Fracture-zone conditions on a recently active fault: insights from mineralogical and geochemical analyses of the Hirabayashi NIED drill core on the Nojima fault, southwest Japan, which ruptured in the 1995 Kobe earthquake

2004 ◽  
Vol 378 (3-4) ◽  
pp. 143-163 ◽  
Author(s):  
Tatsuo Matsuda ◽  
Kentaro Omura ◽  
Ryuji Ikeda ◽  
Takashi Arai ◽  
Kenta Kobayashi ◽  
...  
Keyword(s):  
Fracture Zone ◽  
Active Fault ◽  
Drill Core ◽  
Southwest Japan ◽  
Kobe Earthquake ◽  
Nojima Fault ◽  
Geochemical Analyses

scholarly journals Preliminary paleoearthquake investigations of active faults on Awaji Island, Japan,
 in relation to the 1995 Great Hanshin (Kobe) earthquake

1996 ◽  
Vol 29 (3) ◽  
pp. 172-177
Author(s):  
R. Van Dissen ◽  
J. Begg ◽  
Y. Awata
Keyword(s):  
New Zealand ◽  
Active Fault ◽  
Active Faults ◽  
Geological Survey ◽  
Historical Records ◽  
Surface Rupture ◽  
Kobe Earthquake ◽  
Nojima Fault ◽  
One Year ◽  
Hanshin Earthquake

Approximately one year after the Great Hanshin (Kobe) Earthquake, two New Zealand geologists were invited to help with the Geological Survey of Japan's paleoearthquake/active fault studies in the Kobe/Awaji area. Trenches excavated across the Nojima fault, which ruptured during the Great Hanshin Earthquake, showed evidence of past surface rupture earthquakes, with the age of the penultimate earthquake estimated at approximately 2000 years. A trench across the Higashiura fault, located 3-4 km southeast of the Nojima fault, revealed at least two past surface rupture earthquakes. The timing of the older earthquakes is not yet known, but pottery fragments found in the trench constrain the timing of the most recent earthquake at less than 500-600 years. Historical records for this part of Japan suggest that within the last 700 years there has been only one regionally felt earthquake prior to the 1995 Great Hanshin Earthquake, and this was the AD 1596 Keicho Earthquake. It thus seems reasonable to suggest that the Higashiura fault was, at least in part, the source of the AD 1596 Keicho Earthquake.

Distribution of fault rocks in the fracture zone of the Nojima Fault at a depth of 1140 m: Observations from the Hirabayashi NIED drill core

Island Arc ◽  
2001 ◽  
Vol 10 (3-4) ◽  
pp. 411-421 ◽  
Author(s):  
Kenta Kobayashi ◽  
Satoshi Hirano ◽  
Takashi Arai ◽  
Ryuji Ikeda ◽  
Kentaro Omura ◽  
...  
Keyword(s):  
Fracture Zone ◽  
Drill Core ◽  
Fault Rocks ◽  
Nojima Fault

scholarly journals Fault rocks and past to recent fluid characteristics from the borehole survey of the Nojima fault ruptured in the 1995 Kobe earthquake, southwest Japan

2000 ◽  
Vol 105 (B7) ◽  
pp. 16161-16171 ◽  
Author(s):  
Tomoyuki Ohtani ◽  
Koichiro Fujimoto ◽  
Hisao Ito ◽  
Hidemi Tanaka ◽  
Naoto Tomida ◽  
...  
Keyword(s):  
Southwest Japan ◽  
Fault Rocks ◽  
Kobe Earthquake ◽  
Nojima Fault ◽  
Fluid Characteristics

scholarly journals Tree-ring response to the 1995 M<sub>w</sub> 7.2 Kobe earthquake, southwest Japan

2017 ◽  
Author(s):  
Sujian Lin ◽  
Aiming Lin
Keyword(s):  
Tree Rings ◽  
Lateral Displacement ◽  
Fault Scarp ◽  
Fagus Crenata ◽  
Southwest Japan ◽  
Fagus Crenata Blume ◽  
Kobe Earthquake ◽  
Seismic Fault ◽  
Beech Tree ◽  
Nojima Fault

Abstract. The 1995 Mw 7.2 Kobe earthquake produced an ~ 18 km-long surface rupture zone with a maximum right-lateral displacement of ~ 1.8 m along the pre-existing active Nojima Fault in southwest Japan. Field investigations showed that the co-seismic surface ruptures caused severe damage to trees, some of which survived the disaster during the past twenty years along the co-seismic fault scarp. Analysis of tree-rings from the trunk of a 46-year-old Beech tree (Fagus crenata Blume) revealed that the tree was cracked by earthquake-induced damage and that the tree-rings grown during the five-year period after the 1995 earthquake become sharply narrower in width compared to those grown before the earthquake. Our findings indicate that the earthquake damaged trees along the co-seismic fault scarp and hindered the growth of tree-rings by severing the roots. Thus, the results support the idea that older trees growing along or around fault zones can be used for identifying seismic fault events and for dendrochronological studies related to geomorphological processes.

scholarly journals Occurrence of the marginal fracture zone in the 1800m drill core penetrating throughout the Nojima fault

1999 ◽  
Vol 105 (10) ◽  
pp. XIX-XX ◽  
Author(s):  
Kenta Kobayashi ◽  
Tatsuro Fukuchi ◽  
Noriko Hasebe ◽  
Aiming Lin ◽  
Tadashi Maruyama ◽  
...  
Keyword(s):  
Fracture Zone ◽  
Drill Core ◽  
Nojima Fault

Distribution of fault rocks in the fracture zone of the Nojima Fault at a depth of 1140 m: Observations from the Hirabayashi NIED drill core

Island Arc ◽  
2008 ◽  
Vol 10 (3-4) ◽  
pp. 411-421 ◽  
Author(s):  
Kenta Kobayashi ◽  
Satoshi Hirano ◽  
Takashi Arai ◽  
Ryuji Ikeda ◽  
Kentaro Omura ◽  
...  
Keyword(s):  
Fracture Zone ◽  
Drill Core ◽  
Fault Rocks ◽  
Nojima Fault

scholarly journals Trenching study on the Tonoda Fault of the Mitoke Active Fault System at Sekibayashi, Kyoto Prefecture, Southwest Japan

2000 ◽  
Vol 109 (1) ◽  
pp. 73-86
Author(s):  
Yoshihiro UEMURA ◽  
Atsumasa OKADA ◽  
Heitarou KANEDA ◽  
Daisaku KAWABATA ◽  
Keiji TAKEMURA ◽  
...  
Keyword(s):  
Active Fault ◽  
Fault System ◽  
Southwest Japan

scholarly journals Latest Rupture Event of the Mino Fault, the Median Tectonic Line Active Fault System, in East Shikoku, Southwest Japan.

2002 ◽  
Vol 111 (5) ◽  
pp. 661-683 ◽  
Author(s):  
Michio MORINO ◽  
Atsumasa OKADA ◽  
Takashi NAKATA ◽  
Koji MATSUNAMI ◽  
Masayoshi KUSAKA ◽  
...  
Keyword(s):  
Active Fault ◽  
Fault System ◽  
Southwest Japan ◽  
Median Tectonic Line ◽  
Tectonic Line
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