In the paper, seismic strain field is considered as a variable of seismic activity. The strain field is calculated before the earthquake above Ms7 in mainland China since 1980, and the abnormal change of time factor is extracted before the earthquake, by means of the natural orthogonal function expansion method. The results show that the time factor before the large earthquake will change suddenly, jump or jump down on stationary background. At least 3 typical fields will appear abnormal changes in the first 4 ones of seismic strain field before the earthquake, having the characteristics of multi-component display anomalies. The earliest time of abnormal occurrence is about 3 years before the earthquake. Moreover, there are some short-term time factor anomalies before some earthquakes. Through case studies the results of case studies show that the time factor anomaly extracted by strain field is more unique than seismic energy field in analyzing the anomaly of seismic activity. The difference between strain field and energy field is also discussed.
| Published in | Earth Sciences (Volume 8, Issue 1) |
| DOI | 10.11648/j.earth.20190801.12 |
| Page(s) | 10-19 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2019. Published by Science Publishing Group |
Chinese Mainland, Seismic Strain Field, Seismic Energy Field, Natural Orthogonal Function Expansion Method, Time Factor
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APA Style
Guofu Luo, Zhongwang Liu, Fenghe Ding, Heqing Ma, Mingzhi Yang. (2019). Research on the Seismic Strain Field Before Earthquake Above Ms7, CHINESE Mainland. Earth Sciences, 8(1), 10-19. https://doi.org/10.11648/j.earth.20190801.12
ACS Style
Guofu Luo; Zhongwang Liu; Fenghe Ding; Heqing Ma; Mingzhi Yang. Research on the Seismic Strain Field Before Earthquake Above Ms7, CHINESE Mainland. Earth Sci. 2019, 8(1), 10-19. doi: 10.11648/j.earth.20190801.12
AMA Style
Guofu Luo, Zhongwang Liu, Fenghe Ding, Heqing Ma, Mingzhi Yang. Research on the Seismic Strain Field Before Earthquake Above Ms7, CHINESE Mainland. Earth Sci. 2019;8(1):10-19. doi: 10.11648/j.earth.20190801.12
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Download@article{10.11648/j.earth.20190801.12,
author = {Guofu Luo and Zhongwang Liu and Fenghe Ding and Heqing Ma and Mingzhi Yang},
title = {Research on the Seismic Strain Field Before Earthquake Above Ms7, CHINESE Mainland},
journal = {Earth Sciences},
volume = {8},
number = {1},
pages = {10-19},
doi = {10.11648/j.earth.20190801.12},
url = {https://doi.org/10.11648/j.earth.20190801.12},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.earth.20190801.12},
abstract = {In the paper, seismic strain field is considered as a variable of seismic activity. The strain field is calculated before the earthquake above Ms7 in mainland China since 1980, and the abnormal change of time factor is extracted before the earthquake, by means of the natural orthogonal function expansion method. The results show that the time factor before the large earthquake will change suddenly, jump or jump down on stationary background. At least 3 typical fields will appear abnormal changes in the first 4 ones of seismic strain field before the earthquake, having the characteristics of multi-component display anomalies. The earliest time of abnormal occurrence is about 3 years before the earthquake. Moreover, there are some short-term time factor anomalies before some earthquakes. Through case studies the results of case studies show that the time factor anomaly extracted by strain field is more unique than seismic energy field in analyzing the anomaly of seismic activity. The difference between strain field and energy field is also discussed.},
year = {2019}
}
TY - JOUR T1 - Research on the Seismic Strain Field Before Earthquake Above Ms7, CHINESE Mainland AU - Guofu Luo AU - Zhongwang Liu AU - Fenghe Ding AU - Heqing Ma AU - Mingzhi Yang Y1 - 2019/01/30 PY - 2019 N1 - https://doi.org/10.11648/j.earth.20190801.12 DO - 10.11648/j.earth.20190801.12 T2 - Earth Sciences JF - Earth Sciences JO - Earth Sciences SP - 10 EP - 19 PB - Science Publishing Group SN - 2328-5982 UR - https://doi.org/10.11648/j.earth.20190801.12 AB - In the paper, seismic strain field is considered as a variable of seismic activity. The strain field is calculated before the earthquake above Ms7 in mainland China since 1980, and the abnormal change of time factor is extracted before the earthquake, by means of the natural orthogonal function expansion method. The results show that the time factor before the large earthquake will change suddenly, jump or jump down on stationary background. At least 3 typical fields will appear abnormal changes in the first 4 ones of seismic strain field before the earthquake, having the characteristics of multi-component display anomalies. The earliest time of abnormal occurrence is about 3 years before the earthquake. Moreover, there are some short-term time factor anomalies before some earthquakes. Through case studies the results of case studies show that the time factor anomaly extracted by strain field is more unique than seismic energy field in analyzing the anomaly of seismic activity. The difference between strain field and energy field is also discussed. VL - 8 IS - 1 ER -
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