一、日本第一个海底地震观测系统 日本地震观测是由日本气象厅和几个大学负责的,观测点密度很高,在世界上也是首屈一指,但这些观测设施都设在陆地上。对于日本来说,大多数地震发生在太平洋一侧的海底,尤其巨大地震多发生在海底。因此,仅依靠地面台观测地震,显然有很大局限性,进行海底地震的直接观测势在必行,而且是非常重要的。日本气象厅经过长期努力研制出海底地震仪,并首先于 I. Japan’s First Seabed Earthquake Observation System Japan Earthquake Observation is conducted by the Japan Meteorological Agency and several universities. The observation points are very dense and are second to none in the world. However, these observation facilities are all located on land. For Japan, most of the earthquakes occurred on the Pacific Ocean side of the sea, in particular, a huge earthquake occurred on the sea floor. Therefore, it is obviously very limited to rely on the ground station to observe the earthquake. It is imperative to carry out the direct observation of the seabed earthquake and it is very important. Japan Meteorological Agency after long-term efforts to develop a seabed seismograph, and first of all