seismic activity, Yangtze River – Yellow Sea seismic belt, trend
... each seismic period, their seismicity level, and similarities and differences among the seismic activities in different periods; (b) characteristics of the spatial distribution of different seismic periods; (c) correlations (especially the sequential relationship) among seismic activities in differe ...
... each seismic period, their seismicity level, and similarities and differences among the seismic activities in different periods; (b) characteristics of the spatial distribution of different seismic periods; (c) correlations (especially the sequential relationship) among seismic activities in differe ...
chapter 3 - Geophile.net
... 12. Why do the floor or deck beams of parking garages and bridges sometimes fail and fall during an earthquake? * The ends of the beams rest loosely on ledges to permit heat expansion. Flexing of the support posts can pull the beams off their ledges. 13. Where a tall building is right next to a sho ...
... 12. Why do the floor or deck beams of parking garages and bridges sometimes fail and fall during an earthquake? * The ends of the beams rest loosely on ledges to permit heat expansion. Flexing of the support posts can pull the beams off their ledges. 13. Where a tall building is right next to a sho ...
From seismic noise to ocean wave parameters
... obtained correlations higher than 0.85 for 4-hourly seismic data over the entire year. Schimmel et al. [2011] also independently verified the location of the sources with the measured polarization directions of Rayleigh waves. This model may thus be used to guide the interpretation of seismic noise ...
... obtained correlations higher than 0.85 for 4-hourly seismic data over the entire year. Schimmel et al. [2011] also independently verified the location of the sources with the measured polarization directions of Rayleigh waves. This model may thus be used to guide the interpretation of seismic noise ...
Research on the Seismic Activity of the Lower Yangtze River
... Accumulative annual mean occurrence rate of earthquake and statistical b value in different periods in the Lower Yangtze River-South Yellow Sea Seismic Zone The V 4 value,the annual mean occurrence rate of earthquakes with magnitudes more than 4. 0,represents the seismic activity level in a certain ...
... Accumulative annual mean occurrence rate of earthquake and statistical b value in different periods in the Lower Yangtze River-South Yellow Sea Seismic Zone The V 4 value,the annual mean occurrence rate of earthquakes with magnitudes more than 4. 0,represents the seismic activity level in a certain ...
Shallow inland earthquakes in NE Japan possibly triggered
... (>60◦ ) and NE-SW oriented P-axes. Their dip angle is greater than the lock-up angle for pure reverse faults under the usual stress field with the WNW-ESE directed and horizontal maximum compressional stress axis (σ1 ) in NE Japan (Sibson, 1990, 2009). A reduction of normal stress may have triggered ...
... (>60◦ ) and NE-SW oriented P-axes. Their dip angle is greater than the lock-up angle for pure reverse faults under the usual stress field with the WNW-ESE directed and horizontal maximum compressional stress axis (σ1 ) in NE Japan (Sibson, 1990, 2009). A reduction of normal stress may have triggered ...
Ocean wave sources of seismic noise
... Synthetic and observed seismic spectra are well correlated (r > 0.85). On the basis of the model results, noise generation events can be clustered in three broad classes: wind waves with a broad directional spectrum (class I), sea states with a significant contribution of coastal reflections (class ...
... Synthetic and observed seismic spectra are well correlated (r > 0.85). On the basis of the model results, noise generation events can be clustered in three broad classes: wind waves with a broad directional spectrum (class I), sea states with a significant contribution of coastal reflections (class ...
Chapter 14
... the floor beneath so that the swinging pendulum will knock them down as the floor rotates. At the north pole, this apparent rotation would be 15°/h. 䉳 ...
... the floor beneath so that the swinging pendulum will knock them down as the floor rotates. At the north pole, this apparent rotation would be 15°/h. 䉳 ...
Improvement of Methods for Earthquake
... Arias intensity and Newmark’s displacement. For Newmark’s displacement, this approach is based on physical analysis and has been applied to assess single slope stability. But when facing a wide region, this method becomes impracticable because it needs sufficient underground information, such as roc ...
... Arias intensity and Newmark’s displacement. For Newmark’s displacement, this approach is based on physical analysis and has been applied to assess single slope stability. But when facing a wide region, this method becomes impracticable because it needs sufficient underground information, such as roc ...
A rare great earthquake on an oceanic fossil
... earthquake initiated in crust that was formed around 30 Ma. A number of fracture zones have been identified in the area (Massel et al. 2000; Keller 2004) and these bend sharply from being orthogonal to, to being nearly tangential to, the modern plate boundary as the fracture zone approaches the plat ...
... earthquake initiated in crust that was formed around 30 Ma. A number of fracture zones have been identified in the area (Massel et al. 2000; Keller 2004) and these bend sharply from being orthogonal to, to being nearly tangential to, the modern plate boundary as the fracture zone approaches the plat ...
Depth-varying rupture properties of subduction zone megathrust faults
... and Bilek, 2007; Heuret et al., 2011]. As frictional sliding behavior is plausibly influenced by all of these fault zone properties, observations of depth-varying earthquake phenomena along the megathrust are not surprising [Marone and Scholz, 1988; Scholz, 1998; Bilek, 2007; Wang and He, 2008]; how ...
... and Bilek, 2007; Heuret et al., 2011]. As frictional sliding behavior is plausibly influenced by all of these fault zone properties, observations of depth-varying earthquake phenomena along the megathrust are not surprising [Marone and Scholz, 1988; Scholz, 1998; Bilek, 2007; Wang and He, 2008]; how ...
Tohoku Chapter, Architectural Institute of Japan Quick
... washed away and destroyed by tsunami attacks. They and their families are living in shelters. The tsunami wave height reached as high as 3 to 4 m in Yamamoto-machi. Damage of houses was very light in the areas where tsunami waves did not reach. ...
... washed away and destroyed by tsunami attacks. They and their families are living in shelters. The tsunami wave height reached as high as 3 to 4 m in Yamamoto-machi. Damage of houses was very light in the areas where tsunami waves did not reach. ...
Wave energy converters, sediment transport and coastal erosion
... where sediment removed from a beach by regular winter storms is mainly deposited in the near shore region from where it is pushed back up onto the beach by the swells of a longer wavelength during the summer period [4]. Where in mesoscale areas with a rich supply of sediment, a localised net loss of ...
... where sediment removed from a beach by regular winter storms is mainly deposited in the near shore region from where it is pushed back up onto the beach by the swells of a longer wavelength during the summer period [4]. Where in mesoscale areas with a rich supply of sediment, a localised net loss of ...
Notes on the earthquake of September 15, 1972
... The shaking of the ground or a building during an earthquake depends not only on the nature of the earthquake waves being received, but also on the nature of the receiver. Wave motion of any kind can be transmitted in any system in three ways by reflection, by perfect transmission, and by absorption ...
... The shaking of the ground or a building during an earthquake depends not only on the nature of the earthquake waves being received, but also on the nature of the receiver. Wave motion of any kind can be transmitted in any system in three ways by reflection, by perfect transmission, and by absorption ...
Episodic Tremor and Slip
... Episodic tremor and slip (ETS) represents a newly discovered mode of fault behavior occurring just below the locked zone that generates great earthquakes. Initially discovered in subduction zones, this new slip mechanism can release energy equivalent to at least a magnitude 7 earthquake! While this ...
... Episodic tremor and slip (ETS) represents a newly discovered mode of fault behavior occurring just below the locked zone that generates great earthquakes. Initially discovered in subduction zones, this new slip mechanism can release energy equivalent to at least a magnitude 7 earthquake! While this ...
Different approaches to model the nearshore circulation in the south
... solve the 3-D circulation. This is particularly important for the wave-induced mixing and the surf zone circulation. Lane et al. (2007) and Uchiyama et al. (2010) showed that the radiation stress approach used in the Delft3D system does not properly decompose the wave effects, and it obscures their ...
... solve the 3-D circulation. This is particularly important for the wave-induced mixing and the surf zone circulation. Lane et al. (2007) and Uchiyama et al. (2010) showed that the radiation stress approach used in the Delft3D system does not properly decompose the wave effects, and it obscures their ...
Plate-wide deformation before the Sumatra
... We use earthquake locations from the Iceland Meteorological Office (IMO) Seismic Bulletin. It is difficult to provide statistical errors for SWS measurements that are meaningful in geophysics. The vertical lines in the plots of normalised time-delays in Figure 1 are the observed time-delays (in ms) ...
... We use earthquake locations from the Iceland Meteorological Office (IMO) Seismic Bulletin. It is difficult to provide statistical errors for SWS measurements that are meaningful in geophysics. The vertical lines in the plots of normalised time-delays in Figure 1 are the observed time-delays (in ms) ...
MS Word Technical Paper Template - PBD-III
... estimate the likely amount of seismic displacement and a pseudostatic slope stability procedure that estimates a seismic pseudostatic coefficient that is dependent on key factors, including the seismic hazard. The proposed procedures are applied to two sites in the United States. Under the first fra ...
... estimate the likely amount of seismic displacement and a pseudostatic slope stability procedure that estimates a seismic pseudostatic coefficient that is dependent on key factors, including the seismic hazard. The proposed procedures are applied to two sites in the United States. Under the first fra ...
Stories in IPRC Climate
... shoreline far out in the bay. Then many get caught up in the rip current, which is so strong that it pushes the bottles against the wind beyond the reef. Will they drift further out to sea and join the subtropical gyre circulation and the Great Pacific Garbage Patch? After a while the bottles appear ...
... shoreline far out in the bay. Then many get caught up in the rip current, which is so strong that it pushes the bottles against the wind beyond the reef. Will they drift further out to sea and join the subtropical gyre circulation and the Great Pacific Garbage Patch? After a while the bottles appear ...
Determination of seismic wave attenuation: A Review
... presence of heterogeneities in the wave propagation medium. As the seismic wave passes through a medium, it interacts with the medium heterogeneities and the wave energy gets redistributed causing attenuation due to multiple reflections within that medium. On the other hand, intrinsic attenuation oc ...
... presence of heterogeneities in the wave propagation medium. As the seismic wave passes through a medium, it interacts with the medium heterogeneities and the wave energy gets redistributed causing attenuation due to multiple reflections within that medium. On the other hand, intrinsic attenuation oc ...
Where Are Earthquakes Happening Right Now? Worksheet
... Example answer: A fault is a crack in the Earth’s crust, resulting from the displacement of one side with respect to the other. Large faults form from the result of plate tectonic forces. Only active faults cause earthquakes and many faults are inactive. b. Why do you think earthquakes are located a ...
... Example answer: A fault is a crack in the Earth’s crust, resulting from the displacement of one side with respect to the other. Large faults form from the result of plate tectonic forces. Only active faults cause earthquakes and many faults are inactive. b. Why do you think earthquakes are located a ...
Seismic interaction and delayed triggering along the North Anatolian
... central sections of the NAF as a function of time and longitude with corresponding map. The major clusters (black triangles) and the epicenters of the largest earthquakes (blue) are identified. The main strand of the NAF is in yellow. The 1999 ruptures are in red. The 1943 rupture is in orange. with ...
... central sections of the NAF as a function of time and longitude with corresponding map. The major clusters (black triangles) and the epicenters of the largest earthquakes (blue) are identified. The main strand of the NAF is in yellow. The 1999 ruptures are in red. The 1943 rupture is in orange. with ...
corrected _ earthqua.. - Indian Tsunami Early Warning System
... Earthquake is a sudden shaking of ground due to natural causes (rock displacements, landslide, avalanche, volacanic eruption, meteoritic impact, sub-marine sea faulting, etc) so to refer it as natural earthquake. The shaking of ground may be due to several other man-made agencies, such as, explosion ...
... Earthquake is a sudden shaking of ground due to natural causes (rock displacements, landslide, avalanche, volacanic eruption, meteoritic impact, sub-marine sea faulting, etc) so to refer it as natural earthquake. The shaking of ground may be due to several other man-made agencies, such as, explosion ...
seismic response of buried pipelines to surface wave propagation
... Soil-structure interaction triggered by seismic waves has an important effect on buried pipeline behavior, and when integrated over an entire network of pipelines, on system performance (O’Rourke, et al. 2004a). In general, there are two types of seismic waves, body and surface waves. Compared with ...
... Soil-structure interaction triggered by seismic waves has an important effect on buried pipeline behavior, and when integrated over an entire network of pipelines, on system performance (O’Rourke, et al. 2004a). In general, there are two types of seismic waves, body and surface waves. Compared with ...
Geological Survey of Denmark and Greenland Bulletin 31
... One occurred on the island of Disko in August 2010, the other one was active from January 2008 to June 2009 near the South-East Greenland coast c. 200 km south of Tasiilaq. An earthquake swarm is defined as a series of earthquakes of similar magnitude located within a small area. The magnitude of th ...
... One occurred on the island of Disko in August 2010, the other one was active from January 2008 to June 2009 near the South-East Greenland coast c. 200 km south of Tasiilaq. An earthquake swarm is defined as a series of earthquakes of similar magnitude located within a small area. The magnitude of th ...
On rotational water waves with surface tension
... and k 1 giving the same ‘eigenspeed’ cKU . In principle, there exist periodic waves of minimal period 2p/k for every speed given by the above dispersion relation. The only restriction being that we have not proved the existence of waves of minimal period 2p/k 1 when k 0Znk 1 for some n2Z. The dispe ...
... and k 1 giving the same ‘eigenspeed’ cKU . In principle, there exist periodic waves of minimal period 2p/k for every speed given by the above dispersion relation. The only restriction being that we have not proved the existence of waves of minimal period 2p/k 1 when k 0Znk 1 for some n2Z. The dispe ...
Tsunami
A tsunami (plural: tsunamis or tsunami; from Japanese: 津波, lit. ""harbor wave"";English pronunciation: /tsuːˈnɑːmi/), also known as a seismic sea wave, is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater explosions (including detonations of underwater nuclear devices), landslides, glacier calvings, meteorite impacts and other disturbances above or below water all have the potential to generate a tsunami. In being generated by the displacement of water, a tsunami contrasts both with a normal ocean wave generated by wind and with tides, which are generated by the gravitational pull of the Moon and the Sun on bodies of water.Tsunami waves do not resemble normal sea waves, because their wavelength is far longer. Rather than appearing as a breaking wave, a tsunami may instead initially resemble a rapidly rising tide, and for this reason they are often referred to as tidal waves, although this usage is not favored by the scientific community because tsunamis are not tidal in nature. Tsunamis generally consist of a series of waves with periods ranging from minutes to hours, arriving in a so-called ""wave train"". Wave heights of tens of meters can be generated by large events. Although the impact of tsunamis is limited to coastal areas, their destructive power can be enormous and they can affect entire ocean basins; the 2004 Indian Ocean tsunami was among the deadliest natural disasters in human history with at least 230,000 people killed or missing in 14 countries bordering the Indian Ocean.The Greek historian Thucydides suggested in his late-5th century BC History of the Peloponnesian War, that tsunamis were related to submarine earthquakes, but the understanding of a tsunami's nature remained slim until the 20th century and much remains unknown. Major areas of current research include trying to determine why some large earthquakes do not generate tsunamis while other smaller ones do; trying to accurately forecast the passage of tsunamis across the oceans; and also to forecast how tsunami waves would interact with specific shorelines.