Variation of the frequency-magnitude relation during earthquake sequences in New Zealand
- 1 April 1973
- journal article
- Published by Seismological Society of America (SSA) in Bulletin of the Seismological Society of America
- Vol. 63 (2), 517-528
- https://doi.org/10.1785/bssa0630020517
Abstract
Seven New Zealand earthquake sequences are studied statistically. These comprise six aftershock sequences and one earthquake swarm. The magnitude-stability law of Lomnitz does not hold. During the aftershock sequences the coefficient b, governing the frequency-magnitude relationship, is found to increase rapidly after the main shock, and then to decrease until the occurrence of the largest aftershock, when it again begins to increase. During the earthquake swarm, the coefficient b decreases logarithmically with time. This can be explained in terms of stress changes and is consistent with laboratory studies on rock deformation.Keywords
This publication has 7 references indexed in Scilit:
- Focal depths of aftershocksPublished by American Geophysical Union (AGU) ,1968
- The frequency-magnitude relation of microfracturing in rock and its relation to earthquakesBulletin of the Seismological Society of America, 1968
- Mean magnitude of an earthquake sequenceBulletin of the Seismological Society of America, 1967
- Magnitude stability in earthquake sequencesBulletin of the Seismological Society of America, 1966
- A Statistical Significance Test of the Difference in b-value between Two Earthquake GroupsJournal of Physics of the Earth, 1966
- Secular seismic energy release in the circum-Pacific beltTectonophysics, 1965
- Earthquakes and rock creepBulletin of the Seismological Society of America, 1951