Comparison of velocities of wave-transit which have been actually observed, with velocities which ought to exist from what we know of the depth of the Pacific by actual soundings.—From a chart given in ‘Petermann’s Geograph. Mittheilungen,’ Band xxiii. p. 164, 1877, it is possible to draw approximate sections on lines in various directions across the bed of the Pacific.
From the origin of the shock to Japan (Kameishi) the line would be as follows:—
| about 7,441 | miles | 15,000 | feet deep |
| 1,100 | „ | 18,000 | „ |
| 160 | „ | 27,000 | „ |
| 80 | „ | 12,000 | „ |
| 60 | „ | 6,000 | „ |
On account of the Tuscarora and Belkap Deeps this would be the most irregular line over which the wave had to travel.
From the origin to New Zealand (Wellington) the line would be
| about 5,274 | miles | 15,000 | feet deep |
| „ 300 | „ | 12,000 | „ |
From the origin to Samoa the line would be
| about 5,773 | miles | 15,000 | feet deep |
From the origin to the Sandwich Islands (Honolulu) the line would be
| almost 5,634 | miles | 15,000 | feet deep |
| and 60 | „ | 12,000 | „ |