Seismic hazard analysis of Lucknow considering local and active seismic gaps (original) (raw)

SEISMIC HAZARD ASSESSMENT OF UTTAR PRADESH LOCAL AND ACTIVE SEISMIC GAPS

International Journal of Engineering Applied Sciences and Technology, 2020 Vol. 4, Issue 11, ISSN No. 2455-2143, 2020

The Himalayas are the one of the most active seismic regions over in wide world. From where some of the devastating earthquake were originated; Bihar Nepal 1803, shilling 1897, Kangra 1905, Bihar Nepal 1934, Assam 1950, Sikkim 2011, Nepal Earthquake 2015 and last earthquake in Uttar Pradesh was October 18th 2007 in Gautam Buddha Nagar. Many of the research Analyser highlighted the central Seismic Gap based on the stress accumulation in the central region of the Himalaya, The regions which were situated adjacent to the active Himalayan regions having large possibility of seismic hazard. In this study, there is an assessment of spectral acceleration of Uttar Pradesh which were based upon the Probabilistic Seismic Hazard Analysis (PSHA). In past few Decades the population of the Uttar Pradesh is drastically increased is Approximately 16,61,98000 According to 2001 census. The comprehensive earthquake catalogue were compiled from various sources for region 23°52’ N and 30° 25’ N latitudes and 77°.3’ and 84°.39’E longitude that comprises the historic and prehistoric events. The seismic parameter has been estimated with the use of past data of control regions A seismic hazard map of Uttar Pradesh has been developed considering the region-specific seismotectonic parameters with a radius of 500 km by probabilistic approaches. The updated maximum probable earthquake magnitude (M max) for each seismic sources has been done by considering the regional rupture characteristic method and compared with the maximum magnitude observed. (Mobs max), Mobs max + 0.5 and Kijo Method. The best suitable Ground motion prediction equations (GMPE) were selected from 27 applicable GMPE’s based on the ‘Efficacy Test’. Wherever, Maximum expected magnitude (Mmax) low seismicity area like Uttar Pradesh based on Gutenberg-Richter Relationship. The recurrence relationship has been obtained using Guttenberg-Richter (G-R) relationship. The probabilistic seismic hazard analysis were then carried out considering well known seismogenic sources of Uttar Pradesh. The result of above investigation presented In the form of Peak Ground Acceleration ‘PGA’ and response Spectra.

A Revisit to Seismic Hazard at Uttarakhand

International Journal of Geotechnical Earthquake Engineering, 2015

This paper presents the seismic hazard of the state of Uttarakhand in India, located at the foothills of the seismically active Himalayan mountain ranges. In the present study, an updated catalog of earthquakes has been prepared for Uttarakhand which was homogenized into a unified moment magnitude scale after declustering of the catalog to remove aftershocks and foreshocks. Various source zones were identified in the study area to account for local variability in seismicity characteristics. The seismicity parameters were estimated for each of these source zones, which are necessary inputs into seismic hazard estimation of a region. The seismic hazard evaluation of the region based on a state-of-the art PSHA study was performed using the classical Cornell–McGuire approach with different source models and attenuation relations. The most recent knowledge of seismic activity in the region was used to evaluate the hazard, incorporating uncertainty associated with different modeling param...

The assessment of seismic hazard in two seismically active regions in Himalayas using deterministic approach

2008

The long stretch of Himalaya is often visited by many major earthquakes from time to time. The work presented in this paper shows the seismic hazard in the northeast Himalayas and the Uttarakhand Himalayas, India. Seismic hazard estimation in these regions is based on the technique given by . In this work, the finite rupture along the lineament has been modeled using the semi empirical technique proposed by and further modified by . The modeling procedure follows the ω 2 scaling laws, directivity effects and other strong motion properties.

A Seismic Hazard Assessment of North Chhattisgarh (India)

IntechOpen eBooks, 2023

Chhattisgarh, located in Central India, has been carved out of Madhya Pradesh to become the 26th state of the Indian Union. North Chhattisgarh is addressed by the tribal population. In the current study, an endeavor has been made to carry out the seismic hazard analysis for the major district headquarters of north Chhattisgarh, considering the local site effects and developing a seismic zone map for north Chhattisgarh. Seismic hazard analysis has been done for major district headquarters Ambikapur, Baikunthpur [Koria], Korba, and Jashpurnagar of north Chhattisgarh, using seismotectonic information. All earthquake sources and past seismic events have been considered within a radius of 300 km for the headquarters, applying deterministic and probabilistic seismic hazard analysis approaches. The seismic parameters and peak ground acceleration at the bedrock level for the district headquarters of north Chhattisgarh have been estimated. Using probabilistic seismic hazard analysis, hazard curves have been developed for each district headquarters. Alternatively, for peak ground acceleration of 0.05 g, 0.1 g, and 0.15 g return periods have been estimated for the study area. The probabilities of exceedance for 2% and 10% for 50 years have also been estimated for the study area. The current study throws light on the design and construction of vital civil engineering structures near and around the seismically active headquarters in northern Chhattisgarh.

Regional-Local Hybrid Seismic Hazard and Disaster Modeling of Five Tectonic Province Ensemble from Westcentral Himalaya to Northeast India with focus on Amritsar, Agra, Kolkata, Dhaka, Guwahati, and Gangtok city

Sitharam T., Jakka R., Kolathayar S. (eds) Latest Developments in Geotechnical Earthquake Engineering and Soil Dynamics, Springer Transactions in Civil and Environmental Engineering, Springer, Singapore, 2021

Seismic Risk Map of the Indian Subcontinent presented here places the tectonic ensemble of Westcentral Himalaya, Indo-Gangetic Foredeep, Bengal Basin, Darjeeling-Sikkim Himalaya upto Northeast India including Bhutan in ‘High’ to ‘Severe’ Risk thus rendering it a model case study for site-specific seismic hazard study based on an enriched surface and in-situ downhole Geotechnical and Geophysical database of with a new regional fifth degree nonlinear power law polynomial combining shear wave velocity with Geology, Geomorphology, Landform and Topography, a set of new lithology-based depth-dependent SPT-N value derived/in-situ downhole seismic measurement yielded shear wave velocity categorizing the region into Site Classes E, D4, D3, D2, D1, C4, C3, C2, C1, B and A with spectral amplifications 5.8, 4.8, 4.2, 3.9, 3.3, 2.58, 2.2, 1.87, 1.81, 1.3 and 1.0 respectively at the predominant frequency varying between 1.41 to 8.5 Hz as envisaged through nonlinear soil-structure interaction modeling which is seen to influence the surface consistent PGA and PSA significantly with multifold enhanced design response spectra of the region and also brought in focus the issues of induced seismic catastrophe in terms of liquefaction hazard evidenced in the city of Amritsar, Agra, Kolkata, Dhaka, Guwahati, and landslide in Gangtok presented here. In order to understand the implications of this seismic hazard its impact is quantified through SELENA-based building damage and casualty assessment in the city of Amritsar, Kolkata, Dhaka, Gangtok and Guwahati thus providing a unique seismic hazard-disaster model to be put in place for pre-disaster preparedness through updated urban bye-laws and post-disaster mitigation.

Deterministic Seismic Hazard Analysis of " GORAKHPUR " Region

Many earthquakes have been knowledgeable in Indian peninsular shield, which was previously treated to be seismically steady. Seismic risk assessment refers to an evaluation of ground motion parameters at a particular area by considering some past earthquake evidence. In the current study seismic risk assessment is performed for the " Gorakhpur " city. It is a highly seismic prone area. It comes under zone IV. The manuscript presents the resolve of peak ground acceleration (PGA) and maximum credible earthquake (MCE). MCE has been dogged by taking into account the local seismotectonic movement in a propos 350 km radius about Gorakhpur city. The seismic risk in provisions of peak horizontal acceleration was estimated to be 0.312g using attenuation model by " Sharma " (2000) and 0.032g using attenuation model by " Iyenger and Raghukanth " (2004). The calculated peak horizontal acceleration in the nearby reading is in verification with the observed values of Nepal earthquakes and is furthermore similar to standards reported in additional studies.

Probabilistic seismic hazard assessment of NW and central Himalayas and the adjoining region

Journal of Earth System Science, 2015

The Himalayan region has undergone significant development and to ensure safe and secure progress in such a seismically vulnerable region there is a need for hazard assessment. For seismic hazard assessment, it is important to assess the quality, consistency, and homogeneity of the seismicity data collected from different sources. In the present study, an improved magnitude conversion technique has been used to convert different magnitude scales to moment magnitude scale. The study area and its adjoining region have been divided into 22 seismogenic zones based upon the geology, tectonics, and seismicity including source mechanism relevant to the region. Region specific attenuation equations have been used for seismic hazard assessment. Standard procedure for PSHA has been adopted for this study and peak ground motion is estimated for 10% and 2% probability of exceedance in 50 years at the bed rock level. For the 10% and 2% probability of exceedance in 50 years, the PGA values vary from 0.06 to 0.36 g and 0.11 to 0.65 g, respectively considering varying b-value. Higher PGA values are observed in the southeast part region situated around Kaurik Fault System (KFS) and western parts of Nepal. Management Authority (NDMA 2011), Government of India, presented various probabilistic seismic

Seismic hazard assessment of eastern Nepal using 1934 and 1988 earthquakes

Journal of Nepal Geological Society, 2011

The Himalayan arc is widely considered as one of the hot spots in terms of earthquake disaster. Nepal, which is centrally located in the Himalayan region, has witnessed many medium to large earthquakes in the past, e.g., 1934 Bihar-Nepal earthquake, 19 88 Udayapur earthquake. Because of lack of income resources in rural area, considerable number of population has already migrated to the major urban areas of the country and the trend is still continued. With such population pressure and also economic constrains, major part of population is residing in weak and non-engineered structures of the unplanned urban areas. Consequently, it has put large population at high risk of earthquake disaster. It is, therefore, necessary to assess the seismic hazard so that proper mitigation measures may be adopted for the safeguard of the population, property and infrastructures under risk. In this contribution, preliminary Probabilistic Seismic Hazard Analysis (PSHA) for eastern Nepal is carried out...

Earthquake Hazard Assessment of Peninsular India

This paper presents the detailed seismic hazard assessment of the peninsular India (lat. 8°-28°N and long. 67.5°-90°E) which is considered to be seismically most stable landmasses of the Indian plate. Past seismic history in this region (Koyna, 10

Seismic Hazard Assessment of Kashmir and Kangra valley region, western Himalaya, India

Geomatics, Natural Hazards and Risk, 2013

A complete earthquake catalogue of the Western Himalaya (latitudes 30 N-36 N and longitudes 72 E-78 E) for the period of 1501-2010 has been compiled with earthquake magnitude computed in moment magnitude (Mw) scale. Pre-and early twentieth century records of earthquake damage have been documented from rare and out of print publications. Seismotectonics and seismic hazard for Kohistan arc, Kashmir-Hazara Syntaxis, Nanga-Parbat (Western Syntaxis), Karakoram and Himachal Himalaya are discussed with special reference to 1905 Kangra and 2005 Muzaffarabad earthquakes. Analyses of spatio-temporal variation in b-value from the region indicate significant precursor prior to the 2005 Muzaffarabad earthquake; progressive rise of background b-value observed and the main shock locates close to relative high b-value domains. Regions surrounding the location of the 1905 Kangra earthquake also display such high b-value for the period of 2005-2010 that calls for closer scrutiny. Temporal analysis of b-value from the epicentral block of Muzaffarabad earthquake clearly showed a high-low b-value couplet of 1.45-0.72, which may be treated as a typical precursor before an imminent large earthquake. Gumbel extreme value statistics indicate probability of occurrence of an event of Mw > 7.0 within 50 years in the region.