2. the probability of an earthquake with a magnitude greater than six in a year is2%. Determine:A. probability that two earthquakes with magnitude greater than six happen in30 years.

To find the probability of two earthquakes with a magnitude greater than six happening in 30 years,…

Answered: 2. the probability of an earthquake…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Q2
In a seismic hazard analysis, the magnitude of the earthquake (Richter's scale) is modeled with a Type IlI extreme value distribution of the largest value. In a certain geographical region, data have been collected for 50 years, and the annual maximum values of the earthquake magnitude have a mean value of 4.0 and a standard deviation of 2.0. It is estimated that an earthquake with a magnitude of 9.0 or more will devastate the region. What is the probability that the annual maximum magnitude will be greater than or equal to 9.0? 0.001717 0.034344 O 0.003434 O 0.017172
(1) In a hypothetical seismically active region, earthquakes have been recorded over an 80-year period. Part of the record is instrumental, but part is not. Combining all available data, it appears that earthquakes have been distributed as follows: Moment Magnitude (Number of Earthquakes): 3-4 (1800) , 4-5 (150) , 5-6 (11) , >6 (1) a. Estimate the Gutenberg-Richter parameter for the region. b. Neglecting earthquakes of magnitude less than 3, compute the probability that an earthquake in the region will have a moment magnitude between 5.5 and 6.5 c. Repeat Part (b) assuming that paleoseismic evidence indicates that the region is not capable of producing earthquakes of moment magnitude greater than 6.5.
Civil engineering A maximum amplitude of 1.4 m is recorded on Wood-Anderson Seismometer at a standard Richter Station. Describe the expected damage in a city located 150 km from the earthquake epicenter.
4.4 In a hypothetical seismically active region, earthquakes have been recorded over an 80-year period. Part of the record is instrumental, but part is not. Combining all available data, it appears that the earthquakes have been distributed as follows: MOMENT MAGNITUDE 3-4 4-5 5-6 > 6 NUMBER OF EARTHQUAKES ~1800 -150 11 1 (a) Estimate the Gutenberg-Richter parameters for the region. (b) Neglecting earthquakes of magnitude less than 3, compute the probability that an earth- quake in the region will have a moment magnitude between 5.5 and 6.5. (c) Repeat Part(b) assuming that paleoseismic evidence indicates that the region is not capable of producing earthquakes of moment magnitude greater that 6.5.
Historical record of Earthquakes in Pasadena from 1836 to 1961 shows that there were 16 earthquakes with ground intensity in MM-scale of VI or higher. If the occurrence of such high-intensity earthquakes can be assumed to constitute a Poisson process, what is the probability that the next high-intensity earthquake will occur within the next 2 years?
An earthquake was measured by a seismograph 60 kilometers from the epicenter that recorded a maximum of 5.7 × 10^5 µm. Find the magnitude of the earthquake.
An earthquake in Gansu, China, on December 16, 1920, measured 8.6 on the Richter scale and killed 100 000 people. An earthquake that usually causes no damage measures 4 on the Richter scale. Compare the intensities of the two earthquakes. (THE ANSWER IS 40000).
2- Determine the total energy of the 1999s two earthquake's Ms=7.2-November Düzce& M₁=7.4- August 1999 Kocaeli Earthquake in terms of erg. Compare the calculated total energy with the energy of the "1939 Erzincan Earthquake" with a magnitude of Ms=7.9
12.1 Building vibration period is: • The total time that a building vibrates during earthquake The amplitude of the building displacement during vibration • The length of time that a building takes to completes one full cycle of free vibration • The time duration that an earthquake shock wave travels from the base to top of a building
Compare the energy released during the earthquake where ML is equal to 5.5 and the earthquake where ML is equal to 7.5.
An acceleration-time history of an earthquake havirg M-8.5 is shown in Figure 1,25 12 MIS M 115- I 435 41 411 1121314151 11 12 13 14 15 16 17 18 21 21 12 21 14 38 247 28 15 2411113214218 21 38 13 41 41 a. Find the risk of liquefaction for each soil layer (at the mid-point of layers) +6.00 m 0.00 m -10.00 m -18.00 m GWT 교 XXXX fel de bandas de 0.50 m BACKFILL Y,=20.0 kN/m² c=0 kPa and = 38" Y = 18.0 kN/m²³ c=0 kPa and =30* -No.200-5% (FC-5%) N₁18 E=30000 kPa V₁=280 m/s Y-17.0 kN/m² c-50 kPa, c=5 kPa and +=25* C/(1+e)=0.02 C₂/(1+e) = 0.2 PI=24%.N₁=6 E-10000 kPa V-165 m/s UVI SOFT CLAY SILTY SAND Y=21.0 kN/m² WEATHERED ANDESITE 9,=4 MPa V₁=845 m/s

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2. the probability of an earthquake with a magnitude greater than six in a year is 2%. Determine: A. probability that two earthquakes with magnitude greater than six happen in 30 years.