Abstract
THREE important memoirs have recently been published by Dr. F. Omori, Professor of Seismology at the Imperial University of Tokio.1 In the first he describes a form of horizontal pendulum adapted for mechanical registration, a method which, like the Italian seismologists, he prefers on account of its cheapness and the more open diagrams which it provides. The pendulum consists of a thin brass cylinder, filled with lead, and weighing about 14 kg. This is attached to a horizontal tubular strut of iron, which ends in a sharp conical steel point, working in a conical steel socket fixed to the wall of an earthquake-proof house.
Article PDF
References
"Horizontal pendulums for registering mechanically earthquakes and other earth movements": Journ. Coll. Sci., Imp. Univ., Tokio, vol. xi. 1899, pp. 121–145;
"Note on the preliminary tremor of earthquake motion": ibid., pp. 147–159;
"Earthquake measurement at Miyako": ibid., pp. 161–195.
Rights and permissions
About this article
Cite this article
Prof. F. Omori on Earthquake-Motion. Nature 60, 431 (1899). https://doi.org/10.1038/060431a0
Issue Date:
DOI: https://doi.org/10.1038/060431a0