The 43rd Nordic Seismology Seminar
... to 800 meters. Since 1983 the whole seismic network recorded more than 1,200 seismic events of the energy classes K=4.0-9.5 (magnitude M=0 3), five of them being sizeable. The recorded earthquakes considerably correlate in space and time with the region structural plan which evidently suggests that ...
... to 800 meters. Since 1983 the whole seismic network recorded more than 1,200 seismic events of the energy classes K=4.0-9.5 (magnitude M=0 3), five of them being sizeable. The recorded earthquakes considerably correlate in space and time with the region structural plan which evidently suggests that ...
Seismotectonic modeling of the repeating Katsuhiko Ishibashi
... The Japanese Islands are located in the midst of the plate convergence zone at the northwestern margin of the Pacific Ocean. Two oceanic plates, the Philippine Sea (PHS) and the Pacific (PAC), are converging with two continental plates (Fig. 1(a); e.g., Seno et al., 1993, 1996) (I do not touch on th ...
... The Japanese Islands are located in the midst of the plate convergence zone at the northwestern margin of the Pacific Ocean. Two oceanic plates, the Philippine Sea (PHS) and the Pacific (PAC), are converging with two continental plates (Fig. 1(a); e.g., Seno et al., 1993, 1996) (I do not touch on th ...
Plate Tectonics and Earthquake Potential of Spreading Ridges and
... groups with one of the three principal strain axes approximately vertical, Along mid-ocean ridges the division is particularly neat with 78% strike-slip, 17% normal, 2% thrust, and 3% "other" [Frohlich, 2001]. This is consistent with the theoretical expectation that one of the three principal stress ...
... groups with one of the three principal strain axes approximately vertical, Along mid-ocean ridges the division is particularly neat with 78% strike-slip, 17% normal, 2% thrust, and 3% "other" [Frohlich, 2001]. This is consistent with the theoretical expectation that one of the three principal stress ...
Document
... Tables 1 and 2 show guides that have been developed to help screeners, who may not be engineers, identify common vertical and plan irregularities that can impact the expected seismic performance of the building. Vertical irregularities are further split into moderate and severe categories. An unbrac ...
... Tables 1 and 2 show guides that have been developed to help screeners, who may not be engineers, identify common vertical and plan irregularities that can impact the expected seismic performance of the building. Vertical irregularities are further split into moderate and severe categories. An unbrac ...
Entire paper as a 2 MB file
... the division is particularly neat with 78% strike-slip, 17% normal, 2% thrust, and 3% "other" [Frohlich, 2001]. This is consistent with the theoretical expectation that one of the three principal stress axes should be vertical at shallow depths. Unlike them, we did not create a category labeled "odd ...
... the division is particularly neat with 78% strike-slip, 17% normal, 2% thrust, and 3% "other" [Frohlich, 2001]. This is consistent with the theoretical expectation that one of the three principal stress axes should be vertical at shallow depths. Unlike them, we did not create a category labeled "odd ...
Intricacies of the Himalayan seismotectonics and seismogenesis
... by the detailed study3 based on the scrutiny of the seismotectonics map of the Himalaya and earthquake epicentral location map as characterized over the major portion by a low a-value of 2 (Guttenberg–Richter equation; log N = a – bM), representing the excessive cohesiveness among rock materials. Ho ...
... by the detailed study3 based on the scrutiny of the seismotectonics map of the Himalaya and earthquake epicentral location map as characterized over the major portion by a low a-value of 2 (Guttenberg–Richter equation; log N = a – bM), representing the excessive cohesiveness among rock materials. Ho ...
August 2007
... Craig dePolo described the 1914 Reno earthquakes. On the basis of newspaper accounts of reports by people who felt the earthquake, the sources appeared to be directly under Reno (ground zero). There was a sequence of multiple earthquakes from the months of February through May. The main earthquake w ...
... Craig dePolo described the 1914 Reno earthquakes. On the basis of newspaper accounts of reports by people who felt the earthquake, the sources appeared to be directly under Reno (ground zero). There was a sequence of multiple earthquakes from the months of February through May. The main earthquake w ...
How might infinitesimal strain analysis be used as a
... You may find the document Explanation of Calculator Output and the Strain Ellipse Visualization to be helpful in your interpretation. In order to get the Visualization tool working, download “Wolfram CDF Player” (http://www.wolfram.com/cdf-player/). Once Wolfram is running, open the Strain Ellipse V ...
... You may find the document Explanation of Calculator Output and the Strain Ellipse Visualization to be helpful in your interpretation. In order to get the Visualization tool working, download “Wolfram CDF Player” (http://www.wolfram.com/cdf-player/). Once Wolfram is running, open the Strain Ellipse V ...
How might infinitesimal strain analysis be used as a component of
... Although most of the relative motion between the North America and Juan de Fuca plates is accommodated by the plate boundary fault, active faults in the region (Fig. OP.2) attest to some permanent deformation of the overriding plate. Based on your strain calculations what sort of motion do you expec ...
... Although most of the relative motion between the North America and Juan de Fuca plates is accommodated by the plate boundary fault, active faults in the region (Fig. OP.2) attest to some permanent deformation of the overriding plate. Based on your strain calculations what sort of motion do you expec ...
Seismicity and present-day tectonics of the Svalbard region
... seismograms indicate the relatively high rate of occurrence of small earthquakes in this region, a situation which has allowed us to map seismicity patterns accurately even though recording periods may be of limited duration. Note also the relatively low noise levels even though the gain settings fo ...
... seismograms indicate the relatively high rate of occurrence of small earthquakes in this region, a situation which has allowed us to map seismicity patterns accurately even though recording periods may be of limited duration. Note also the relatively low noise levels even though the gain settings fo ...
Reducing depressive symptoms after the Great East
... tended to be attenuated among survivors who reported suffering more extensive damage to their homes from the earthquake and tsunami. Although the mean change in the GDS score before and after the disaster was only +0.1 among all study participants, 15.3% of those without depressive symptoms (GDS<5) ...
... tended to be attenuated among survivors who reported suffering more extensive damage to their homes from the earthquake and tsunami. Although the mean change in the GDS score before and after the disaster was only +0.1 among all study participants, 15.3% of those without depressive symptoms (GDS<5) ...
Earthquake Analysis of Top Storey Isolated Building using Rubber
... In the base shear forces, the results of the BI building provided 30% reduction in the x direction and 32% reduction in the y direction. Time period affects the earthquake response of the structure, as the time period increases the base shear and acceleration values found to be reducing. In the nonl ...
... In the base shear forces, the results of the BI building provided 30% reduction in the x direction and 32% reduction in the y direction. Time period affects the earthquake response of the structure, as the time period increases the base shear and acceleration values found to be reducing. In the nonl ...
Earthquakes, Existing Buildings and Seismic Design Codes in
... as well as significant economic losses. Among these, Erzincan (1992), Kocaeli (1999) and Duzce (1999) earthquakes were the most severe ones, with magnitudes of 6.9, 7.4 and 7.2, respectively [1–3]. According to a recent investigation, the probability of an earthquake with magnitude 7.0 or greater to ...
... as well as significant economic losses. Among these, Erzincan (1992), Kocaeli (1999) and Duzce (1999) earthquakes were the most severe ones, with magnitudes of 6.9, 7.4 and 7.2, respectively [1–3]. According to a recent investigation, the probability of an earthquake with magnitude 7.0 or greater to ...
Dependence of earthquake recurrence times and independence of
... Keywords: Statistical seismology; Recurrence times; Interevent times; Correlations; Scaling and universality; Renormalization group ...
... Keywords: Statistical seismology; Recurrence times; Interevent times; Correlations; Scaling and universality; Renormalization group ...
Earthquake-prone building policy review regulatory impact statement
... Box 1: The definition of an earthquake-prone building under the Building Act 2004 The Building Act 2004 defines an ‘earthquake-prone’ building as one which would have its ultimate capacity exceeded in a ‘moderate earthquake’ and which would be likely to collapse causing: injury or death to persons ...
... Box 1: The definition of an earthquake-prone building under the Building Act 2004 The Building Act 2004 defines an ‘earthquake-prone’ building as one which would have its ultimate capacity exceeded in a ‘moderate earthquake’ and which would be likely to collapse causing: injury or death to persons ...
10950_2013_9375_MOESM1_ESM
... destructive earthquakes in the past, like the earthquakes of January 2, 1365 (X, EMS); February 3, 1716 (IX, EMS); April 14, 1839 (VIII, EMS); June 18, 1847 (VI, MSK) and November 5, 1924 (VIII, MSK). These events were followed by a long sequence of aftershocks suggesting a high magnitude for the ma ...
... destructive earthquakes in the past, like the earthquakes of January 2, 1365 (X, EMS); February 3, 1716 (IX, EMS); April 14, 1839 (VIII, EMS); June 18, 1847 (VI, MSK) and November 5, 1924 (VIII, MSK). These events were followed by a long sequence of aftershocks suggesting a high magnitude for the ma ...
Anomalous soil radon fluctuations – signal of earthquakes in Nepal
... results associating soil radon anomalies with earthquakes in Alaska as well as in north-eastern United States. In Taiwan, Walia et al. (2005a) and Yang et al. (2005) carried out a study on the variation of radon-222 in sub-soil gas on a continuous basis and obtained encouraging results, which are of ...
... results associating soil radon anomalies with earthquakes in Alaska as well as in north-eastern United States. In Taiwan, Walia et al. (2005a) and Yang et al. (2005) carried out a study on the variation of radon-222 in sub-soil gas on a continuous basis and obtained encouraging results, which are of ...
Aruba Network
... Neotectonic Map (Funvisis) •Pueblo Nuevo Fault on the Peninsula of Paraguana, lying about 50 km south from Aruba, has a seismic potential to generate an earthquake of magnitude 6.6 and a return period of some 2300 years. •Cuiza Fault Nothwestern Venezuela and Northeastern Colombia, some 120 km sout ...
... Neotectonic Map (Funvisis) •Pueblo Nuevo Fault on the Peninsula of Paraguana, lying about 50 km south from Aruba, has a seismic potential to generate an earthquake of magnitude 6.6 and a return period of some 2300 years. •Cuiza Fault Nothwestern Venezuela and Northeastern Colombia, some 120 km sout ...
P from the 2011 Tohoku-Oki earthquake Masatoshi Miyazawa
... than 200 stations including the local sample. The two-sided probability of exceeding the difference of two samples, p, is calculated under the null hypothesis of equal distributions. Figure 6 shows the probability, where the value is the complementary probability, 1 − p, if the difference between th ...
... than 200 stations including the local sample. The two-sided probability of exceeding the difference of two samples, p, is calculated under the null hypothesis of equal distributions. Figure 6 shows the probability, where the value is the complementary probability, 1 − p, if the difference between th ...
User Manual for M8 - Indico
... time and space. The spatial averaging is accomplished by selecting all of the earthquakes in a given CI. The time averaging is accomplished by summing the values over the preceding s years. To count earthquakes we must deal with two important questions: the time interval over which the earthquakes a ...
... time and space. The spatial averaging is accomplished by selecting all of the earthquakes in a given CI. The time averaging is accomplished by summing the values over the preceding s years. To count earthquakes we must deal with two important questions: the time interval over which the earthquakes a ...
Damage estimation of expansion joint by collision between girders
... collision are conducted by the general-purpose dynamic finite element program LSDYNA to clear the damage situation. The following remarks can be made as conclusions of this research. (1)The vertical deformation of the expansion joint is almost same just after the collision regardless of the presence ...
... collision are conducted by the general-purpose dynamic finite element program LSDYNA to clear the damage situation. The following remarks can be made as conclusions of this research. (1)The vertical deformation of the expansion joint is almost same just after the collision regardless of the presence ...
THE 1928 BULGARIAN EARTHQUAKES REVISITED :
... INTRODUCTION On April 14, and 18, 1928, a sequence of two major earthquakes struck the Southern Bulgaria (Richter 1958). Their epicentral area is located near the city of Plovdiv, in the Maritza valley between the Rhodope and the Balkans Mountain belts. This sequence is one of the most important tha ...
... INTRODUCTION On April 14, and 18, 1928, a sequence of two major earthquakes struck the Southern Bulgaria (Richter 1958). Their epicentral area is located near the city of Plovdiv, in the Maritza valley between the Rhodope and the Balkans Mountain belts. This sequence is one of the most important tha ...
The depth effect of earthquakes on tsunami
... the 2013 Sea of Okhotsk tsunami source might achieve nearly 10 cm (the upward slip about 4 cm, the downward slip about 7 cm). The calculation of the tsunami source naturally depends on the generation model and may vary due to input parameters. Okal (private report) used the source model PREM (Prelim ...
... the 2013 Sea of Okhotsk tsunami source might achieve nearly 10 cm (the upward slip about 4 cm, the downward slip about 7 cm). The calculation of the tsunami source naturally depends on the generation model and may vary due to input parameters. Okal (private report) used the source model PREM (Prelim ...
Solutions to Notes for Section 3.3
... Homework- Read section 3.3 Some hints for reading. Read the key concepts closely, look closely at the purple-lined boxes, and then read and try to understand the example chronologically. You can now begin your homework on-line for section 3-3. Logarithmic function-is the kind of function that Revers ...
... Homework- Read section 3.3 Some hints for reading. Read the key concepts closely, look closely at the purple-lined boxes, and then read and try to understand the example chronologically. You can now begin your homework on-line for section 3-3. Logarithmic function-is the kind of function that Revers ...
Earthquake Hazard Zonation of Eastern Arabia
... probabilistic seismic hazard analysis for the regions was performed using the computer code EQRISK [21]. Details of the probabilistic seismic hazard assessment are shown in Abdalla et al. [22]. The input parameters for EQRISK consist of Richter parameters, geometry of source regions, rate of occurre ...
... probabilistic seismic hazard analysis for the regions was performed using the computer code EQRISK [21]. Details of the probabilistic seismic hazard assessment are shown in Abdalla et al. [22]. The input parameters for EQRISK consist of Richter parameters, geometry of source regions, rate of occurre ...
1570 Ferrara earthquake
The 1570 Ferrara earthquake struck the Italian city of Ferrara on November 16 and 17, 1570. After the initial shocks, an earthquake swarm continued for four years, with over 2000 aftershocks concentrated from November 1570 to February 1571.The same area was struck, centuries later, by another major earthquake of comparable intensity.The disaster destroyed half the city, permanently marked many of the buildings left standing, and directly contributed to – but was not the sole cause of – a long-term decline of the city lasting until the 19th century.The earthquake caused the first documented episode of soil liquefaction in the Po Valley, and one of the oldest occurrences of the event known outside of paleoseismology. It led to the establishment of an earthquake observatory which published to very high regard, and the drafting of some of the first-known building designs based on a scientific seismic-resistant approach.