Recent Seismic Microzoning Maps in Japan

2006 ◽  
Vol 1 (2) ◽  
pp. 201-209
Author(s):  
Saburoh Midorikawa ◽  
Keyword(s):  
Seismic Hazard ◽  
Performance Appraisal ◽  
Local Governments ◽  
Disaster Mitigation ◽  
Seismic Retrofitting ◽  
General View ◽  
Seismic Microzoning ◽  
Kobe Earthquake ◽  
Earthquake Research ◽  
Hazard And Risk

In Japan, seismic microzoning has been conducted as the basis for better disaster planning by governments. This paper introduces various seismic microzoning maps published by the central and local governments in Japan after the 1995 Kobe earthquake. Nation-wide seismic hazard maps are published by the Headquarters for Earthquake Research Promotion, to understand the general view of seismic hazard nationwide. Regional seismic microzoning maps are prepared by the Central Disaster Prevention Council for large subduction earthquakes and the Tokyo Metropolitan earthquake. Based on results of the microzonings, strategies are proposed for disaster mitigation of the earthquakes. Local governments prepare more detailed, smaller scale maps, e.g., the Yokohama shake map using a 50 m mesh system. After the publication of the map, the numbers of applicants for seismic performance appraisal service of wooden houses and for seismic retrofitting subsidies from the city increased significantly. This stimulated central and local governments, which started detailed mapping studies. Seismic microzoning maps are being used not only for governments but also for citizens. The maps should evolve both for more attractive presentation to deepen citizens' understanding and for more reliable and comprehensive estimates of seismic 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 vulnerability and risk assessment of Kolkata City, India

2014 ◽  
Vol 2 (4) ◽  
pp. 3015-3063 ◽  
Author(s):  
S. K. Nath ◽  
M. D. Adhikari ◽  
N. Devaraj ◽  
S. K. Maiti
Keyword(s):  
Seismic Hazard ◽  
Seismic Risk ◽  
Seismic Vulnerability ◽  
Model Building ◽  
Disaster Mitigation ◽  
Free Zone ◽  
Building Typology ◽  
Hazard And Risk ◽  
Risk Maps ◽  
The City

Abstract. The city of Kolkata is one of the most urbanized and densely populated regions in the world, which is 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, landuse/landcover, 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 is integrated with the vulnerability components in a logic-tree framework to estimate both the socio-economic 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. The damage distribution in the City due to the 1934 Bihar-Nepal Earthquake of Mw 8.1 well matches with the risk regime. The design horizontal seismic coefficients for the City have been worked out for all the predominant periods which indicate suitability of "A", "B" and "C" type of structures. The cumulative damage probabilities in terms of "slight", "moderate", "extensive" and "complete" have also been assessed for the significant four model building types viz. RM2L, RM2M, URML and URMM for each structural seismic 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.

SEISMIC RISK ASSESSMENT AND MITIGATION FOR THE EXISTING LIFELINE

2011 ◽  
Vol 05 (01) ◽  
pp. 31-45 ◽  
Author(s):  
T. IMAI ◽  
S. WADA ◽  
T. KOIKE
Keyword(s):  
Risk Assessment ◽  
Seismic Risk ◽  
Water Distribution ◽  
Water Distribution Network ◽  
Assessment Method ◽  
Disaster Mitigation ◽  
Seismic Retrofitting ◽  
Network System ◽  
Investment Strategies ◽  
Seismic Risk Assessment

In order to keep the existing lifeline network system at a favorable seismic performance level, it is necessary to carry out retrofitting activities. This study proposes a seismic risk assessment method for the existing deteriorated lifeline network system based on the probability of system performance failure. Numerical simulations are carried out for the existing water distribution network system for several seismic investment strategies to support the decision making of seismic disaster mitigation planning. Effective planning of seismic retrofitting activities and disaster mitigation for the existing lifeline system can be realized using the newly developed assessment method.

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 The Preparedness Level of Families with Disabilities Children in Facing the Earthquake and Tsunami Disaster in Padang, West Sumatra

2021 ◽  
Vol 4 (1) ◽  
pp. 61
Author(s):  
Muchsin Riviwanto ◽  
Darwel Darwel ◽  
Defriani Dwiyanti ◽  
Juanda Juanda
Keyword(s):  
Disaster Preparedness ◽  
Local Governments ◽  
Statistical Tests ◽  
Disaster Mitigation ◽  
Special Treatment ◽  
Preparedness Plan ◽  
Tsunami Disaster ◽  
West Sumatra ◽  
The Face ◽  
Index Value

Disability groups are groups vulnerable to disaster risk. Most families with disabilities feel worried about defending themselves in the event of a disaster. They are less socialized with disaster mitigation efforts. This research has provided an overview of the preparedness of families with disabilities children in increasing disaster resilience. Analytical research was conducted on families with disabilities children in the city of Padang. Data collection tools in this study used a standard questionnaire from LIPI-UNESCO / ISDR. The data were processed by a computer and analyzed using multiple regression statistical tests. The results showed the preparedness of Families With Disabilities Children in the face of disasters; it was seen that the knowledge category was ready (42.2%), the preparedness plan category was not ready (37.8%), the disaster warning category was not ready (46.7%), the resource mobilization category was not ready, ready (82.2%), the tsunami disaster preparedness index value is 57% (ready category). This research recommended local governments must provide special treatment for people with disabilities by increasing training, seminars, and disaster simulations.

scholarly journals SEISMIC VULNERABILITY OF REINFORCED CONCRETE BRIDGES IN PAKISTAN

2022 ◽  
Vol 28 (2) ◽  
pp. 93-105
Author(s):  
Muhammad Khalid Hafiz ◽  
Qaiser-uz-Zaman Khan ◽  
Sohaib Ahmad
Keyword(s):  
Seismic Hazard ◽  
Seismic Vulnerability ◽  
Seismic Hazard Assessment ◽  
Highway Bridges ◽  
Concrete Bridges ◽  
Seismic Retrofitting ◽  
Seismic Zone ◽  
Code Of Practice ◽  
Recent Earthquakes ◽  
Existing Bridges

Different researchers have performed seismic hazard assessment studies for Pakistan using faults sources which differ from Building Code of Pakistan (BCP 2007) with diverse standard deviations. The results of seismic hazard studies indicate that BCP requires gross revision considering micro and macro level investigations. The recent earthquakes in Pakistan also damaged bridge structures and some studies have been conducted by different researchers to investigate capacity of existing bridges. The most of bridge stock in Pakistan has been designed assuming seismic loads as 2%, 4% and 6% of dead loads following West Pakistan Code of Practice for Highway Bridges. The capacity of eight selected real bridges, two from each seismic zone 2A, 2B, 3 & 4 is checked against BCP demands. Static and dynamic analyses were performed and the piers were checked for elastic limits. It is established that piers are on lower side in capacity and the bridges in zone 2A are generally less vulnerable. Whereas the bridges in zone 2B, 3 and 4 are vulnerable from medium to very high level. Hence, an in-depth analytical vulnerability study of bridge stock particularly in high-risk zone needs to be conducted on priority and appropriate seismic retrofitting schemes need to be proposed.

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 On the reliability of the geomagnetic quake as a short time earthquake's precursor for the Sofia region

2004 ◽  
Vol 4 (3) ◽  
pp. 433-447 ◽  
Author(s):  
S. Cht. Mavrodiev
Keyword(s):  
Electromagnetic Field ◽  
Seismic Hazard ◽  
Earthquake Prediction ◽  
Gravitational Potential ◽  
Time Window ◽  
Hazard Maps ◽  
Earthquake Research ◽  
Short Time ◽  
Special Space ◽  
Precursory Information

Abstract. The local "when" for earthquake prediction is based on the connection between geomagnetic "quakes" and the next incoming minimum or maximum of tidal gravitational potential. The probability time window for the predicted earthquake is for the tidal minimum approximately ±1 day and for the maximum ±2 days. The preliminary statistic estimation on the basis of distribution of the time difference between occurred and predicted earthquakes for the period 2002-2003 for the Sofia region is given. The possibility for creating a local "when, where" earthquake research and prediction NETWORK is based on the accurate monitoring of the electromagnetic field with special space and time scales under, on and over the Earth's surface. The periodically upgraded information from seismic hazard maps and other standard geodetic information, as well as other precursory information, is essential.

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