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Earthquake is one of the most dreadful natural disasters that causes huge amount
of destruction of the properties and human lives. That is why, researchers are
attempting to find out best model to explain and predict the pattern of
earthquake so that the losses of lives and wealth can be minimized. In this
paper, a statistical analysis of the earth...
Context in source publication
Context 1
... all the 452 earthquake history in Bangladesh recorded from 1918 to 2016, it reveals that the most of the earthquakes that occurred are of magnitude level 4.0 to 4.9; which has been declared as 'light' earthquake by the Bangladesh Meteorological Department (BMD). Figure 1 shows that the occurrence of earthquake is very common and frequent in Bangladesh which is not as much devastating as those of level 6 and above. Still this might be a significant warning for our country as the occurrences of earthquakes in Bangladesh have dramatically been increased in the last decade compared to the early 90's that are shown in figure 2. It also indicates that some considerable changes in the geographical structures and seismic patterns might have taken place in this region; which is responsible for the frequent occurrences of earthquakes. ...
Citations
The study performs a temporal probabilistic analysis of earthquakes in a seismically active region like Bangladesh. Data from the USGS earthquake catalog, spanning from May 12, 1906, to August 24, 2022, within a 500km radius of Dhaka City, was analyzed to assess earthquake hazard and probability. It revealed that the country is located in an area with a high likelihood of earthquakes, and any moderate to major tremor might trigger an enormous human catastrophe. While 75% of the earthquakes were classified as the "light" category (4-4.9 Richter Scale), 64% occurred at shallow depths, and only 5% occurred within 200 kilometers of Dhaka. Since the 1990s, the earthquake frequency has increased significantly with an incidence rate of 1.556. The findings categorized the research area as having a relatively moderate risk of earthquake hazard, with depth, frequency, magnitude, and distance scores falling into various risk categories. Probability distributions of earthquake magnitudes were estimated using the graphical analysis and goodness-of-fit criteria. Cumulative probability distributions were also determined to predict earthquake occurrences of specific magnitudes in the coming years based on recurrence time. The study indicated a strong probability of major earthquakes in the future, which poses a severe threat to the country. Assessing the susceptibility of an area to earthquakes based on factors like geology, topography, population density, building quality, and coping mechanisms is crucial, and this earthquake catalog can support disaster preparedness, specific precautions in planning, and the development of a resilient nation.
