Crustal Deformation Associated with the 2011 Tohoku-Oki Earthquake: An Overview

2013 ◽  
Vol 29 (1_suppl) ◽  
pp. 81-98 ◽  
Author(s):  
Manabu Hashimoto
Keyword(s):  
Crustal Deformation ◽  
Large Displacements ◽  
Sea Floor ◽  
Gps Network ◽  
Coseismic Subsidence ◽  
Japanese Islands ◽  
East West

The 2011 Tohoku-oki earthquake generated large displacements in and around the Japanese islands that were detected by the nationwide GPS network, sea-floor geodetic surveys, and space-borne radars. The east-west extension exerted on the Japanese islands by this event induced inland events of Mw6 or larger earthquakes. Coseismic subsidence of up to 1 m was observed along the coast where subsidence was found during the interseismic period. This observation contradicts expectations based on the concept of the recurrence of inter-plate earthquakes. Therefore, postseismic motions or other large events are expected to resolve this paradox.

A Proposal on Ultimate Safety Disposal of High Level Radioactive Wastes

2013 ◽  
Author(s):  
Hidekazu Yoshikawa
Keyword(s):  
Pacific Ocean ◽  
Radioactive Wastes ◽  
Spent Fuel ◽  
Sea Floor ◽  
The Past ◽  
Underground Disposal ◽  
Resource Exploration ◽  
High Level ◽  
Japanese Islands ◽  
Earth Resource

The ultimate disposal of high-level radioactive waste (HLW) becomes a hard issue for sustainable nuclear energy in Japan especially after Fukushima Daiichi accident. In this paper, the difficulty of realizing underground HLW disposal in Japanese islands is first discussed from socio-political aspects. Then, revival of old idea of deep seabed disposal of HLW in Pacific Ocean is proposed as an alternative way of HLW disposal. Although this had been abandoned in the past for the reason that it will violate London Convention which prohibits dumping radioactive wastes in public sea, the author will stress the merit of seabed disposal of HLW deep in Pacific Ocean not only from the view point of more safe and ultimate way of disposing HLWs (both vitrified and spent fuel) than by underground disposal, but also the emergence of new marine project by synergetic collaboration of rare-earth resource exploration from the deep sea floor in Pacific Ocean.

scholarly journals Present-day crustal deformation along the El Salvador Fault Zone from ZFESNet GPS network

2016 ◽  
Vol 670 ◽  
pp. 66-81 ◽  
Author(s):  
Alejandra Staller ◽  
José Jesús Martínez-Díaz ◽  
Belén Benito ◽  
Jorge Alonso-Henar ◽  
Douglas Hernández ◽  
...  
Keyword(s):  
El Salvador ◽  
Fault Zone ◽  
Crustal Deformation ◽  
Gps Network

Metamorphic Rocks of the Sea Floor between Start Point and Dodman Point, S.W. England

1964 ◽  
Vol 44 (3) ◽  
pp. 655-663 ◽  
Author(s):  
F. C. Phillips
Keyword(s):  
Near East ◽  
Metamorphic Rocks ◽  
Mica Schist ◽  
Marine Biological Laboratory ◽  
The West ◽  
Additional Material ◽  
Maximum Width ◽  
Sea Floor ◽  
East West

As part of the programme of study of the geology of the western approaches initiated at Bristol by Prof. W. F. Whittard (Whittard, 1962) information has been accumulated concerning the distribution and nature of the metamorphic rocks exposed in a series of inliers between Start Point in the east and Dodman Point in the west.Early dredgings in this area were described by Worth (1908). Six core samples and two dredgings of metamorphic rocks are listed by Hill & King (1953). Mica schist in situ is recorded by Holme (1953). Various cruises in R.V. ‘Sarsia’ from 1957 onwards have yielded seventeen cores and further dredged samples. Additional material, collected from the exposed parts of the Eddystone reefs or obtained by diving at critical localities, has become available through the kindness of members of the staff of the Marine Biological Laboratory at Plymouth.Sixteen cores and eight dredged samples serve to demarcate an area of schistose rocks, extending some 24 miles from east to west and 7 miles in maximum width from north to south, off the southernmost part of Devon (Fig. 1). These rocks, with an exception to be noted, compare closely with those exposed on land, between Bolt Tail and Start Point, south of a well defined east-west boundary (Ussher, 1904; Tilley, 1923). There are examples of quartz-muscovite-chlorite schists precisely like the Start Mica-schists and Bolt Mica-schists described by Tilley. Albite porphyroblasts, in a rock dredged near East Rutts (Fig. I, 1262) which is transitional to Tilley's ‘schists of composite origin’, show well the contorted swarms of carbonaceous inclusions which he describes (1923, p. 180).

A Decade of Challenge the Future of Biogeography

1985 ◽  
Vol 4 (2) ◽  
pp. 187-196 ◽  
Author(s):  
Gareth Nelson
Keyword(s):  
Critical Evaluation ◽  
Pacific Basin ◽  
Main Task ◽  
Radial Expansion ◽  
Sea Floor ◽  
Biogeographic Patterns ◽  
The Pacific ◽  
The Difference ◽  
Sea Floor Spreading ◽  
East West

According to Croizat's global synthesis, the main biogeographic patterns include trans-Atlantic, trans-Pacific, trans-Indoceanic, Boreal, and Austral. Geological and geophysical theories vary, but agree that sea-floor spreading in the Pacific is different in its effect from that in other ocean basins. The difference allows for radial expansion of the basin and not merely east-west displacement of continental areas. Biogeographic data suggest that bipolar (boreal + austral) distributions are to be reckoned among the results of sea-floor spreading in the Pacific. Data from one group of inshore fishes (family Engraulidae) exemplify this notion and add, as terminal parts of the differentiation of the Pacific Basin, trans-Panama marine vicariance and a collateral occurrence in freshwater of tropical South America. These findings corroborate Croizat's synthesis. They suggest that the critical evaluation of that synthesis will be the main task of biogeography over the next decade. They indicate that within the area of systematics, evaluation will require a cladistic approach and the elimination of paraphyletic groups from classification.

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