[1]HUANG Jiangpei,WANG Qinghua,XU Shengxin,et al.Study on the Change of Primary Term Coefficient of CG-5 Gravimeter and Its Effect on Earthquake Monitoring Data[J].Journal of Seismological Research,2020,43(01):101-108.
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Study on the Change of Primary Term Coefficient of CG-5 Gravimeter and Its Effect on Earthquake Monitoring Data
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
43
Number of periods:
2020 01
Page number:
101-108
Column:
Public date:
2020-01-30
- Title:
- Study on the Change of Primary Term Coefficient of CG-5 Gravimeter and Its Effect on Earthquake Monitoring Data
- CLC:
- P315.62
- DOI:
- -
- Abstract:
- Based on the relative gravity observation data from 2015 to 2018 in Yunnan,we studied the relationship between segment difference and mutual difference of two CG-5 gravimeters belong to the Yunnan earthquake administration,and calculated the primary term coefficient differences between two gravimeters by linear regression method in three years.Then,we analyzed the differences of primary term coefficient in different time periods and different measurement periods in an observation period.The results show that the first?order's coefficients of the two gravimeters have changed in three years,and have different change laws.The max-difference has reached 0.000 2,while the primary term coefficient has not changed significantly with time or with the measured interval in a period of observation.We calculated the primary term coefficient of each observation period in three years,and proved the results are reasonable and applicable,combined with the data of absolute gravity.We analyzed the correlation between gravity change and 2018 earthquake by comparing the trend maps of three years before and after primary term coefficient corrected.It is concluded that the maximum effect on gravity observation data can reach 100×10-8 m·s-2 before and after primary term coefficient correction.The corrected data are in good agreement with the absolute gravity observations and the correlation with earthquakes is also more obvious.
- References:
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Last Update:
2020-01-30