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(left) Epicenter of aftershocks of the 2011 Tohoku earthquake Figure 2.(right) Epicenter of past main shocks
Source publication
After a large earthquake, aftershocks occur in a wide region. When aftershocks occur, many problems arise such as secondary damage or delay of recovery activity. In addition, the region where intensity of shaking due to aftershocks becomes bigger than that due to a main shock exists, which were reported in the past earthquakes. Therefore, it is nec...
Contexts in source publication
Context 1
... distribution of the aftershocks of the 2011 Tohoku earthquake is shown in Figure 1. Data of the Meteorological Agency of Japan (2012) are used and a target period is from March 11, 2011. ...
Context 2
... probabilistic aftershock occurrence can be modelled by suggested parameters and equation (3), and a result of M m =9 is shown in Figure 10. Figure 10. ...
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Citations
After an occurrence of a large earthquake, aftershocks occur subsequently in a wide region. When aftershocks occur, problems arise such as secondary damage or delay of recovery activity. In addition, the region where intensity of shaking due to aftershocks becomes bigger than that due to a main shock exists, which were reported in the past earthquakes. Therefore, it is necessary to evaluate the seismic risk due to aftershocks. In this study, using aftershocks data obtained in the events of the 2011 Tohoku earthquake and of other historical large earthquakes, the spatial and temporal distribution of aftershock occurrence is investigated and modeled based on the Gutenberg-Richter law and the Modified Omori's law. Then, a probabilistic aftershock occurrence model to predict the aftershocks of future large earthquakes is proposed.
