scholarly journals Intraplate earthquake occurrence and distribution in Peninsular Malaysia over the past 100 years

2021 ◽  
Vol 3 (7) ◽  
Author(s):  
Dony Adriansyah Nazaruddin ◽  
Helmut Duerrast
Keyword(s):  
Seismic Hazard ◽  
Subduction Zone ◽  
Peninsular Malaysia ◽  
List Type ◽  
Local Seismicity ◽  
Seismicity Pattern ◽  
Shallow Earthquakes ◽  
Hazard And Risk ◽  
Straits Of Malacca ◽  
Low Magnitude

AbstractPeninsular Malaysia is tectonically situated on a stable craton (intraplate) and so far experiences relatively little earthquake activities, thus considered as a region with low seismicity. This study uses earthquake data from 59 events obtained from various sources in the period 1922 to 2020. The overall seismicity in the study area is low as expected due to the general intraplate setting. Earthquakes occurred onshore and offshore of Peninsular Malaysia between latitudes 1° and 7° N and longitudes 99° and 105° E. The seismicity pattern shows that the epicenters are distributed spatially in some parts of the peninsula and in the Malacca Strait with several epicenter zones. Most of earthquakes are associated with several preexisting faults and fault zones indicating that they are the major contributor to the local seismicity. Meanwhile, some further earthquakes were caused by activities related to reservoirs. Magnitudes are ranging from Mw 0.7 to 5.4 with the majority is Mw 1.0 + and 2.0 +. Hypocenters are located in between 1 and 167 km deep (shallow to intermediate earthquakes) with the majority being shallow earthquakes (1–70 km). The deepest earthquake located in the Straits of Malacca can be associated with a slab detachment broken off from the Sumatran Subduction Zone. Finally, this study contributes to the understanding of the intraplate seismicity of Peninsular Malaysia as a basis for seismic hazard and risk assessment.Article Highlights Earthquake assessment over the last 100 year reveals low but clear seismicity with an associated seismic hazard and risk for certain areas. Shallow, low-magnitude earthquakes associated with reservoir activities and preexisting faults reactivated by the nearby subduction zone. A deeper, low-magnitude earthquake can be related to slab detachment from the Sumatran subduction zone toward the east.

Framework for a Ground-Motion Model for Induced Seismic Hazard and Risk Analysis in the Groningen Gas Field, The Netherlands

2017 ◽  
Vol 33 (2) ◽  
pp. 481-498 ◽  
Author(s):  
Julian J. Bommer ◽  
Peter J. Stafford ◽  
Benjamin Edwards ◽  
Bernard Dost ◽  
Ewoud van Dedem ◽  
...  
Keyword(s):  
Seismic Hazard ◽  
Ground Motion ◽  
Quantitative Estimation ◽  
Epistemic Uncertainty ◽  
Induced Earthquakes ◽  
Gas Field ◽  
Small Magnitude ◽  
Ground Motion Model ◽  
Hazard And Risk ◽  
Groningen Gas Field

The potential for building damage and personal injury due to induced earthquakes in the Groningen gas field is being modeled in order to inform risk management decisions. To facilitate the quantitative estimation of the induced seismic hazard and risk, a ground motion prediction model has been developed for response spectral accelerations and duration due to these earthquakes that originate within the reservoir at 3 km depth. The model is consistent with the motions recorded from small-magnitude events and captures the epistemic uncertainty associated with extrapolation to larger magnitudes. In order to reflect the conditions in the field, the model first predicts accelerations at a rock horizon some 800 m below the surface and then convolves these motions with frequency-dependent nonlinear amplification factors assigned to zones across the study area. The variability of the ground motions is modeled in all of its constituent parts at the rock and surface levels.

scholarly journals Introduction to the Groningen static reservoir model

2017 ◽  
Vol 96 (5) ◽  
pp. s39-s46 ◽  
Author(s):  
Clemens A. Visser ◽  
Jose L. Solano Viota
Keyword(s):  
Seismic Hazard ◽  
Current Paper ◽  
Reservoir Model ◽  
General Introduction ◽  
Reservoir Properties ◽  
Hazard And Risk ◽  
Modelling Techniques ◽  
The Subject ◽  
A Chain ◽  
Scientific Endeavour

AbstractThe assessment of the seismic hazard and risk associated with the extraction of gas from the Groningen field involves a chain of modelling efforts. The first step is a description of the 3D distribution of reservoir properties in the reservoir – the static reservoir model – and is the subject of this paper. Consecutive steps in the chain of models are described elsewhere in this volume. The construction of a static reservoir model is not strictly a scientific endeavour, but many of the applied modelling techniques are underpinned by extensive scientific research. This paper aims to give a general introduction to the approach followed by NAM to build static models for the Groningen field. More detailed accounts of the applied modelling techniques, the assessment of associated uncertainties or the usage of multiple modelling scenarios are beyond the scope of the current paper, but are referenced in the text.

Assessment of Seismic Hazard and Risk in Emirate of Abu Dhabi

2011 ◽  
Author(s):  
A. Megahed ◽  
Z. Milutinovic ◽  
Y. Al Marzooqi ◽  
A. Megahed ◽  
H. Almulla
Keyword(s):  
Seismic Hazard ◽  
Abu Dhabi ◽  
Hazard And Risk

scholarly journals Seismic vulnerability and risk assessment of Kolkata City, India

2015 ◽  
Vol 15 (6) ◽  
pp. 1103-1121 ◽  
Author(s):  
S. K. Nath ◽  
M. D. Adhikari ◽  
N. Devaraj ◽  
S. K. Maiti
Keyword(s):  
Seismic Hazard ◽  
Seismic Vulnerability ◽  
Model Building ◽  
Disaster Mitigation ◽  
Free Zone ◽  
Building Typology ◽  
Hazard And Risk ◽  
Structural Risk ◽  
Risk Maps ◽  
The City

Abstract. The city of Kolkata is one of the most urbanized and densely populated regions in the world and a major industrial and commercial hub of the eastern and northeastern region of India. In order to classify the seismic risk zones of Kolkata we used seismic hazard exposures on the vulnerability components, namely land use/land cover, population density, building typology, age and height. We microzoned seismic hazard of the city by integrating seismological, geological and geotechnical themes in GIS, which in turn are integrated with the vulnerability components in a logic-tree framework for the estimation of both the socioeconomic and structural risk of the city. In both the risk maps, three broad zones have been demarcated as "severe", "high" and "moderate". There had also been a risk-free zone in the city that is termed as "low". The damage distribution in the city due to the 1934 Bihar–Nepal earthquake of Mw = 8.1 matches satisfactorily well with the demarcated risk regime. The design horizontal seismic coefficients for the city have been worked out for all the fundamental periods that indicate suitability for "A", "B" and "C" type of structures. The cumulative damage probabilities in terms of "none", "slight", "moderate", "extensive" and "complete" have also been assessed for the predominantly four model building types viz. RM2L, RM2M, URML and URMM for each seismic structural risk zone in the city. Both the seismic hazard and risk maps are expected to play vital roles in the earthquake-inflicted disaster mitigation and management of the city of Kolkata.

scholarly journals Seismic hazard and risk in Bhutan

2020 ◽  
Vol 104 (3) ◽  
pp. 2339-2367
Author(s):  
Victoria L. Stevens ◽  
Raffaele De Risi ◽  
Romain Le Roux-Mallouf ◽  
Dowchu Drukpa ◽  
György Hetényi
Keyword(s):  
Seismic Hazard ◽  
Hazard And Risk

scholarly journals Global occurrence and impact of small-to-medium magnitude earthquakes: a statistical analysis

2019 ◽  
Vol 18 (1) ◽  
pp. 1-35 ◽  
Author(s):  
Cecilia I. Nievas ◽  
Julian J. Bommer ◽  
Helen Crowley ◽  
Jan van Elk
Keyword(s):  
Statistical Analysis ◽  
Seismic Hazard ◽  
Earthquake Catalogue ◽  
Individual Contribution ◽  
Induced Earthquakes ◽  
A Value ◽  
Magnitude Range ◽  
Hazard And Risk ◽  
Definition Of ◽  
The Impact

Abstract Despite their much smaller individual contribution to the global counts of casualties and damage than their larger counterparts, earthquakes with moment magnitudes Mw in the range 4.0–5.5 may dominate seismic hazard and risk in areas of low overall seismicity, a statement that is particularly true for regions where anthropogenically-induced earthquakes are predominant. With the risk posed by these earthquakes causing increasing alarm in certain areas of the globe, it is of interest to determine what proportion of earthquakes in this magnitude range that occur sufficiently close to population or the built environment do actually result in damage and/or casualties. For this purpose, a global catalogue of potentially damaging events—that is, earthquakes deemed as potentially capable of causing damage or casualties based on a series of pre-defined criteria—has been generated and contrasted against a database of reportedly damaging small-to-medium earthquakes compiled in parallel to this work. This paper discusses the criteria and methodology followed to define such a set of potentially damaging events, from the issues inherent to earthquake catalogue compilation to the definition of criteria to establish how much potential exposure is sufficient to consider each earthquake a threat. The resulting statistics show that, on average, around 2% of all potentially-damaging shocks were actually reported as damaging, though the proportion varies significantly in time as a consequence of the impact of accessibility to data on damage and seismicity in general. Inspection of the years believed to be more complete suggests that a value of around 4–5% might be a more realistic figure.

An assessment of seismic hazard and risk in the islands of Cephalonia and Ithaca, Greece

2012 ◽  
Vol 32 (1) ◽  
pp. 15-25 ◽  
Author(s):  
George A. Papagiannopoulos ◽  
George D. Hatzigeorgiou ◽  
Dimitri E. Beskos
Keyword(s):  
Seismic Hazard ◽  
Hazard And Risk
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