Seismic status in Bangladesh

Rahman, Syed Ajijur; Rahman, Md. Habibur; Faruk, Mohammad Omar; Islam, Md. Sultan-Ul

doi:10.15625/0866-7187/40/2/12266

Cited by 6 publications

(4 citation statements)

References 26 publications

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“…Khan et al (2011) found b values in NE India (24.5-25.2°N and 90-90°E) for zone I, where the b value varies from 0.5-0.7. Likewise, Rahman et al (2018) observed that the b value was within the range of 0.77-1.15. Nevertheless, the variability of the seismicity rate across the whole of India and adjoining areas was observed as the b values in the range of 0.7-0.8 (Kolathayar et al 2012).…”

Section: Discussionmentioning

confidence: 88%

“…Recent studies have revealed almost identical measurements of magnitude of completeness in the studied area. Rahman et al (2018) observed that the estimated M C value was 3.9-4.7 and the overall b value in and around Bangladesh was 0.84. Similarly, Kolathayar et al (2012) found that M C varied from 4.25 to 4.5 for in and around Bangladesh region.…”

Section: Discussionmentioning

confidence: 96%

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An updated earthquake catalog for Bangladesh: an attempt at a seismic risk evaluation

Salman

Nomaan

Saha

2023

geol

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A unique, consistent, and uniform earthquake catalog is crucial for assessing seismic hazards in any locality. This study aims at compiling and processing a better uniform earthquake catalog, using this catalog to identify the probable subduction zone, and assessing seismicity parameters for Bangladesh. The study area is bounded by the geographical limits 16–29°N and 86–96°E. It includes a sum of 48,342 events which are compiled as 1.0 to 8.5 magnitudes (MW) and time period from 1548 to 2020 yrs. Uniformization is made between the body, surface wave, and moment magnitude scales to unify the catalog in terms of MW. For seismic hazard assessment or prediction studies, this catalog comprises earthquake events from Bangladesh and adjoining regions. The assessed MC obtained is around 4.0–5.0, which leads to a, b value varying between 0.71–1.12 and an a value varying between 4.85–7.12. The findings show that the MC is lower at the border of the Chittagong-Sylhet through Hill tracts than the northern part of the area with an MC 4.5–5.0 and a, b value close to 1.00. The results indicate that the study area is a seismically highly active zone in the context of seismicity parameters. Finally, the compiled catalog, seismicity of the area and a probable deformation front are presented and are recommended for use in assessing seismic hazard analysis in Bangladesh.

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Section: Discussionmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 96%

An updated earthquake catalog for Bangladesh: an attempt at a seismic risk evaluation

Salman

Nomaan

Saha

2023

geol

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“…There are seven faults and thirteen lineaments, which might worsen the disaster situation if any earthquake of 4/5 Richter scale occurs in the adjacent area (Ahmad, 2014). The western part of the DCC, from Mirpur-Kallyanpur-Pagla along River Buriganga, and the areas from Uttar Khan-Badda-Demra along the River Balu in the eastern region are the High-Risk Zones of earthquakes (Rahman, et al, 2018, Hussaini, et al, 2015, and Shaha, 2015. The anthropogenic activities such as unplanned land use patterns, depletion and blockage of natural water bodies, violation of geomorphic features, inappropriate industrial waste treatment plants, and other toxic emissions from the vehicles, industries, and brick kilns in the DCC aggravate the magnitude and frequency of geo-environmental disasters.…”

Section: Geo-environmental and Anthropogenic Disastersmentioning

confidence: 99%

Policy Recommendation for Strengthening Capacity for Urban Disaster Management through Open and Distance Learning in Bangladesh

Ahmad

2024

J. Sci. Technol. Res.

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The adverse effects of climate change-induced geo-environmental changes have turned Bangladesh prone to intensifying recurring hazards like- floods, erratic rainfall, landslides, cyclones, storm surges, riverbank erosion, deforestation, droughts, and many more. Earthquake has also been identified as a hazard in Bangladesh. In addition, congested and unhealthy residential areas with high population density, inadequate infrastructural transport and communication facilities, and limited urban disaster management capabilities have been worsening the situation. The main theme of the study was to explore the ways of capacity building of disaster management in Dhaka City Corporation (DCC) through the Open and Distance Learning (ODL) approach offered by the School of Social Sciences, Humanities, and Languages (SSHL), Bangladesh Open University (BOU). The BOU has extensive access to communicate and spread knowledge to its large number of learners within the shortest possible time. Hence, the present research attempted to explore the prospects of the Open and Distance Learning (ODL) approach for strengthening the capacity of urban disaster management through BOU by forming skilled Urban Disaster Volunteer (UDV) teams in different parts of the DCC. Creating and incorporating an Urban Disaster Management (UDM) knowledge pool regarding the hazard and disaster modes, types, seasons, and patterns should be developed to strengthen the Urban Disaster Management Capacity (UDMC). A dynamic cooperation between the national policymakers and local stakeholders has to be accomplished to establish improved awareness through acquiring hazard and disaster-relevant knowledge, and the ability to cope with inevitable disasters.

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“…As a result, there was an error in the estimation of the seismicity parameters by nearly 0.2. A detailed study of the completeness magnitude of Bangladesh done by Rahman et al (2018) showed the contours of 'a' and 'b' values. Later more reliable completeness period of Pakistan using the Stepp (1972) method was done by Waseem (2021) changing bin width of magnitude.…”

Section: Introductionmentioning

confidence: 99%

Seismicity parameters of Nepal by cumulative slope point change method

Khanal

Shrestha

Chhetri

et al. 2023

J. Eng. Iss. Solut.

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Nepal is one of the most seismically active countries with several seismic sources that are capable of generating moderate to high magnitude earthquakes. In this study, earthquake catalogue was developed by considering six major source zones. The completeness time period was determined by performing sensitivity analysis for various magnitude bin widths and time intervals. The seismicity parameters were computed by the least square method (LSM) and maximum likelihood method (MLM). LSM was based on Gutenberg Richter’s scale relationship, whereas for the maximum likelihood method, it was performed by a new method called cumulative slope point change method (CSPCM). The CSPCM was introduced to account the drawbacks of maximum curvature method (MCM), especially for bulk number of data. Furthermore, paper compares the LSM and the MLM for the calculation of seismicity parameters. The comparison shows that the proposed CSPCM based on MLM is reliable in terms of theoretical and analytical way as compared to LSM and MCM.

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Seismic status in Bangladesh

Cited by 6 publications

References 26 publications

An updated earthquake catalog for Bangladesh: an attempt at a seismic risk evaluation

An updated earthquake catalog for Bangladesh: an attempt at a seismic risk evaluation

Policy Recommendation for Strengthening Capacity for Urban Disaster Management through Open and Distance Learning in Bangladesh

Seismicity parameters of Nepal by cumulative slope point change method

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