Since the observations of the first instrumentally recorded earthquake in the late 1800s, the discovery and documentation of the mysteries of the earth's deep interior and earthquake rupture processes have proceeded hand-in-hand with improvements in instrumentation and data exchange. The pioneering discovers in the first half-century of instrumental seismology were those scientists fortunate enough to have a seismograph at their institute. The excitement of observing a distant earthquake as its energy was recorded was a powerful catalyst for curiosity-driven studies of the deep earth. The results were dramatic. Within about a decade of recording the first seismogram, the gross internal...

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