地震观测 meaning in English

seismic measurement
seismographic observation

Quakewatchers in california are uneasy .
加利福尼亚的地震观测者焦虑不安。
For every seasonal seismic observer one unforgettable memory is that of his first desert sandstorm .
对每个熟练的地震观测员来说，初遇沙风暴的情景是难以忘怀的。
Format conversion of earthquake observation data by visual basic
语言实现地震观测资料格式转换
Azimuthal seismic observation
方位地震观测
Areal seismic survey
区域地震观测

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