Distribution of Earthquake Magnitude Levels in Bangladesh

Rahman, Md. Habibur

doi:10.5539/jgg.v11n3p15

Cited by 1 publication

(1 citation statement)

References 30 publications

(20 reference statements)

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“…Moreover, the pdf of log-normal distribution conveyed that there is an 80.18% of chance to occur an earthquake having a magnitude of about 4.5 on the Richter Scale. The results are also consistent with the ndings reported by Rahman and Hossain (2019). The outcomes of all other distributions showed almost similar ndings according to CDF except the Gumbel distribution (65.46%) (Fig.…”

Section: Probability Of Earthquake In Bangladeshsupporting

confidence: 92%

Recent Tremors in Bangladesh Might Hint at Bigger Quakes: A Probabilistic Approach for Earthquake Prediction

Ahmed,

Ali,

Mahmud

et al. 2023

Preprint

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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.

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Section: Probability Of Earthquake In Bangladeshsupporting

confidence: 92%