地震研究

根据广东潮州井24年的水化学观测资料,通过对强震以及中等地震前水化学异常研究得到,潮州井水化学资料在中等地震前以中短期异常为主,而强震前水化学测项出现长趋势异常变化。研究还表明,同样的震前异常持续时间,未来地震的震中距越大,其震级也应更大。从异常形态对比可见,震中距越小的地震,其异常变化的幅度和速率也较大。

According to twenty four years hydrochemical monitoring data of Chaozhou well in Guangdong Province,we have found the feature of hydrochemical anomaly precursor before the moderate and strong earthquakes.The results show that hydrochemical precursor for moderate earthquakes is short-term and impending anomaly,but the one for strong earthquakes is long-term anomaly.It's also indicated that the forecasted epicenter is larger and the forecasted magnitude is also larger for the same duration of the anomaly.For the abnormal pattern contract,the forecasted epicenter is smaller than the anomaly range and the velocity of variation is larger.

引言
1 水化学异常实例
2 认识与讨论

图1 距该井250 km以内ML≥4.5地震和<br/>台湾海峡ML≥6.0地震分布图<br/>Fig.1 The distribution map of ML≥4.5 earthquakes

图1 距该井250 km以内ML≥4.5地震和
台湾海峡ML≥6.0地震分布图
Fig.1 The distribution map of ML≥4.5 earthquakes

表1 地震基本参数<br/>Tab.1 Earthquake basic parameters

表1 地震基本参数
Tab.1 Earthquake basic parameters

图2 潮州井观测资料的正常动态图(a)硬度日均值;(b)Ca2+日均值;(c)HCO3-日均值; (d)CO2日均值;(e)电导率日均值;(f)日降雨量<br/>Fig.2 The normal dynamic map of the monitoring data at Chaozhou well

图2 潮州井观测资料的正常动态图(a)硬度日均值;(b)Ca2+日均值;(c)HCO3-日均值; (d)CO2日均值;(e)电导率日均值;(f)日降雨量
Fig.2 The normal dynamic map of the monitoring data at Chaozhou well

图3 台湾海峡6.0级、江西寻乌5.8级地震前潮州井水化学前兆异常<br/>(a)硬度日均值;(b)Ca2+日均值; <br/>(c)HCO3-日均值;(d)CO2日均值<br/>Fig.3 The hydrochemical anomaly precursor before the M6.0 Taiwan channel earthquake and M5.8 Xuwu earthquake in Jiangxi Province

图3 台湾海峡6.0级、江西寻乌5.8级地震前潮州井水化学前兆异常
(a)硬度日均值;(b)Ca2+日均值;
(c)HCO3-日均值;(d)CO2日均值
Fig.3 The hydrochemical anomaly precursor before the M6.0 Taiwan channel earthquake and M5.8 Xuwu earthquake in Jiangxi Province

图4 东沙群岛6.2级、台湾海峡7.4级地震前潮州井水化学前兆异常图<br/>(a)硬度日均值;(b)Ca2+日均值; <br/>(c)HCO3-日均值;(d)CO2日均值<br/>Fig.4 The dydrochemical anomaly precursor map before M6.2 Pratas Islands and M7.4 TaiWan Channel earthquake

图4 东沙群岛6.2级、台湾海峡7.4级地震前潮州井水化学前兆异常图
(a)硬度日均值;(b)Ca2+日均值;
(c)HCO3-日均值;(d)CO2日均值
Fig.4 The dydrochemical anomaly precursor map before M6.2 Pratas Islands and M7.4 TaiWan Channel earthquake

表2 台湾海峡6.0级、江西寻乌5.8级地震前潮州井水化学前兆异常统计<br/>Tab.2 The statistics of the hydrochemical anomaly precursor before the M6.0 Taiwan channel earthquake and M5.8 Xuwu earthquake in Jiangxi Province

表2 台湾海峡6.0级、江西寻乌5.8级地震前潮州井水化学前兆异常统计
Tab.2 The statistics of the hydrochemical anomaly precursor before the M6.0 Taiwan channel earthquake and M5.8 Xuwu earthquake in Jiangxi Province

表3 东沙群岛6.2级、台湾海峡7.4级地震前潮州井水化学前兆异常统计<br/>Tab.3 The statistics of the hydrochemical anomaly precursor before M6.2 Pratas Islands and M7.4 TaiWan Channel earthquake

表3 东沙群岛6.2级、台湾海峡7.4级地震前潮州井水化学前兆异常统计
Tab.3 The statistics of the hydrochemical anomaly precursor before M6.2 Pratas Islands and M7.4 TaiWan Channel earthquake

表4 福建永春4.9级、厦门4.8级地震前潮州井水化学前兆异常统计<br/>Tab.4 The statistics of the hydrochemical anomaly precursor before M4.9 YongChun earthquake and M4.8 Xiamen earthquake in Fujian Province

表4 福建永春4.9级、厦门4.8级地震前潮州井水化学前兆异常统计
Tab.4 The statistics of the hydrochemical anomaly precursor before M4.9 YongChun earthquake and M4.8 Xiamen earthquake in Fujian Province

表5 其余各震例震前潮州井水化学前兆异常统计<br/>Tab.5 The statistics of the hydrochemical anomaly precursor before other earthquakes

表5 其余各震例震前潮州井水化学前兆异常统计
Tab.5 The statistics of the hydrochemical anomaly precursor before other earthquakes

图5 福建永春4.9级、厦门4.8级地震前井水化学前兆异常<br/>(a)硬度日均值;(b)Ca2+日均值; <br/>(c)HCO3-日均值;(d)CO2日均值<br/>Fig.5 The hydrochemical anomaly precursor before the M4.9 YongChun earthquake and M4.8 Xiamen earthquake in Fujian Province

图5 福建永春4.9级、厦门4.8级地震前井水化学前兆异常
(a)硬度日均值;(b)Ca2+日均值;
(c)HCO3-日均值;(d)CO2日均值
Fig.5 The hydrochemical anomaly precursor before the M4.9 YongChun earthquake and M4.8 Xiamen earthquake in Fujian Province

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备注

引言

1 水化学异常实例

2 认识与讨论

期刊信息