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Seismological evidence indicating rupture along an eastward dipping fault plane for the 1964 Niigata, Japan earthquake.
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- MORI Jim
- Lamont-Doherty Geological Observatory and Department of Geological Sciences of Columbia University
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- BOYD Thomas
- Lamont-Doherty Geological Observatory and Department of Geological Sciences of Columbia University
Bibliographic Information
- Other Title
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- Seismological evidence indicating rupture along an eastward dipping fault plane for the 1964 Niigata
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Description
The Niigata earthquake of June 16, 1964. (M8=7.5) is studied using a body-wave inversion technique on teleseismic P waveforms of the mainshock and a joint hypocenter determination of 27 of the largest (MJMA≥4.0) regionally recorded aftershocks. The mainshock is interpreted as being composed of two subevents with moments of 2.1×1026 dyn-cm and 2.0×1027 dyn-cm. The focal mechanism indicates that faulting could have occurred on either a plane dipping toward the west or a plane dipping toward the east. The initial subevent is located at a depth of 8 to 13 km, while the centroid of the second sub-event is located 27 km southwest of the first and at a depth of 3 km. The relocated aftershocks all appear to have depths of less than 15 km which is consistent with the depths obtained for the mainshock. They appear to define a trend dipping shallowly toward the east which is consistent with the relative locations of the two subevents comprising the mainshock. We conclude, therefore, that a fault plane dipping toward the east is more consistent with the relative locations of the two subevents and the relocations of the aftershocks.
Journal
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- Journal of Physics of the Earth
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Journal of Physics of the Earth 33 (3), 227-240, 1985
The Seismological Society of Japan, The Volcanological Society of Japan, The Geodetic Society of Japan
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Details 詳細情報について
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- CRID
- 1390282681487681280
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- NII Article ID
- 130003785262
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- ISSN
- 18842305
- 00223743
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed