Research on local magnitude (M L ) scale in and near the Korean Peninsula
Main Article Content
Abstract
After synthesizing Wood-Anderson seismograms from broadband recordings at FDSN stations (BJT, SSE, INC and MDJ) in and near Korea, the empirical equations, for the vertical and horizontal components, respectively, for determination of local magnitude (M L ) in and near Korea, were estimated through a process of regression. Around 200 data, from events with epicentral distance ?D) ranging from 50 km to 1000 km, measured from synthetic Wood-Anderson seismograms were used. According to the regression with the constraint that the magnitude for an amplitude of 0.001 m measured at epicentral distance of 100 km is 3, the empirical formula (log 10 A 0 ) for the horizontal components is, with standard deviation (s) of 0.52, M L = log 10 A(D) + 1.71 log 10 A 0 (D) 0.42 + C, and that for the vertical components is, with standard deviation (s) of 0.56, M L = log 10 A(D) +1.70 log 10 A 0 (D) 0.4 + C, where, C is a station correction factor and A is the amplitude. This result shows that the attenuation in and near Korea is stronger than that in the East United States (Kim, 1998) and weaker than that in South California (Kanamori et al., 1993).
Article Details
How to Cite
Kang, I. B., Jun, M. S. and Shin, J. S. (2000) “Research on local magnitude (M L ) scale in and near the Korean Peninsula”, Annals of Geophysics, 43(5). doi: 10.4401/ag-3674.
Issue
Section
OLD
Open-Access License
No Permission Required
Istituto Nazionale di Geofisica e Vulcanologia applies the Creative Commons Attribution License (CCAL) to all works we publish.
Under the CCAL, authors retain ownership of the copyright for their article, but authors allow anyone to download, reuse, reprint, modify, distribute, so long as the original authors and source are cited. No permission is required from the authors or the publishers.
In most cases, appropriate attribution can be provided by simply citing the original article.
If the item you plan to reuse is not part of a published article (e.g., a featured issue image), then please indicate the originator of the work, and the volume, issue, and date of the journal in which the item appeared. For any reuse or redistribution of a work, you must also make clear the license terms under which the work was published.
This broad license was developed to facilitate open access to, and free use of, original works of all types. Applying this standard license to your own work will ensure your right to make your work freely and openly available. For queries about the license, please contact ann.geophys@ingv.it.