| 宁波台动水位与垂直摆对印尼8.9和日本9.0级地震的同震响应 |
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| 引用本文： | 邱永平.宁波台动水位与垂直摆对印尼8.9和日本9.0级地震的同震响应[J].国际地震动态,2011(4):28-33. |
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| 作者姓名： | 邱永平 |
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| 作者单位： | 浙江省宁波地震台,浙江宁波,315029 |
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| 摘 要： | 分析认为宁波台ZK03井动水位与VS垂直摆倾斜仪出现的异常可能是印尼8.9和日本9.0级地震的同震响应.印尼8.9级地震后,动水位表现为地震波引起的脉冲和阶跃变化并抬高水位.垂直摆表现为形变波引起的脉冲和阶跃变化,EW向最大幅度约为408.328×10-3"的脉冲式向E振荡波,并向W出现阶跃变化;NS向最大幅度约为29...
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| 关 键 词： | 印尼8.9和日本9.0级地震 动水位 垂直摆 同震响应 |
The co-seismic responses of dynamic water level and vertical pendulum at Ningbo seismic station for the Sumatra M8.9 and Japan M9.0 earthquakes |
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| Qiu Yongping.The co-seismic responses of dynamic water level and vertical pendulum at Ningbo seismic station for the Sumatra M8.9 and Japan M9.0 earthquakes[J].Recent Developments in World Seismology,2011(4):28-33. |
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| Authors: | Qiu Yongping |
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| Institution: | Qiu Yongping (The Seismic Station of Ningbo, Zhejiang Province, Ningbo 315029, China) |
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| Abstract: | Based on analyses of the anomalies in dynamic water level and vertical pendu lum tiltmeter at the well no. ZK03 of Ningbo station, the anomalies were known as co--seis- mic responses of the Sumatra 1V/8.9 earthquake and the Japan ./V/9.0 earthquake. For the Su matra M8.9 earthquake, the dynamic water level showed co-seismic pulse and step change to high level; the vertical pendulum showed pulse and step change caused by crustal deformation wave, the amplitude of pulse was about 408.328×10 3,, from west to east in WE direction and the step change was from east to west; the amplitude in NS direction was about 295. 192×10-3＂ from south to north and the step change was from south to north. After the Japan M9.0 earthquake, the dynamic water level showed pulse and step change caused by seismic wave, and recovered to the level before the earthquake after 10 hours; The vertical pendulum showed repeating pulses and the amplitude in WE direction was about 304. 163 × 10 -3, from west to east; and the amplitude in NS direction was about 372. 252× 10-3＂ from south to north, from the above analyses it concludes that the amplitudes of this station in the two directions were obviously different, they showed a direction sense, i.e. , the amplitude perpendicular to the earthquake focus was greater than that parallel to the earthquake focus. The normal tidal changes and the anomalous changes for dynamic water level and vertical pendulum were similar. |
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| Keywords: | the Sumatra M8 9 earthquake the Japan M9 0 earthquake dynamic waterlevel vertical pendulum co-seismic response |
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