Studies of Matsushiro earthquakes: 1. Variations of parameter m in the Ishimoto-Iida relation
Article first published online: 3 JUN 2011
©1969. American Geophysical Union. All Rights Reserved.
Eos, Transactions American Geophysical Union
Volume 50, Issue 5, pages 391–393, May 1969
How to Cite
1969), Studies of Matsushiro earthquakes: 1. Variations of parameter m in the Ishimoto-Iida relation, Eos Trans. AGU, 50(5), 391–393, doi:10.1029/EO050i005p00391-03., and (
- Issue published online: 3 JUN 2011
- Article first published online: 3 JUN 2011
In general, the Ishimoto-Iida relation between the maximum trace amplitude a and the number of earthquakes n(a)
n(a) = k a−m
holds good for earthquakes observed at an observation where k and m are constant [Ishimoto and Iida, 1939].
On the other hand, Suzuki [1953, 1955] says that the parameter m in this relation is connected with b in the Gutenberg-Richter relation log N = a−bM where a and b are constant [Gutenberg and Richter, 1942, 1956]. Suzuki derived a relation of b = m − 1 from the theoretical basis, under an assumption that the decay factor of seismic waves was constant regardless of earthquake magnitude.