 1 |
| 8 | Temporal variation of gravity-field in North China before and after the 2011 Japan Mw9. 0 earthquake显示文摘By using absolute and relative-gravity data recorded by the gravity network in North China,we obtained some large-scale and high-spatial-resolution images of gravity variation in this area for the first time. By analyzing these images,we found that the gravity in Liaodong peninsula area showed an obvious increase of 80 × 10 -8ms -2 during about one-and-half year before the 2011 Japan Mw9. 0 earthquake,and a rapid decrease after the earthquake. This gravity variation is similar to that observed previously for the 1976 Tangshan M7. 8 earthquake. | Hao Hongtao Liu Ziwei Li Hui Xing Lelin Wu Yunlong Kang Kaixuan | 2011 | Geodesy and Geodynamics2011，2，4： | 1 |
| 9 | Gravity change observed in a local gravity network and its implication to seasonal precipitation in Dali county, Yunnan province, China显示文摘This study investigates data-processing methods and examines the precipitation effect on gravity measurements at the Dali gravity network, established in 2005. High-quality gravity data were collected during four measurement campaigns. To use the gravity data validly, some geophysical corrections must be considered carefully. We first discuss data-processing methods using weighted leastsquares adjustment with the constraint of the absolute gravity datum. Results indicate that the gravity precision can be improved if all absolute gravity data are used as constraints and if calibration functions of relative gravimeters are modeled within the observation function. Using this data-processing scheme, the mean point gravity precision is better than 12 lgal. After determining the best data-processing scheme, we then process the gravity data obtained in the four measurement campaigns, and obtain gravity changes in three time periods. Results show that the gravity has a remarkable change of more than 50 lgal in the first time period from Apr–May of 2005 to Aug–Sept of 2007. To interpret the large gravity change, a mean water mass change(0.6 m in height) is assumed in the ETOPO1 topographic model. Calculations of the precipitation effect on gravity show that it can reach the same order of the observed gravity change. It is regarded as a main source of the remarkable gravity change in the Dali gravity network, suggesting that the precipitation effect on gravity measurements must be considered carefully. | Xin Zhou Wenke Sun Hui Li Shuhei Okubo Shaoan Sun Lelin Xing Dongzhi Liu Chongyang Shen | 2014 | Earthquake Science2014，27，1： | 0 |
| 10 | Gravity variation before the Akto Ms6.7 earthquake, Xinjiang显示文摘The relationship between gravity variation and the Akto Ms6.7 earthquake on November 11, 2016, was studied by use of mobile gravity observation data from the China continental structural environmental monitoring network. The result revealed that before the Akto earthquake, a high positive gravity variation was observed in the Pamir tectonic knots region(within a maximum magnitude of approximately+80 microgal), which was consistent with the existing knowledge of gravity abnormality and the locations of strong earthquakes. In view of the recent strong seismic activities in the Pamir tectonic knots region, as well as the strong upward crust movement and compressive strain, it is believed that gravity change in the Pamir tectonic knots region reflects the recent strong seismic activities and crust movement. | Hongtao Hao Lelin Xing Minzhang Hu Yufei Han Hui Li | 2017 | Geodesy and Geodynamics2017，8，2： | 0 |
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