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- W2605654871 abstract "We investigated the spatial distribution of Mc value of the magnitude-frequency distribution proposed by Utsu (1971) for the region of east off northeast Japan. Mc is a model parameter that defines the upper limit of earthquake magnitude. We further examined the possibility of estimating the maximum earthquake magnitude based on Mc for a given region. The data we used are taken from the earthquake catalog of the Research Center for Prediction of Earthquakes and Volcanic Eruptions of Tohoku University for last 21 years. The magnitudes of M≥5 earthquakes in the catalog are replaced with those of the Japan Metrological Agency catalog to keep the continuity of magnitude scale. By using a moving window of 0.5°×0.5° for the analysis, we found a systematic pattern of the Mc distribution: the area of Mc>7 distributes off Aomori Prefecture, far off Iwate Prefecture, and off Miyagi and Fukushima Prefectures, while anomalously small value (Mc<6) prevails in a roughly 1°×1° area within 100km off the coast of Iwate Prefecture. Mc we estimated shows positive but weak correlation to Mcat, the maximum magnitude for last 115 years. By dividing the whole region into four zones based on the above result, we found excellent agreement between Mc and Mcat for each zone. This suggests that Mc may be used for predicting the maximum size of future earthquakes if appropriate zoning is done. Epicenters of past large earthquakes (M≥7) tend to locate in and near the high Mc areas, suggesting that the parameter Mc may reflect physical characteristics of earthquake generating field." @default.
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- W2605654871 date "2003-01-01" @default.
- W2605654871 modified "2023-10-18" @default.
- W2605654871 title "Possibility of Estimating the Maximum Earthquake Magnitude Based on a Modified G-R Model for Magnitude-Frequency Distribution" @default.
- W2605654871 doi "https://doi.org/10.4294/zisin1948.56.3_255" @default.
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