Case 17: Research on the Vertical Movements of the Crust Associated With Earthquake Swarms in Japan
- Max Wyss
Published Online: 3 APR 2013
Copyright 1991 American Geophysical Union.
Evaluation of Proposed Earthquake Precursors
How to Cite
Sato, H. (1991) Case 17: Research on the Vertical Movements of the Crust Associated With Earthquake Swarms in Japan, in Evaluation of Proposed Earthquake Precursors (ed M. Wyss), American Geophysical Union, Washington, D. C.. doi: 10.1029/SP032p0086
- Published Online: 3 APR 2013
- Published Print: 1 JAN 1991
Print ISBN: 9780875907840
Online ISBN: 9781118667873
- Earthquake prediction—Evaluation
It has been observed in Japan that most earthquake swarms, except very small ones, are accompanied by crustal uplifts. Therefore, research on the relationship between crustal uplifts and earthquake swarms is important for a better understanding of the mechanism of earthquake swarms. Recent seismic events which occurred in the Izu Peninsula, offered the opportunity for a study of the relationship. From the analysis of tidal records and the leveling data, the following relationships were obtained:
1. Uplifts of the crust precede, by several months, earthquake swarms.
2. Earthquake swarms cease at nearly the same time as the crustal uplifts. From the data of relevelings carried out after the occurrences of earthquake swarms since 1900, a quantitative relation between crustal uplifts and earthquake swarms has been obtained.