AREAS OF THE ISOSEISMALS.
255
| Area in Geographical Square Miles | |
|---|---|
1. Meizoseismal[1] (orange) area; that of general total destruction of edifices and great loss of life |
716 |
2. First isoseismal (red) area; that of great prostration of edifices and loss of life |
1,685 |
3. Second isoseismal (blue) area; that of partial prostration and of universal fissuring of edifices, with partial or with no loss of life. |
4,976 |
4. Third isoseismal (yellow); area, within which the shock was distinctly perceived by the unassisted senses, and produced more or less alarm; and more or less fissuring and damage, towards the parts nearest the preceding isoseismal line |
29,500 |
5. Fourth isoseismal (lilac); the area of which is unknown, and only partially marked, to the north- |
- ↑ These colours refer to the original maps in the possession of the Royal Society. Upon these, the totally destroyed towns are marked red; those partially overthrown are marked blue; those wherein the shock was distinctly felt yellow; those external to the third isoseismal are not coloured; and those affected only by the reflected and refracted wave system are coloured green. Economy in colour printing compelled the changes described in the reproduction of the maps. The original nomenclature is here stated, as the author suggests to seismologists, the desirableness of consulting the originals; the small scale of the published maps giving less palpably and clearly, the physical relations of the country, to the earthquake phenomena.
