Seismicity perspectives - School of Earth and Environment
... temporal coincidence between deflation signals and migrating earthquakes observed in some rifts suggest that dike widening stops when deflation stops at the source [e.g., Einarsson, 1991; Yamaoka et al., 2005]. [3] Within tectonic rifts, dike feeder zones are located within the crust, and dikes are ...
... temporal coincidence between deflation signals and migrating earthquakes observed in some rifts suggest that dike widening stops when deflation stops at the source [e.g., Einarsson, 1991; Yamaoka et al., 2005]. [3] Within tectonic rifts, dike feeder zones are located within the crust, and dikes are ...
Tohoku Chapter, Architectural Institute of Japan Quick
... This report includes photos taken by Mr. Ishioka of Ishinomaki Technical High School. The photos depict the damage caused by tsunamis. He was confined in his school from immediately after the earthquake on March 11 to noon on March 12. Mr. Ishioka sent the following message; Two weeks have passed si ...
... This report includes photos taken by Mr. Ishioka of Ishinomaki Technical High School. The photos depict the damage caused by tsunamis. He was confined in his school from immediately after the earthquake on March 11 to noon on March 12. Mr. Ishioka sent the following message; Two weeks have passed si ...
Landslides, earthquakes, and erosion
... q+1=2.40. Many authors (see [1] for a review) have also noted that the frequency–area distribution of large landslides correlate with a power-law tail. This common behaviour is observed despite large differences in landslide types, topography, soil types, and triggering mechanisms. ...
... q+1=2.40. Many authors (see [1] for a review) have also noted that the frequency–area distribution of large landslides correlate with a power-law tail. This common behaviour is observed despite large differences in landslide types, topography, soil types, and triggering mechanisms. ...
Probabilistic prediction of rupture length, slip and
... relationship between seismic slip and rupture length. We find that the larger the present slip amplitude Dp , the higher is the probability for the continuation of a rupture and the evolution into a ‘Big One’, that is, a long remaining rupture length Lr (Yamada 2007). We also find that the Dp –Lr re ...
... relationship between seismic slip and rupture length. We find that the larger the present slip amplitude Dp , the higher is the probability for the continuation of a rupture and the evolution into a ‘Big One’, that is, a long remaining rupture length Lr (Yamada 2007). We also find that the Dp –Lr re ...
Practice 3rd Exam Ge..
... a. Richter scale c. seismic-moment magnitude scale b. Mercalli scale ____ 40. Which earthquake severity scale takes into account the type of rock that has been fractured? a. Richter scale c. seismic-moment magnitude scale b. Mercalli scale ____ 41. An earthquake occurs with an epicenter in the town ...
... a. Richter scale c. seismic-moment magnitude scale b. Mercalli scale ____ 40. Which earthquake severity scale takes into account the type of rock that has been fractured? a. Richter scale c. seismic-moment magnitude scale b. Mercalli scale ____ 41. An earthquake occurs with an epicenter in the town ...
determination of fault plane orientations from rupture directivity of
... Wadati [1927], this unexpected result of brittle deformation in a ductile region presents a fundamental problem in geophysics. In view of the discovery of intermediate and deep-focus earthquakes, several physical mechanisms have been hypothesized to explain their occurrence. Proposed mechanisms incl ...
... Wadati [1927], this unexpected result of brittle deformation in a ductile region presents a fundamental problem in geophysics. In view of the discovery of intermediate and deep-focus earthquakes, several physical mechanisms have been hypothesized to explain their occurrence. Proposed mechanisms incl ...
Maximum Magnitude of Induced Earthquakes in the Groningen Gas
... from the perturbed reservoir zone), the faults were not critically stressed (not close to failure). However, the stress state in the reservoir has been altered due to depletion, bringing a subset of faults to a critical state and initiating events in the reservoir interval. Once started, an earthqua ...
... from the perturbed reservoir zone), the faults were not critically stressed (not close to failure). However, the stress state in the reservoir has been altered due to depletion, bringing a subset of faults to a critical state and initiating events in the reservoir interval. Once started, an earthqua ...
Characterization of Fault Zones
... results associated with mature large-displacement faults are compatible with the standard continuumEuclidean framework. This can be explained by a positive feedback mechanism associated with strain weakening rheology and localization, which attracts the long-term evolution of faults toward progressi ...
... results associated with mature large-displacement faults are compatible with the standard continuumEuclidean framework. This can be explained by a positive feedback mechanism associated with strain weakening rheology and localization, which attracts the long-term evolution of faults toward progressi ...
3. Design of Structures, Components, Equipment and Systems
... histories is used as the input in the dynamic analysis of seismic Category I structures. The synthetic time histories were generated by modifying a set of actual recorded "TAFT" earthquake time histories. The design time histories include a total time duration equal to 20 seconds and a corresponding ...
... histories is used as the input in the dynamic analysis of seismic Category I structures. The synthetic time histories were generated by modifying a set of actual recorded "TAFT" earthquake time histories. The design time histories include a total time duration equal to 20 seconds and a corresponding ...
3. Design of Structures, Components, Equipment and Systems
... histories is used as the input in the dynamic analysis of seismic Category I structures. The synthetic time histories were generated by modifying a set of actual recorded "TAFT" earthquake time histories. The design time histories include a total time duration equal to 20 seconds and a corresponding ...
... histories is used as the input in the dynamic analysis of seismic Category I structures. The synthetic time histories were generated by modifying a set of actual recorded "TAFT" earthquake time histories. The design time histories include a total time duration equal to 20 seconds and a corresponding ...
TOPICAL REPORT YMPITR-002-NP: METHODOLOGY TO ASSESS FAULT DISPLACEMENTAND VIBRATORY GROUND
... This topical report documents die methodology that will be used in a probabilistic assessment of the fault displacement and vibratory ground motion hazards at Yucca Mountain. The seismic hazards identified by this methodology will be used to support design, performance assessment, and regulatory com ...
... This topical report documents die methodology that will be used in a probabilistic assessment of the fault displacement and vibratory ground motion hazards at Yucca Mountain. The seismic hazards identified by this methodology will be used to support design, performance assessment, and regulatory com ...
Radon as an Earthquake Precursor – Methods
... hydrologic cycle, which has to be considered during the data analysis. To define the mean and standard deviation, anomalously high and low values – which may cause unnecessary high deviation and perturb the real anomalies – have to be neglected. The periods when radon concentration deviates by more ...
... hydrologic cycle, which has to be considered during the data analysis. To define the mean and standard deviation, anomalously high and low values – which may cause unnecessary high deviation and perturb the real anomalies – have to be neglected. The periods when radon concentration deviates by more ...
The Performance of Earthquake Strengthened URM Buildings in the
... A diagram that shows the peak ground acceleration that a building of a specific period will be subjected to. The spectra can be used to assess both the seismic inertial forces induced in an elastically responding structure and the amount of induced displacement relative to the ground A structural el ...
... A diagram that shows the peak ground acceleration that a building of a specific period will be subjected to. The spectra can be used to assess both the seismic inertial forces induced in an elastically responding structure and the amount of induced displacement relative to the ground A structural el ...
Source mechanisms of dike-induced earthquakes in the Dabbahu
... and full moment tensor (FMT). The solutions obtained using the different models indicate that the earthquakes have non-double couple components. The best double-couple mechanisms, which are mainly normal faulting with small strike-slip components, have slip planes nearly perpendicular to the geodeti ...
... and full moment tensor (FMT). The solutions obtained using the different models indicate that the earthquakes have non-double couple components. The best double-couple mechanisms, which are mainly normal faulting with small strike-slip components, have slip planes nearly perpendicular to the geodeti ...
Geometry of the PamirHindu Kush intermediatedepth earthquake
... 4. Automatized Processing of Local Seismicity Data [8] The rate of seismicity in our study region during the recording time was so high that conventional processing, ...
... 4. Automatized Processing of Local Seismicity Data [8] The rate of seismicity in our study region during the recording time was so high that conventional processing, ...
improvement of regional seismic hazard assessment considering
... Seismic hazard assessment is a required procedure to assist effective designing of structures located in seismically active regions. Traditionally, in a seismically active region as Greece, the seismic hazard evaluation was based primarily on the historical seismicity, and to lesser extent based on ...
... Seismic hazard assessment is a required procedure to assist effective designing of structures located in seismically active regions. Traditionally, in a seismically active region as Greece, the seismic hazard evaluation was based primarily on the historical seismicity, and to lesser extent based on ...
Seismicity and earthquake hazard analysis of the Teton
... Jackson Lake seismic network that operated from 1986–2002. An earthquake catalog was then developed for 1986–2002 for the Teton region using relocated hypocenters. The resulting data revealed a seismically quiescent Teton fault, at ML, local magnitude > 3, with diffuse seismicity in the southern Jac ...
... Jackson Lake seismic network that operated from 1986–2002. An earthquake catalog was then developed for 1986–2002 for the Teton region using relocated hypocenters. The resulting data revealed a seismically quiescent Teton fault, at ML, local magnitude > 3, with diffuse seismicity in the southern Jac ...
Spatiotemporal relationships between earthquakes of the Mid
... Europe (43oN to 54oN) exhibits diffuse seismicity with the largest known earthquakes rarely greater than magnitude 4 (Tesauro et al., 2006). This seismicity seems to be concentrated on old zones of weakness that are reactivated by the present-day stress field (Ziegler, 1992). A large number of the e ...
... Europe (43oN to 54oN) exhibits diffuse seismicity with the largest known earthquakes rarely greater than magnitude 4 (Tesauro et al., 2006). This seismicity seems to be concentrated on old zones of weakness that are reactivated by the present-day stress field (Ziegler, 1992). A large number of the e ...
PDF version - Bullard Laboratories
... than is typical for oceanic lithosphere. As the majority of events we study are deeper than the interface at the base of the crustal layer, and the thickness of the sediment layer is small compared to the wavelength of the body-waves used, this approximation will not have a significant effect on our ...
... than is typical for oceanic lithosphere. As the majority of events we study are deeper than the interface at the base of the crustal layer, and the thickness of the sediment layer is small compared to the wavelength of the body-waves used, this approximation will not have a significant effect on our ...
Deliverable 3.2 - version 2 - Website for the dissemination of long
... complemented with the descriptions of the steps that the SHARE catalogue underwent since its first release in April 2011, which are briefly summarized in the following. 1. SHEEC was first released on 13 April 2011, as deliverable D3.2 of the Project. The catalogue was made available as two separate ...
... complemented with the descriptions of the steps that the SHARE catalogue underwent since its first release in April 2011, which are briefly summarized in the following. 1. SHEEC was first released on 13 April 2011, as deliverable D3.2 of the Project. The catalogue was made available as two separate ...
Short-Term Earthquake Hazard Assessment for
... southern San Andreas fault and will be again. When that happens, seismologists will be expected to advise state and local officials about the potential for further activity on the fault. In particular, they will be asked if the activity could be a precursor to the "Big One." It seems prudent to cons ...
... southern San Andreas fault and will be again. When that happens, seismologists will be expected to advise state and local officials about the potential for further activity on the fault. In particular, they will be asked if the activity could be a precursor to the "Big One." It seems prudent to cons ...
Seismicity and active tectonics in the Alboran Sea, Western
... the boundary between the African and Eurasian plates. Slab rollback is now considered as the major process that during the last 25–30 Myr has been responsible for controlling the present shape of the Mediterranean region [Royden, 1993; Faccenna et al., 2001; Mauffret et al., 2004; Sparkman and Worte ...
... the boundary between the African and Eurasian plates. Slab rollback is now considered as the major process that during the last 25–30 Myr has been responsible for controlling the present shape of the Mediterranean region [Royden, 1993; Faccenna et al., 2001; Mauffret et al., 2004; Sparkman and Worte ...
OUTER RISE SEISMICITY OF THE SUBDUCTING NAZCA PLATE
... Forsyth, 1979; Christensen and Ruff, 1988]. Compressional events occur in much fewer numbers and at deeper depths than tensional earthquakes in the outer rise. Lefeldt et al. [2009] suggest that outer rise events larger than Mw=5 might create faults that may allow sea water to penetrate the plate do ...
... Forsyth, 1979; Christensen and Ruff, 1988]. Compressional events occur in much fewer numbers and at deeper depths than tensional earthquakes in the outer rise. Lefeldt et al. [2009] suggest that outer rise events larger than Mw=5 might create faults that may allow sea water to penetrate the plate do ...
Subducted seafloor relief stops rupture in South American great
... km in the trench-parallel direction, making it possible to identify parts of the plate ...
... km in the trench-parallel direction, making it possible to identify parts of the plate ...
Earthquake swarm and b-value characterization of the Yellowstone
... events were used because they have RMS values less than 0.5 s. A total of 123 quality D events were rejected from the analysis ranging in magnitude from less than 0 to 3.5. Also, only earthquakes from 1984 to 2006 were used in this study because of the more consistent and reliable nature of the magn ...
... events were used because they have RMS values less than 0.5 s. A total of 123 quality D events were rejected from the analysis ranging in magnitude from less than 0 to 3.5. Also, only earthquakes from 1984 to 2006 were used in this study because of the more consistent and reliable nature of the magn ...
Kashiwazaki-Kariwa Nuclear Power Plant
The Kashiwazaki-Kariwa Nuclear Power Plant (柏崎刈羽原子力発電所, Kashiwazaki-Kariwa genshiryoku-hatsudensho, Kashiwazaki-Kariwa NPP) is a large, modern (housing the world's first ABWR) nuclear power plant on a 4.2-square-kilometer (1,038 acres) site including land in the towns of Kashiwazaki and Kariwa in Niigata Prefecture, Japan on the coast of the Sea of Japan, from where it gets cooling water. The plant is owned and operated by Tokyo Electric Power Company (TEPCO).It was the largest nuclear generating station in the world by net electrical power rating.It was approximately 19 km (12 mi) from the epicenter of the second strongest earthquake to ever occur at a nuclear plant, the Mw 6.6 July 2007 Chūetsu offshore earthquake. This shook the plant beyond design basis and initiated an extended shutdown for inspection, which indicated that greater earthquake-proofing was needed before operation could be resumed. The plant was completely shut down for 21 months following the earthquake. Unit 7 was restarted after seismic upgrades on May 9, 2009, followed later by units 1, 5, and 6. (Units 2, 3, 4 were not restarted).After the April 2011 earthquake, all restarted units were shut down and safety improvements are being carried out. As of May 2015 no units are restarted and no units are expected to restart sooner than the end of 2015.