scholarly journals Model Percepatan Tanah Maksimum Di Kota Manado Menggunakan Metode Donovan dan McGuire

Jurnal MIPA ◽  
2018 ◽  
Vol 7 (1) ◽  
pp. 52
Author(s):  
Guntur Pasau ◽  
Maria Daurina Bobanto ◽  
Dolfie P. Pandara
Keyword(s):  
Peak Ground Acceleration ◽  
Observation Interval ◽  
Earthquake Risk ◽  
Ground Acceleration ◽  
The North ◽  
A Value ◽  
Earthquake Hypocenter ◽  
Acceleration Analysis ◽  
Mitigation Effort ◽  
The Impact

Telah dilakukan analisis percepatan tanah maksimum gempa bumi di Kota Manado menggunakan metode Donovan dan McGuire. Kota Manado merupakan bagian dari lengan utara Pulau Sulawesi terletak pada batas pertemuan beberapa lempeng besar sehingga wilayah ini sangat rawan akan goncangan gempa bumi. Upaya mitigasi perlu dilakuakn sejak dini untuk memperkecil dampak resiko gempa bumi tersebut. Salah satu upaya mitigasi adalah memetakan percepatan tanah maksimum (peak ground acceleration) di permukaan. Penentuan variasi nilai percepatan tanah maksimum menggunakan metode Donovan dan metode McGuire. Data yang digunakan adalah data hypocenter gempa yang dikumpulkan dari dua katalog yakni data USGS dan ANSS selama selang pengamatan Februari 1963 sampai Agustus 2017 meliputi radius 500 km dari Kota Manado. Hasil analisis menunjukkan bahwa percepatan tanah maksimum di Kota Manado menggunkan metode Donovan sekitar 42.12 gal sampai dengan 51.82 gal sedangkan metode Mc Guire diperoleh nilai percepatan tanah sekitar 59.13 gal sampai 72.53 gal.The peak ground acceleration analysis in Manado city has been done using Donovan and McGuire method. Manado City is part of the north arm of Sulawesi Island located at the boundary of several major plate meetings so that this region is very prone to earthquake shocks. Mitigation efforts need to be done early to minimize the impact of the earthquake risk. One mitigation effort is to map the peak ground acceleration on the surface. Determination of peak ground acceleration variation using the Donovan and McGuire method. The data used are earthquake hypocenter data collected from two catalogs namely USGS and ANSS data during the observation interval February 1963 to August 2017 covering a radius of 500 km from Manado City. The result of the analysis shows that the peak ground acceleration in Manado City uses Donovan method about 42.12 gal up to 51.82 gal while Mc Guire method obtained the peak ground acceleration a value of  about 59.13 gal to 72.53 gal.

scholarly journals Peak Ground Acceleration and Earthquake Intensity Microzonation in Watukumpul, Pemalang Regency

2019 ◽  
Vol 3 (2) ◽  
pp. 60
Author(s):  
Urip Nurwijayanto Prabowo ◽  
Ayu Fitri Amalia ◽  
Widodo Budhi
Keyword(s):  
Peak Ground Acceleration ◽  
Spectral Ratio ◽  
Ratio Method ◽  
Earthquake Intensity ◽  
Ground Acceleration ◽  
Predominant Period ◽  
The North ◽  
Central Java ◽  
Intensity Calculation ◽  
Microtremor Measurements

Watukumpul is located in Pemalang District, Central Java, which is adjacent to the fault seismotectonic line of Baribis fault in the north and subduction area of the Eurasian and Indies-Australian plates in the south. It makes Watukumpul often experiences an earthquake. This study aimed to map the peak ground acceleration calculated using the Kanai equation and earthquake intensity calculated using Wald equations in Watukumpul. This study used historical earthquake data occurred in 1988-April 2018 from the International Seismological Center and microtremor measurements of 33 points. Microtremor data were processed using the Horizontal to Vertical Spectral Ratio method and resulted the predominant period of study area ranged from 0.13 to 0.74 s. The results showed that the study area had a PGA value of 26.93 - 63.25 gal. The intensity calculation showed that the study area has the potential for earthquake damage with an III-IV MMI scale. Keywords: Kanai, Watukumpul, Intensity, Earthquake

scholarly journals Mapping seismic exposure of building based surface peak ground acceleration: initial seismic risk assessment in Bandung Basin, West Java

2021 ◽  
Vol 331 ◽  
pp. 07002
Author(s):  
Afnindar Fakhrurrozi ◽  
Anggun Mayang Sari ◽  
Arifan Jaya Syahbana ◽  
Dwi Sarah ◽  
Bambang Setiadi ◽  
...  
Keyword(s):  
Seismic Hazard ◽  
Physical Environment ◽  
Seismic Risk ◽  
Peak Ground Acceleration ◽  
Residential Buildings ◽  
Disaster Risk ◽  
The West ◽  
Ground Acceleration ◽  
Risk Zone ◽  
The Impact

An important key to determining the disaster risk is exposure. It is truly dynamic in space and time due to the expansion and change of the settlements. A seismic hazard is an earthquake disaster that can deliver damage to the physical environment. Hence, it is required to analyse the objects exposed by an active earthquake source in the Bandung Basin. The exposed objects that experience the most impact due to the shock of the earthquake are residential buildings. The West Bandung Regency was opted as our study area due to the high-risk zone for earthquake waves based on seismic hazard calculation. This paper tried to analyse the seismic exposure as the impact of earthquake waves around the Bandung Basin on physical buildings in the West Bandung Regency using a geospatial analytics approach. The result shows that the location area with many damaged buildings correlates with the spatial distribution of surface peak ground acceleration.

scholarly journals ANALISA TINGKAT BAHAYA DAN KERENTANAN BENCANA GEMPA BUMI DI WILAYAH NUSA TENGGARA TIMUR (NTT)

2017 ◽  
Vol 18 (1) ◽  
pp. 32 ◽  
Author(s):  
Ni Made Rysnawati ◽  
I Ketut Sukarasa ◽  
Ida Bagus Alit Paramarta
Keyword(s):  
Population Density ◽  
Peak Ground Acceleration ◽  
Earthquake Hazard ◽  
High Population Density ◽  
Vulnerability Factors ◽  
Ground Acceleration ◽  
The North ◽  
Two Factors ◽  
Back Arc ◽  
Very High

East Nusa Tenggara is a region in Indonesia which included in the category of hazard prone to earthquakes, because it is flanked by two earthquakes zones, (subduction zone at the south and back arc trust in the north). It is also vulnerable to earthquake disasters because of high population density. These conditions would threaten the safety of lives and property of the population, so it needs to be research to analyze the level of earthquake hazard and vulnerability in East Nusa Tenggara. For identification of the level of hazard and the vulnerability of the earthquake in this study using two factors: the danger factor with indicator Peak Ground Acceleration, vulnerability factors with indicators of population density districts in East Nusa Tenggara. The calculation of the value of PGA use attenuation function of Fukushima and Tanaka. From the calculation of the data obtained that has a very high earthquake hazard is in Ende and Alor district, while the district has a very high risk of vulnerability is in Sikka, Sumba Barat Daya and Sabu Raijua.  

scholarly journals Los sismos intraplaca de septiembre de 2017: un breve análisis de su impacto en el territorio veracruzano

UVserva ◽  
2018 ◽  
Author(s):  
Francisco Córdoba Montiel ◽  
Katrin Sieron
Keyword(s):  
Peak Ground Acceleration ◽  
Web Survey ◽  
Interplate Earthquake ◽  
Tectonic Plate ◽  
Ground Acceleration ◽  
Tectonic Plates ◽  
Fault Type ◽  
La Red ◽  
The Impact ◽  
Dominant Frequencies

El Servicio Sismológico Nacional (SSN) reportó un sismo el día 7 de septiembre de 2017 con Mw 8.2 a una profundidad de 59 km y otro con Mw 7.1 y profundidad de 57 km el 19 de septiembre, curiosamente a 32 años del sismo interplaca de 1985 (M 8.1). Ambos eventos presentaron similitudes en cuanto al tipo de fallamiento (normal), profundidad y la placa tectónica donde se originó la ruptura. Para estudiar lo que concierne al impacto de estos sismos en el estado de Veracruz, se obtuvieron los valores máximos observados de aceleración y velocidad (PGA y PGV) durante ambos sismos en cada una de las estaciones de la Red Sísmica de Banda Ancha de Veracruz (RSBAV) y dos estaciones de banda ancha del Servicio Sismológico Nacional (SSN). Estos fueron relacionados con algunos daños reportados en esta entidad (para Xalapa con apoyo de una encuesta vía web), permitieron observar la atenuación con la distancia y analizar el contenido de frecuencias dominantes a partir de los registros de aceleración.Palabras clave: Placas tectónicas; sismo intraplaca; magnitud; intensidad; aceleración AbstractThe National Seismological Ser­vice (SSN) reported one earthquake on 7 Sep­tember 2017 with Mw 8.2 at a depth of 59 km. Another earthquake, with Mw 7.1 and depth of 57 km, occurred on September 19, curiously 32 years after the interplate earthquake of 1985 (Mw 8.1). Both recent events presented similarities as to the fault type (normal), depth and the tectonic plate where the rupture origina­ted. We study the impact of these earthquakes in the state of Veracruz, by obtaining the peak ground acceleration and velocity (PGA and PGV) at stations of the Veracruz Broadband Seismic Network (RSBAV) and two broadband stations of the National Seismological Servi­ce (SSN) during both earthquakes. We relate them to some damages reported in the Vera­cruz state (for Xalapa city with the support of a web survey), observe the attenuation with distance, and analyze the content of dominant frequencies from the records of acceleratio.Keywords: Tectonic Plates; intraplate earth­quake; magnitude; intensity; acceleration

scholarly journals Scenario-based earthquake hazard and risk assessment for Baku (Azerbaijan)

2010 ◽  
Vol 10 (12) ◽  
pp. 2697-2712 ◽  
Author(s):  
G. Babayev ◽  
A. Ismail-Zadeh ◽  
J.-L. Le Mouël
Keyword(s):  
Risk Assessment ◽  
Seismic Hazard ◽  
Peak Ground Acceleration ◽  
Water Level Fluctuations ◽  
Industrial Building ◽  
Earthquake Risk ◽  
Population Exposure ◽  
Ground Acceleration ◽  
Earthquake Scenarios ◽  
The City

Abstract. A rapid growth of population, intensive civil and industrial building, land and water instabilities (e.g. landslides, significant underground water level fluctuations), and the lack of public awareness regarding seismic hazard contribute to the increase of vulnerability of Baku (the capital city of the Republic of Azerbaijan) to earthquakes. In this study, we assess an earthquake risk in the city determined as a convolution of seismic hazard (in terms of the surface peak ground acceleration, PGA), vulnerability (due to building construction fragility, population features, the gross domestic product per capita, and landslide's occurrence), and exposure of infrastructure and critical facilities. The earthquake risk assessment provides useful information to identify the factors influencing the risk. A deterministic seismic hazard for Baku is analysed for four earthquake scenarios: near, far, local, and extreme events. The seismic hazard models demonstrate the level of ground shaking in the city: PGA high values are predicted in the southern coastal and north-eastern parts of the city and in some parts of the downtown. The PGA attains its maximal values for the local and extreme earthquake scenarios. We show that the quality of buildings and the probability of their damage, the distribution of urban population, exposure, and the pattern of peak ground acceleration contribute to the seismic risk, meanwhile the vulnerability factors play a more prominent role for all earthquake scenarios. Our results can allow elaborating strategic countermeasure plans for the earthquake risk mitigation in the Baku city.

On strong ground motion estimates based on models of the radiated spectrum

1985 ◽  
Vol 75 (3) ◽  
pp. 641-649
Author(s):  
J. Enrique Luco
Keyword(s):  
Ground Motion ◽  
Stress Drop ◽  
Peak Ground Acceleration ◽  
Strong Ground Motion ◽  
Source Model ◽  
Spectral Model ◽  
Ground Acceleration ◽  
A Value ◽  
Strong Ground ◽  
Good Agreement

Abstract Estimates for peak ground acceleration and velocity were obtained by use of the approach of Hanks and McGuire (1981) and Boore (1983) for a model of the radiated spectrum corresponding to Brune's ω−2 source model modified by an exponentially decreasing function of frequency. This modification was suggested by the work of Anderson and Hough (1984) on spectral amplitudes. For this spectral model, it was found that it is not possible to determine a value for the stress drop parameter such that agreement with data is obtained for both peak accelerations and velocities. This finding contrasts with that of Boore (1983) who found good agreement with data by introducing an artificial cut-off frequency of 15 Hz.

scholarly journals Seismic and Structural Analyses of the Eastern Anatolian Region (Turkey) Using Different Probabilities of Exceedance

2021 ◽  
Vol 4 (4) ◽  
pp. 89
Author(s):  
Ercan Işık ◽  
Ehsan Harirchian ◽  
Aydın Büyüksaraç ◽  
Yunus Levent Ekinci
Keyword(s):  
Seismic Hazard ◽  
Ground Motion ◽  
Seismic Design ◽  
Seismic Moment ◽  
Peak Ground Acceleration ◽  
Earthquake Ground Motion ◽  
Earthquake Risk ◽  
Ground Acceleration ◽  
Earthquake Parameters ◽  
Seismic Design Code

Seismic hazard analysis of the earthquake-prone Eastern Anatolian Region (Turkey) has become more important due to its growing strategic importance as a global energy corridor. Most of the cities in that region have experienced the loss of life and property due to significant earthquakes. Thus, in this study, we attempted to estimate the seismic hazard in that region. Seismic moment variations were obtained using different types of earthquake magnitudes such as Mw, Ms, and Mb. The earthquake parameters were also determined for all provincial centers using the earthquake ground motion levels with some probabilities of exceedance. The spectral acceleration coefficients were compared based on the current and previous seismic design codes of the country. Additionally, structural analyses were performed using different earthquake ground motion levels for the Bingöl province, which has the highest peak ground acceleration values for a sample reinforced concrete building. The highest seismic moment variations were found between the Van and Hakkari provinces. The findings also showed that the peak ground acceleration values varied between 0.2–0.7 g for earthquakes, with a repetition period of 475 years. A comparison of the probabilistic seismic hazard curves of the Bingöl province with the well-known attenuation relationships showed that the current seismic design code indicates a higher earthquake risk than most of the others.

scholarly journals A model for the attenuation of peak ground acceleration in New Zealand earthquakes based on seismograph and accelerograph data

1999 ◽  
Vol 32 (4) ◽  
pp. 193-220 ◽  
Author(s):  
W. J. Cousins ◽  
J. X. Zhao ◽  
N. D. Perrin
Keyword(s):  
New Zealand ◽  
Peak Ground Acceleration ◽  
Strong Motion ◽  
Taupo Volcanic Zone ◽  
Weak Rock ◽  
Volcanic Zone ◽  
Ground Acceleration ◽  
High Attenuation ◽  
The North ◽  
Strong Rock

A combination of weak-motion velocity data from seismographs and strong-motion acceleration data from accelerographs has been used to model the attenuation of peak ground acceleration (PGA) in New Zealand earthquakes. The resulting model extends the PGA attenuation model of Zhao, Dowrick and McVerry [30] to include the variability of rock strength, and also describes the unusually high attenuation in the volcanic zone of the North Island of New Zealand. Strong-rock sites were found to experience lower PGAs than either weak rock or soil sites for magnitudes below Mw 7, and the apparent degree of amplification on going from strong rock to weak rock or soil decreased as the magnitude increased from Mw 5 to Mw 7. At magnitude 7 the PGAs were very similar for all site classes for source distances up to 100 km. When extrapolated to magnitudes beyond the maximum of the data, Mw 7.4, the model predicted that PGAs for strong rock sites were greater than for weak rock or soil sites. The so-called "whole Taupo Volcanic Zone" was found to provide a good boundary for the zone of high attenuation in the volcanic region of the North Island. The high attenuation was successfully modelled as a simple function of the length of travel path through the zone of high attenuation. Over the effective maximum volcanic path length of about 70 km the extra attenuation resulted in a factor of ten reduction in PGA compared with non-volcanic paths of the same length.

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