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" The preliminary tremor, which consists of vibrations of small amplitude and of comparatively short period, is divided into the earlier portion or the first preliminary tremor, and the later portion or the second preliminary tremor. Commencement of the... "
Publications of the Astronomical Society of the Pacific - Page 195
by Astronomical Society of the Pacific - 1906
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Publications of the Earthquake Investigation Committee in ..., Issues 11-15

Shinsai Yobō Chōsakai (Japan) - 1902 - 660 pages
...of vibrations * The term period is used in the sense of the complete period. of small amplitude aud of comparatively short period, is divided into the...preliminary tremor. Commencement of the latter is marked by an increase of the amplitude und, in many cases, ¡ilso by the appearance of slow undulations....
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Publications of the Astronomical Society of the Pacific, Volumes 17-18

Astronomical Society of the Pacific - 1905 - 606 pages
...phase of the principal itortion ................................................. '. ................ DE— 2nd phase of the principal portion. J— End...the earlier portion or the first preliminary tremor, anr1 the later portion or the second prelimiiiary tremor. Comineiu'eiiient of the latter is marked...
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After Earthquake and Fire: A Reprint of the Articles and Editorial Comment ...

Mining and scientific press, San Francisco - 1906 - 284 pages
...d e. Second phase of the principal portion, e f. Third phase of the principal portion, f g. Fourth phase of the principal portion, j. End portion. The...which consists of vibrations of small amplitude and of short period, is divided into the earlier portion or the first preliminary tremor, and the later portion...
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After Earthquake and Fire: A Reprint of the Articles and Editorial Comment ...

1906 - 214 pages
...portion, e f. Third phase of the prineipal portion. f g. Fourth phase of the prineipal portion. ]. End portion. The successive phases of the earthquake...which consists of vibrations of small amplitude and of short period, is divided into the earlier portion or the first preliminary tremor, and the later portion...
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Publications of the Earthquake Investigation Committee in ..., Issues 23-24

Shinsai Yobō Chōsakai (Japan) - 1907 - 398 pages
...motion, illustrated in Fig. 4, are as follows. The preliminary tremor (abc), which consists principally of vibrations of small amplitude and of comparatively short period, is divided into the 1st section or the first preliminary tremor (ab), and the 2nd section or the second preliminary trmor...
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Publications of the Earthquake Investigation Committee in ..., Issues 13-16

Shinsai Yobō Chōsakai (Japan) - 1903 - 576 pages
...which consists principally of vibrations * The term period is used in the sense of the complete period. of small amplitude and of comparatively short period, is divided into the earlier portion or the Ji-rst preliminary tremor, and the later portion or the second preliminary tremor. Commencement of...
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