Examination of the correlation between tectonic landforms and shallow subsurface structural datasets for the estimation of seismic source faults

Takashi Kumamoto, Masatoshi Fujita, Hideaki Goto, Takashi Nakata

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

Estimation of the magnitudes of future earthquakes produced by faults is critical in seismic hazard assessment, especially for faults that are short in extent compared with the thickness of the seismogenic layers of the upper crust. A new seismogenic fault model for earthquake size estimation was constructed by combining (a) new assessments of the precise location and distribution of active faults from aerial photograph analysis and (b) estimations of subsurface structures from geological, gravity, and seismicity datasets. The integrated results of (1) tectonic landforms determined from aerial photographs, (2) geologic data showing the distribution of geologic faults, (3) Bouguer gravity anomaly data over wavelengths of 4–200 km, and (4) seismicity data were superimposed on geographic information system (GIS) data around the nuclear power plants in Japan. The results indicate the possible occurrence of large earthquakes, because the lengths of the subsurface earthquake faults were estimated to be longer than the length of the surface faults if subsurface structures were included.

Original languageEnglish
Title of host publicationEarthquakes, Tsunamis and Nuclear Risks: Prediction and Assessment Beyond the Fukushima Accident
PublisherSpringer Japan
Pages3-30
Number of pages28
ISBN (Print)9784431558224, 9784431558200
DOIs
Publication statusPublished - Jan 1 2016

Keywords

  • Aerial photograph analysis
  • Distribution of active faults
  • Subsurface structure

ASJC Scopus subject areas

  • Engineering(all)
  • Environmental Science(all)
  • Earth and Planetary Sciences(all)
  • Mathematics(all)

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    Kumamoto, T., Fujita, M., Goto, H., & Nakata, T. (2016). Examination of the correlation between tectonic landforms and shallow subsurface structural datasets for the estimation of seismic source faults. In Earthquakes, Tsunamis and Nuclear Risks: Prediction and Assessment Beyond the Fukushima Accident (pp. 3-30). Springer Japan. https://doi.org/10.1007/978-4-431-55822-4_1