| 几个中强地震前昆明重力场变化特征 |
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| 引用本文： | 刘仲全,沈荣臣.几个中强地震前昆明重力场变化特征[J].地震研究,1988(1). |
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| 作者姓名： | 刘仲全 沈荣臣 |
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| 作者单位： | 云南省地震局 昆明
(刘仲全)，云南省地震局 昆明(沈荣臣) |
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| 摘 要： | 本文利用昆明台重力固体潮观测资料,对云南省内几个中强地震前昆明重力场的变化特征进行了分析研究。研究表明,震前昆明重力场的变化有以下特征:1.震前重力场均有不同程度的反映和表现。2.重力场的各种异常均以减小为主。3,一般来说,重力场的异常随地震的强度加大、频度增高而变大。4.重力场的异常具有复杂性、多样性。文中对重力场的变化进行了初步的分析讨论。并对加强重力工作,做好分析预报提出了看法和认识。
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| 关 键 词： | 重力固体潮 中强地震 昆明台 |
CHARACTERISTICS OF GRAVITATIONAL FIELD VARIATIONS IN KUNMING AREA PRIOR TO SEVERAL MODERATELY-STRONG EVENTS |
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| Liu Zhongquan,Shen Rongchen.CHARACTERISTICS OF GRAVITATIONAL FIELD VARIATIONS IN KUNMING AREA PRIOR TO SEVERAL MODERATELY-STRONG EVENTS[J].Journal of Seismological Research,1988(1). |
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| Authors: | Liu Zhongquan Shen Rongchen |
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| Abstract: | Using observational data of gravitational earth tides registered at Kunming Station, this paper analyses and studies the characteristics of gravitational field variations in Kunming area prior to several moderately-strong events occurred in Yunnan Province. The study throws light on the following features.1. Pre-shock gravitational fields show with on exceptions certain responses.2. Various anomalies of the gravitational field in most cases present reduced values.3. Generally, the anomalies of gravitational field yield greater values along with the intensifying of the strength and frequency of earthquakes.4. Anomalies of gravitational field present complicated and multi-type features.The paper makes preliminary analysis and discussions on the gravitational field variations. Suggestions are also given for the improvement of the gravitational observations and tor making better earthquake predictions. |
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| Keywords: | Gravitational earth tides Moderately-strong events Kunming Seismological Station |
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