据《地质通信》(Geological Newsletter)1979年第3期报道,由美国地质调查局地震研究办公室的地震学家和技术人员设计的盒式轻便野外地震记录器很适用于在地震发生前或强余震仍在继续发生的同时收集地震资料。在研制他们自己的仪器设备之前,美国地质调查局派出装有昂贵电子仪器的卡车到野外 According to the Geological Newsletter, Issue 3, 1979, a boxed portable field seismic recorder designed by seismologists and technicians at the Bureau of Seismological Research of the United States Geological Survey is well suited for earthquake prediction before or after a strong aftershock Seismic data are still being collected at the same time. Before developing their own equipment, the US Geological Survey dispatched trucks loaded with expensive electronic equipment to the field