Long term probability of a Magnitude 8 Kanto earthquake along the Sagami Trough, central Japan

2012 ◽  
Vol 64 (7) ◽  
pp. e17-e20 ◽  
Author(s):  
Masajiro Imoto ◽  
Hiroyuki Fujiwara
Keyword(s):  
Central Japan ◽  
Sagami Trough ◽  
Kanto Earthquake

Ancient and Medieval Events and Recurrence Interval of Great Kanto Earthquakes along the Sagami Trough, Central Japan, as Inferred from Historiographical Seismology

2020 ◽  
Vol 91 (5) ◽  
pp. 2579-2589 ◽  
Author(s):  
Katsuhiko Ishibashi
Keyword(s):  
Fifteenth Century ◽  
Historical Records ◽  
Interplate Earthquake ◽  
Severe Damage ◽  
Sagami Bay ◽  
Aftershock Activity ◽  
Central Japan ◽  
Sagami Trough ◽  
Kanto Earthquake ◽  
Kanto District

Abstract To know the Ancient and Medieval events and the recurrence interval of the great Kanto earthquakes such as the 1923 and 1703 ones generated by the subduction of the Philippine Sea plate along the Sagami trough, central Japan, I examined the latest dataset of historical records. I used only rank-A (contemporary) materials in the Online Database of Historical Documents on Japanese Earthquakes and Eruptions in the Ancient and Medieval Ages. Among destructive earthquakes in the Kanto district before the sixteenth century, the 878 Gangyo earthquake, which has been suspected an inland event generated from the Isehara fault, is considered the oldest candidate of the Kanto earthquake based on the large-scale disaster and intense aftershock activity, though tsunami is not mentioned. The 1293 Showo (Einin) Kamakura earthquake can be regarded as a great Kanto earthquake, because of severe damage in the Kanto district and remarkable aftershock activity. During the fifteenth century, both of the 1433 Eikyo and the 1495 Meio earthquakes are regarded as candidates of the Kanto earthquake; the former caused severe damage around Kamakura on the northern coast of Sagami Bay with high-aftershock activity and presumably caused tsunami, and the latter seems to have caused large tsunamis at Kamakura and the west coast of Sagami Bay. Although further investigation is necessary to clarify which one is the Kanto earthquake, we can say that an interplate earthquake probably occurred in the fifteenth century. Intervals between successive events, in 878, 1293, 1433 or 1495, 1703, and 1923, range from 140 to 270 yr except for the first interval of 415 yr. It is very difficult to confirm whether a great interplate earthquake occurred or not during this interval by means of historiographical seismology, because the Kanto district was in the worst situation of poor historical records in those days.

scholarly journals Long-term Probability of the Kanto M8 Earthquake along the Sagami Trough, Central Japan

2015 ◽  
Vol 15 (7) ◽  
pp. 7_173-7_179
Author(s):  
Masajiro IMOTO ◽  
Nobuyuki MORIKAWA ◽  
Hiroyuki FUJIWARA
Keyword(s):  
Central Japan ◽  
Sagami Trough

scholarly journals Plate convergence and long-term crustal deformation in central Japan

2001 ◽  
Vol 28 (12) ◽  
pp. 2313-2316 ◽  
Author(s):  
Kosuke Heki ◽  
Shin'ichi Miyazaki
Keyword(s):  
Crustal Deformation ◽  
Central Japan ◽  
Plate Convergence

scholarly journals Geologic ages and magnetic fabrics of deep-sea sediments in the Sagami Trough, central Japan

2016 ◽  
Vol 23 (0) ◽  
pp. 12-26
Author(s):  
Kiichiro Kawamura ◽  
Masayuki Oishi ◽  
Masanobu Shishikura ◽  
Saneatsu Saito ◽  
Masafumi Murayama ◽  
...  
Keyword(s):  
Deep Sea ◽  
Central Japan ◽  
Sagami Trough ◽  
Magnetic Fabrics ◽  
Deep Sea Sediments

scholarly journals Prokaryotic Community Structure of Long-Term Fertilization Field Andisols in Central Japan

2019 ◽  
Vol 8 (3) ◽  
Author(s):  
Kazumori Mise ◽  
Hitoshi Moro ◽  
Takashi Kunito ◽  
Keishi Senoo ◽  
Shigeto Otsuka
Keyword(s):  
Community Structure ◽  
Field Soil ◽  
Prokaryotic Community ◽  
Central Japan ◽  
Experimental Field ◽  
Soil Ecosystems ◽  
Fertilization Experiments

Long-term fertilization experiments are a useful way to elucidate the impacts of fertilization on soil ecosystems. Here, we report the prokaryotic community structure in experimental field soil after 80 years of successive fertilization.

Marine reservoir correction for the Pacific coast of central Japan using 14C ages of marine mollusks uplifted during historical earthquakes

2007 ◽  
Vol 67 (2) ◽  
pp. 286-291 ◽  
Author(s):  
Masanobu Shishikura ◽  
Tomoo Echigo ◽  
Heitaro Kaneda
Keyword(s):  
Radiocarbon Dating ◽  
Pacific Coast ◽  
Historical Earthquakes ◽  
The Sea Of Japan ◽  
Central Japan ◽  
South Central ◽  
Kanto Earthquake ◽  
The Pacific ◽  
Tectonically Active ◽  
Mollusk Assemblages

AbstractIn this study we utilize marine shell samples from two levels of historically uplifted sessile mollusk assemblages and raised wave-cut benches to evaluate the marine reservoir correction (ΔR) for the Pacific coast of central Japan. Elevation measurements of the uplifted marine shells indicate that the lower assemblage emerged during the 1923 Taisho Kanto earthquake (M7.9), whereas uplift of the upper assemblage is most likely but less confidently ascribed to the 1703 Genroku Kanto earthquake (M8.2). Radiocarbon dating of carefully selected samples from the upper and lower assemblages yielded very similar ΔR values of 82 ± 33 and 77 ± 32 yr, respectively. We regard the former ΔR value as a representative and more reliable value given the uncertainty in correlation of the upper assemblage with the 1703 earthquake. This result is consistent with previously reported ΔR values for the Pacific coast of south-central Japan and areas around the Sea of Japan that are influenced by warm ocean currents. Radiocarbon dating of coseismically uplifted shells can aid in estimating marine reservoir ages in the tectonically active Japan Islands.

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