Forecast model for great earthquakes at the Nankai Trough subduction zone

1988 ◽  
Vol 126 (2-4) ◽  
pp. 619-641 ◽  
Author(s):  
William D. Stuart
Keyword(s):  
Subduction Zone ◽  
Nankai Trough ◽  
Forecast Model ◽  
Great Earthquakes

Imaging of the subducted Kyushu-Palau Ridge in the Hyuga-nada region, western Nankai Trough subduction zone

2013 ◽  
Vol 589 ◽  
pp. 90-102 ◽  
Author(s):  
Yojiro Yamamoto ◽  
Koichiro Obana ◽  
Tsutomu Takahashi ◽  
Ayako Nakanishi ◽  
Shuichi Kodaira ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Nankai Trough

Simulation of Tsunamis from Great Earthquakes on the Cascadia Subduction Zone

Science ◽  
1990 ◽  
Vol 250 (4985) ◽  
pp. 1248-1251 ◽  
Author(s):  
M. K.-F. Ng ◽  
P. H. Leblond ◽  
T. S. Murty
Keyword(s):  
Subduction Zone ◽  
Cascadia Subduction Zone ◽  
Great Earthquakes

scholarly journals Temperature limits to deep subseafloor life in the Nankai Trough subduction zone

Science ◽  
2020 ◽  
Vol 370 (6521) ◽  
pp. 1230-1234
Author(s):  
Verena B. Heuer ◽  
Fumio Inagaki ◽  
Yuki Morono ◽  
Yusuke Kubo ◽  
Arthur J. Spivack ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Marine Sediment ◽  
Nankai Trough ◽  
Microbial Populations ◽  
Vegetative Cells ◽  
Microbial Life ◽  
Sediment Volume ◽  
Subsurface Sediments ◽  
Cell Concentrations ◽  
Deep Subseafloor

Microorganisms in marine subsurface sediments substantially contribute to global biomass. Sediments warmer than 40°C account for roughly half the marine sediment volume, but the processes mediated by microbial populations in these hard-to-access environments are poorly understood. We investigated microbial life in up to 1.2-kilometer-deep and up to 120°C hot sediments in the Nankai Trough subduction zone. Above 45°C, concentrations of vegetative cells drop two orders of magnitude and endospores become more than 6000 times more abundant than vegetative cells. Methane is biologically produced and oxidized until sediments reach 80° to 85°C. In 100° to 120°C sediments, isotopic evidence and increased cell concentrations demonstrate the activity of acetate-degrading hyperthermophiles. Above 45°C, populated zones alternate with zones up to 192 meters thick where microbes were undetectable.

scholarly journals Hydrocarbon seepage and its sources at mud volcanoes of the Kumano forearc basin, Nankai Trough subduction zone

2014 ◽  
Vol 15 (6) ◽  
pp. 2180-2194 ◽  
Author(s):  
Thomas Pape ◽  
Patrizia Geprägs ◽  
Sebastian Hammerschmidt ◽  
Paul Wintersteller ◽  
Jiangong Wei ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Nankai Trough ◽  
Mud Volcanoes ◽  
Forearc Basin

The great Lisbon earthquake and tsunami of 1755: lessons from the recent Sumatra earthquakes and possible link to Plato's Atlantis

2006 ◽  
Vol 14 (2) ◽  
pp. 181-191 ◽  
Author(s):  
M.-A. GUTSCHER
Keyword(s):  
Subduction Zone ◽  
Subduction Zones ◽  
Coarse Grained ◽  
Great Earthquake ◽  
Seismic Profiles ◽  
Great Earthquakes ◽  
Lisbon Earthquake ◽  
Southern Iberia ◽  
High Resolution Bathymetry ◽  
Sumatra Earthquakes

Great earthquakes and tsunami can have a tremendous societal impact. The Lisbon earthquake and tsunami of 1755 caused tens of thousands of deaths in Portugal, Spain and NW Morocco. Felt as far as Hamburg and the Azores islands, its magnitude is estimated to be 8.5–9. However, because of the complex tectonics in Southern Iberia, the fault that produced the earthquake has not yet been clearly identified. Recently acquired data from the Gulf of Cadiz area (tomography, seismic profiles, high-resolution bathymetry, sampled active mud volcanoes) provide strong evidence for an active east dipping subduction zone beneath Gibraltar. Eleven out of 12 of the strongest earthquakes (M>8.5) of the past 100 years occurred along subduction zone megathrusts (including the December 2004 and March 2005 Sumatra earthquakes). Thus, it appears likely that the 1755 earthquake and tsunami were generated in a similar fashion, along the shallow east-dipping subduction fault plane. This implies that the Cadiz subduction zone is locked (like the Cascadia and Nankai/Japan subduction zones), with great earthquakes occurring over long return periods. Indeed, the regional paleoseismic record (contained in deep-water turbidites and shallow lagoon deposits) suggests great earthquakes off South West Iberia every 1500–2000 years. Tsunami deposits indicate an earlier great earthquake struck SW Iberia around 200 BC, as noted by Roman records from Cadiz. A written record of even older events may also exist. According to Plato's dialogues The Critias and The Timaeus, Atlantis was destroyed by ‘strong earthquakes and floods … in a single day and night’ at a date given as 11,600 BP. A 1 m thick turbidite deposit, containing coarse grained sediments from underwater avalanches, has been dated at 12,000 BP and may correspond to the destructive earthquake and tsunami described by Plato. The effects on a paleo-island (Spartel) in the straits of Gibraltar would have been devastating, if inhabited, and may have formed the basis for the Atlantis legend.

Foreshock Patterns Preceding Great Earthquakes in the Subduction Zone of Chile

2016 ◽  
Vol 173 (10-11) ◽  
pp. 3247-3271 ◽  
Author(s):  
G. A. Papadopoulos ◽  
G. Minadakis
Keyword(s):  
Subduction Zone ◽  
Great Earthquakes

Confidence levels for tsunami-inundation limits in northern Oregon inferred from a 10,000-year history of great earthquakes at the Cascadia subduction zone

2009 ◽  
Vol 54 (1) ◽  
pp. 27-73 ◽  
Author(s):  
George R. Priest ◽  
Chris Goldfinger ◽  
Kelin Wang ◽  
Robert C. Witter ◽  
Yinglong Zhang ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Cascadia Subduction Zone ◽  
Tsunami Inundation ◽  
Confidence Levels ◽  
Great Earthquakes ◽  
History Of
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