在阿波罗计划中，宇航员在月在在月球表面上留下了四个地震仪。于1977年，这些仪器把最后的数据送回到地球，五年后，阿波罗计划就结束了。
During the Apollo program, astronauts left four seismographs on the lunar surface. The instuments returned their last data to Earth in 1977, five years after the Apollo program ended.
阿波罗被动地震实验包括1969年到1972年间部署的4台地震仪，其中记载了一直到1977年底月球地震活动情况。
The Apollo Passive SeismicExperiment consisted of four seismometers deployed between 1969 and1972, which recorded continuous lunar seismic activity until late 1977.
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