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Accession number;99A0772166
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| Title;Relationship between Fractal Dimension and b-value for Swarm Earthquakes Which Occurred off Eastern Coast of Izu Peninsula, Central Japan. |
| Author;
MURASE KEI
(Tokai Univ., Grad. Sch.)
IIZUKA SUSUMU
(Tokai Univ., Sch. of Mar. Sci. and Technol.)
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Journal Title;Journal of the Seismological Society of Japan. Second Series
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Journal Code:G0931A
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ISSN:0037-1114
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VOL.52;NO.1;PAGE.1-9(1999)
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| Figure&Table&Reference;FIG.5, REF.29 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;We analyzed the fractal natures of swarm earthquakes which occurred off the eastern coast of Izu Peninsula, central Japan, using the JMA Earthquake Catalogue data during the period of 1983-1997. The spatial fractal dimension D- and the b-value of the Gutenberg-Richter formula were used for the seismic fractal analysis. The significant temporal variations of both parameters were detected for 8 typical swarm activities and classified in two groups. One is a positive correlation, and the other is a negative correlation between D- and b-values. The former case seems to correspond with ordinary swarm activities, while in the latter case some direct volcanic activities such as eruptions are accompanied by earthquake swarms. Consequently a negative correlation in D- and b-values may play an important role as an indicator of volcanic eruptions. (author abst.) |
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