Activity of Dauki Fault during the 1897 Ms 8.0 Great Assam earthquake confirmed by trench investigation at Gabrakahri Village, Haluaghat, Mymensingh, Bangladesh

Morino, Michio; Kamal, A. S. M. Maksud; Muslim, Dicky; Ali, Reshad Md. Ekram; Kamal, Mohammad Ashraful; Kaneko, Fumio

doi:10.5575/geosoc.115.6.xi_xii

Cited by 5 publications

(4 citation statements)

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“…3). Morino et al (2009) suggested that units B to F were warped by the activity of the Dauki Fault during the 1897 earthquake and sand dikes due to paleo-liquefaction intruded at the same time. However, the flexure of units B to F is too small in comparison with the wide deformation of terrace surface (Figs.…”

Section: Time Of Seismic Events Identified In the Trenchmentioning

confidence: 98%

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Seismic event of the Dauki Fault in 16th century confirmed by trench investigation at Gabrakhari Village, Haluaghat, Mymensingh, Bangladesh

Morino¹,

Kamal²,

Muslim

et al. 2011

Journal of Asian Earth Sciences

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Section: Time Of Seismic Events Identified In the Trenchmentioning

confidence: 98%

“…We carried out the field survey at further east located within Bangladesh, and confirmed back-tilting terrace surfaces at Gabrakhari Village ( Fig. 2b and c; Morino et al, 2009).…”

Section: Geomorphology In and Around Gabrakhari Villagementioning

confidence: 99%

Seismic event of the Dauki Fault in 16th century confirmed by trench investigation at Gabrakhari Village, Haluaghat, Mymensingh, Bangladesh

Morino¹,

Kamal²,

Muslim

et al. 2011

Journal of Asian Earth Sciences

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“…Figure 1 shows the position of Dauki fault with surrounding tectonic details. Morino et al [30][31][32] first identified the active Dauki fault in the trench at Gabrakhari village, where their study displayed the rupture of Dauki fault commencing in AD 1548. The historical seismic event of AD 1500-1630 occurred in this Gabrakhari trench site, on the western part of the Dauki fault.…”

Section: The Geotectonic and Seismicity Of Sylhet Regionmentioning

confidence: 99%

A study on b-value and investigation of seismic hazard in Sylhet seismic region, Bangladesh using Gumbel’s extreme value distribution method

et al. 2019

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In Gutenberg-Richter (GR) earthquake frequency magnitude relationship the b-value plays an important role and is required for the seismic hazard analysis of any region. In this study, both the Gumbel's extreme distribution and the GR methods are used to estimate the b-value for Sylhet region of Bangladesh. Due to the geological location this region is the most seismically vulnerable area of the country. Sylhet region is situated on the south eastern part of the Dauki fault. The frequency of seismic activity at the Dauki fault zone has lessened after the great Indian earthquake that occurred in 1897. Therefore, energy may be stored in this fault region, which leaves possibilities that Sylhet may encounter an earthquake. The Sylhet region has experienced nearly 184 earthquakes of magnitude ranging from 4 to 7.2 during the last 101 years. In this study, the probability of recurrence of earthquakes of various magnitude has also been investigated using USGS catalogue which has been prepared by taking moment magnitude (M w ) as a homogenous magnitude. The least square regression method has been applied to compute the b-value by the GR relationship, which resulted in the b-value to be 0.75. Nevertheless, the regression analysis through Gumbel's extreme value displays a satisfactory result. Further the regression analysis through Gumbel's method estimated the b-value to be 0.91 and using this the earthquake recurrence probability and the return period for different magnitudes have been calculated. From the probabilistic analysis it has been found that the probability of recurrence of an earthquake (R) of M w ≥ 6.5 in 100 years is 85% and its return period (Tr) is 53 years in this region. The earthquake recurrence probability of significant damaging earthquakes affecting Sylhet and their return periods have also been investigated. It has been observed that the probability of recurrence of an earthquake equal or greater than 1885 Bengal earthquake (M w ≥ 7.0) in 100 years is 48.5% in this region and its return period (Tr) is 151 years.

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“…However, previous studies suggested that the Dauki fault has not ruptured in the historical past (Chen and Molnar, 1990;Kayal, 2001;Rajendran et al, 2004), although no tectonic geomorphological or paleo-seismological surveys were performed. Morino et al (2009Morino et al ( , 2011 first identified the active Dauki fault in the trench at Gabrakhari Village and suggested that the Dauki fault ruptured in AD 1548, though it was a small secondary fault that had branched off from the main fault. The 1548 earthquake, which is the first large earthquake recorded in Bangladesh, shook both Sylhet and Chittagong (http://www.banglapedia.org/HT/ E_0002.HTM, last accessed on 18 December 2013).…”

Section: Introductionmentioning

confidence: 98%

A paleo-seismological study of the Dauki fault at Jaflong, Sylhet, Bangladesh: Historical seismic events and an attempted rupture segmentation model

Morino¹,

Kamal

Akhter

et al. 2014

Journal of Asian Earth Sciences

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Activity of Dauki Fault during the 1897 Ms 8.0 Great Assam earthquake confirmed by trench investigation at Gabrakahri Village, Haluaghat, Mymensingh, Bangladesh

Cited by 5 publications

References 1 publication

Seismic event of the Dauki Fault in 16th century confirmed by trench investigation at Gabrakhari Village, Haluaghat, Mymensingh, Bangladesh

Seismic event of the Dauki Fault in 16th century confirmed by trench investigation at Gabrakhari Village, Haluaghat, Mymensingh, Bangladesh

A study on b-value and investigation of seismic hazard in Sylhet seismic region, Bangladesh using Gumbel’s extreme value distribution method

A paleo-seismological study of the Dauki fault at Jaflong, Sylhet, Bangladesh: Historical seismic events and an attempted rupture segmentation model

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