Decade-scale decrease inb value prior to the M9-class 2011 Tohoku and 2004 Sumatra quakes
Article first published online: 18 OCT 2012
©2012. American Geophysical Union. All Rights Reserved.
Geophysical Research Letters
Volume 39, Issue 20, 28 October 2012
How to Cite
2012), Decade-scale decrease in b value prior to the M9-class 2011 Tohoku and 2004 Sumatra quakes, Geophys. Res. Lett., 39, L20304, doi:10.1029/2012GL052997., , , and (
- Issue published online: 18 OCT 2012
- Article first published online: 18 OCT 2012
- Manuscript Accepted: 14 SEP 2012
- Manuscript Revised: 13 SEP 2012
- Manuscript Received: 4 JUL 2012
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|grl29636-sup-0001-readme.txt||plain text document||0K||readme.txt|
|grl29636-sup-0002-fs01.eps||PS document||2858K||Figure S1. Temporal and spatial trends in b value leading up to the 2004 Sumatra earthquake.|
|grl29636-sup-0003-fs02.eps||PS document||1965K||Figure S2. Distributions of b values, their uncertainty (sigma), and completeness magnitude (Mc) off the Pacific coasts of Hokkaido, Tohoku, and Kanto for the period 1965–1989.|
|grl29636-sup-0004-fs03.eps||PS document||1996K||Figure S3. Long-term change in b value leading up to the Tohoku earthquake.|
|grl29636-sup-0005-fs04.eps||PS document||2526K||Figure S4. Distribution of b values for various radii to collect events for calculating the b value and minimum magnitudes employed in truncating the JMA catalog to discard incomplete data prior to analysis.|
|grl29636-sup-0006-fs05.eps||PS document||814K||Figure S5. A test to verify the observed decrease in b with time.|
|grl29636-sup-0007-fs06.eps||PS document||723K||Figure S6. Depth histogram of M>=2.5 seismicity used for Figure 2B, along with the plot of b values as a function of depth.|
|grl29636-sup-0008-fs07.eps||PS document||1040K||Figure S7. Distribution of b values obtained from M>=3.0 seismicity at depths of 0–60 km off the Pacific coast of Hokkaido between 1 January 2006 and 26 April 2011.|
|grl29636-sup-0009-ts01.txt||plain text document||0K||Table S1. Summary of b values calculated for M9-class earthquakes using the ANSS catalog.|
|grl29636-sup-0010-txts01.txt||plain text document||0K||Text S1. The b values obtained for M9-class earthquakes.|
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