| 浅层地温强震前的异常变化 |
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| 引用本文： | 曹新来,张子广.浅层地温强震前的异常变化[J].华北地震科学,1995,13(4):9-17. |
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| 作者姓名： | 曹新来 张子广 |
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| 作者单位： | 河北省地震局 |
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| 摘 要： | 浅层地温指地表至地下３．２ｍ深处的地温。通过数十年浅层地温变化与强地震活动关系的研究，指出了强地震发生前一段时间０．８ｍ地温与地表温度的相关系数为历年同期最低值；０．８ｍ、１．６ｍ和３．２ｍ地温连续６个月以上为正距平，且平均距平值分别大于０．８、０．７和０．５即认为地温有升温异常；在此时段内地温有历年同期最大值或次大值；做半年尺度或以月为简单的０．８ｍ地温、地表温度平均距平等值线图，等值线的分布圈
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| 关 键 词： | 地下水 地温异常 相关地震 唐山地震 地震前兆 |
ANOMALOUS VARIATIONS OF SHALLOW LAYER GEOTEMPERATURE BEFORE STRONG EARTHQUAKES |
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| Cao Xinlai, Zhang Ziguang,Wang Qincai.ANOMALOUS VARIATIONS OF SHALLOW LAYER GEOTEMPERATURE BEFORE STRONG EARTHQUAKES[J].North China Earthquake Sciences,1995,13(4):9-17. |
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| Authors: | Cao Xinlai Zhang Ziguang Wang Qincai |
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| Abstract: | The shallow layer geotemperature refers to geotemperature from ground surface to the depth of 3. 2m. Through studies of the relationship between the shallow layer geotemperature variations in the past veral decades of years and strong earthquake activity, it has been pointed out that the correlation coefficient of geotemperature at depth of 0. sin and the ground surface temperature in a certain time interval before occurrence of strong earthquakes is the lowest value in the same period over the years; the geotemperatures at depth of 0. sin, 1. 6m and 3. Zm consecutively lasting more than six months are regarded as positive distance averages, and if the mean distance averages are larger than 0. 8, 0. 7and 0. 5 respectively, it is considered that the geotemperatures show temperature-rising anomalies ; in this time interval, geotemperature shows largest or second largest value in the same period over the years;plotting half year or monthly isoline nap of mean distance averages of geotemperature at depth of 0. sinand ground surface temperature, with isoline encircling the relative temperature-rising center, the temperature-rising area or its vicinity could be considered as the epicentral area of coming strong earthquakes. A detailed analysis of geotemperature anomalous variations associated with the Xingtai earthquake occurred in March of 1966, Tangshan earthquake in July of 1976, Datong earthquake in October of 1989 has been made, the mechanism of anomalous temperature rising has been studied, and meanwhile the effect of rainfall on shallow layer geotemperature has also been analyzed. |
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| Keywords: | shallow groundwater geotemperature anomaly correlation earthquake Xingtai earthquake Tangshan earthquake |
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