月震特征及与地震的对比

月球内部结构是月球研究的热点问题，月震是研究月球内部结构的最佳手段之一.对月震数据及震源参数进行了再分析，在分析已有研究结果的基础上，对各类月震的信号特征、震源分布以及震源机制进行讨论，并将其与地震进行对比.研究发现，月震与地震有很多明显差异:月震信号持续时间较长，且深源月震与热月震具有波形匹配特征；探测到的月震多为深源月震，主要分布于月球正面的北东向和南西向；深源月震和热月震的发震时间都具有周期性，深源月震的周期性主要由地球对月球的潮汐引力以及太阳对月球轨道的扰动造成，且其发震位置具有丛集性，即在相同或相近位置重复发生，而热月震的周期性主要由于月球昼夜温度变化造成. 

Characteristics of Moonquake and Its Comparison with Earthquake

The study on lunar internal structure is the hot issue.Seismology is one of the best methods for studying lunar internal structure.In this paper,the moonquake data and parameters are reanalyzed,and the characteristics of moonquake signal,distribution and mechanism are discussed in detail and compared with earthquake.By combining with previous studies,it is concluded that the moonquake is quite different from earthquake.Moonquake signals are typically of very long duration.Deep moonquakes and thermal moonquakes show evident wave form matching feature.Most of moonquakes detected are deep moonquakes which mainly distribute on the nearside of the Moon.The largest number of deep moonquakes which emanate from source nest are caused by tidal.Thermal moonquake also occurs periodically,resulting from temperature variation during one lunation.