scholarly journals Seismic microzonation based on microseismic data and damage distribution of 2006 Yogyakarta Earthquake

2019 ◽  
Vol 76 ◽  
pp. 03008
Author(s):  
Radhitya Perdhana ◽  
Budi Eka Nurcahya
Keyword(s):  
Amplification Factor ◽  
Spectral Ratio ◽  
Geological Condition ◽  
Predominant Frequency ◽  
Damage Distribution ◽  
Local Site Effects ◽  
Central Java ◽  
Local Site ◽  
Hvsr Technique

The 2006 Yogyakarta earthquake caused an extensive damage to various areas of Yogyakarta regions. The damage distribution indicates the role of local site effects during the earthquake as the damage extended from Bantul Regency in Yogyakarta Province to Klaten Regency in Central Java. Microzonation based on the damage distribution is then carried out using Horizontal-to-Vertical Spectral Ratio (HVSR) technique. From this technique, amplification factor and predominant frequency can be obtained and then spatially mapped. Inversion can also be conducted to the HVSR curves to infer the geological condition of the study area.

scholarly journals USE OF AMBIENT VIBRATIONS IN UNDERSTANDING LOCAL SITE EFFECTS AT BROADBAND SEISMIC STATIONS OF THE HELLENIC UNIFIED SEISMOLOGICAL NETWORK (HUSN)

2017 ◽  
Vol 50 (3) ◽  
pp. 1505
Author(s):  
D. Kementzetzidou ◽  
P. Paradisopoulou ◽  
K. Gkogkas ◽  
E. Arampatzi ◽  
E. Kyriakidou ◽  
...  
Keyword(s):  
Site Effects ◽  
Network Performance ◽  
Seismic Station ◽  
Spectral Ratio ◽  
Ambient Vibration ◽  
Ambient Vibrations ◽  
Local Site Effects ◽  
Local Site ◽  
Noise Measurements ◽  
Geophysical Information

The evaluation of ambient seismic noise at the Hellenic Unified Seismic Network (HUSN) stations is investigated in this study. Ambient vibration recordings combined with the horizontal to vertical (H/V) spectral ratio technique helps in characterizing local site effects. This technique was applied at 17 sites ambient noise measurements. We selected a number of 1-hr waveform segments during day and night for summer and winter. For each site the H/V spectral ratio was calculated and the results were combined with geological and geophysical information. The goal was to show the network performance as far as the station quality and noise level at each site concerns in order to provide possible structural improvements, seismic station relocations or to detecting operational problems.

scholarly journals Microtremor HVSR study of site effects in the urban area of the town of Mytilene, Lesvos (Greece) - Preliminary results.

2016 ◽  
Vol 47 (3) ◽  
pp. 1081
Author(s):  
E. Bouranta ◽  
F. Vallianatos ◽  
N. J. Hatzopoulos ◽  
I. Papadopoulos ◽  
P. Gaganis
Keyword(s):  
Amplification Factor ◽  
Spectral Ratio ◽  
Predominant Frequency ◽  
The North ◽  
Soil Deposits ◽  
North Aegean ◽  
Microtremor Measurement ◽  
The City ◽  
The Town ◽  
Microtremor Measurements

Mytilene is the capital of Lesvos, the eighth largest island in the Mediterranean Sea and the largest in the North Aegean. The region of North Aegean is a geotectonically complex area, because its geodynamic status is directly affected by the North Anatolian Fault Zone. In the present paper, microtremor data have been analyzedfor the city of Mytilene using Nakamura technique of Horizontal to Vertical Spectral Ratio (HVSR) to ascertain the structure in terms of the predominant frequency. 100 microtremor measurements have been performed in the city of Mytilene. At each point of microtremor measurement, the natural frequency and amplification factor have been determined. The predominant frequency varies from 0.4 Hz to 6.6 Hz. The amplification factor in 0.4-8.07 range has been obtained from the HVSR analysis. The results are presented in terms of maps, including the spatial variability of the predominant frequency and developed GIS database. The results of this study make it clear that the characteristics of microtremors depend on the type of soil deposits.

scholarly journals Local Site Effects Evaluation Using Microtremor Measurements at North Side of Pandan Mountain

2017 ◽  
Vol 1 (2) ◽  
pp. 89 ◽  
Author(s):  
Samsul Hidayat ◽  
Dwa Desa Warnana ◽  
Sorja Koesuma ◽  
C Cari
Keyword(s):  
Natural Frequency ◽  
Amplification Factor ◽  
Spectral Ratio ◽  
Vulnerability Index ◽  
Disaster Mitigation ◽  
Residential Areas ◽  
Weak Zone ◽  
Local Site ◽  
Index Value ◽  
The Impact

Disaster mitigation has been undertaken to reduce the impact of loss or damage caused by the earthquake. For disaster mitigation purpose, it is necessary to conduct a local geological assessment. The horizontal to vertical spectral ratio (HVSR) of microtremor analysis is very popular in the context of seismic micro-zonation. Microtremor method is cheap, data acquisition is easy, and does not cause noise, so suitable for use in residential areas. This research aims to determine the distribution of the natural frequency value, the amplification factor value, and the soil vulnerability index value. This study was conducted geographically between 7°26'17.45" – 7°26'53.16" S and 111°47'14.76" – 111°48'7.06" E. Data processing using HVSR analysis method on Easy HVSR software. The results showed that the natural frequency (<em>f<sub>o</sub></em>) values range 0,95 Hz to 8,3 Hz and the amplification factor values range 2,05 to 8,67. From the result data of the natural frequency and the amplification factor, the soil vulnerability index can be calculated. The vulnerability index (Kg) value ranges from 1,09 to 68,33. The northeast side of the study area is indicated as a weak zone where have high potential to damage when the earthquake occurred.

scholarly journals Analysis of Site Amplification and Nonlinear Response Based on Ground Motion Records at MYGH10 Station in Japan

2021 ◽  
Author(s):  
Shiliang Zhang ◽  
Dongwang Tao ◽  
Quancai Xie ◽  
Qiang Ma ◽  
Fuchen Wang
Keyword(s):  
Ground Motion ◽  
Amplification Factor ◽  
Ground Motions ◽  
Spectral Ratio ◽  
Site Amplification ◽  
Predominant Frequency ◽  
Strong Ground Motions ◽  
Ground Motion Records ◽  
Site Amplification Factor ◽  
Strong Ground

Abstract Strong horizontal ground motions with the peak ground acceleration (PGA) larger than 1400 gal were observed at Yamamoto (MYGH10) station during the February 2021 Mj 7.3 off the east coast of Honshu, Japan, Fukushima earthquake. Firstly, in this paper, we discussed and verified the theoretical assumptions of the “Nakamura” method under weak and strong ground motions. The site amplification factor of the MYGH10 station was estimated using the surface horizontal-vertical spectral ratio (HVSR) and the surface-to-borehole spectral ratio (SBSR), and the corrected HVSRC, respectively. Meanwhile, the reasons for underestimating the site amplification factor when using HVSR were explained. The vertical amplification phenomenon of seismic P-wave in the high-frequency band was analysed under weak and strong ground motions. Secondly, we utilized HVSR, SBSR, and theoretical transfer function (TTF) based on the 1D wave propagation theory to study the nonlinear site response of MYGH10 station under the mainshock of the Fukushima earthquake and the historically weak and strong ground motions, respectively. The changes in frequencies and amplitudes of the spectral ratio curves when nonlinearities were occurring at the site were analysed and compared using the spectra ratio curves of weak ground motion records and TTF as references. Finally, the recovery of the site after strong nonlinearity was also evaluated by comparing the spectral ratio curves of aftershocks records. We found that the most significant amplification factor of the site increased from 7 to more than 10, and the predominant frequency decreased from 10 Hz to 3.8 Hz under the mainshock of the Fukushima earthquake. The predominant frequency returned to the previous value within three days after the mainshock, but the amplification factor did not.

HUBUNGAN PERAN KADER POSYANDU DENGAN STATUS GIZI BALITA

2018 ◽  
Vol 9 (02) ◽  
pp. 192
Author(s):  
Wiwid Wahyuningsih ◽  
Atik Setiyaningsih
Keyword(s):  
Nutritional Status ◽  
Total Sample ◽  
Nutrition Status ◽  
P Value ◽  
Chi Square ◽  
Cross Sectional ◽  
Central Java ◽  
Good Nutrition ◽  
Nutritional Status Of Children

ABSTRAKLatar Belakang : Keberadaan kader di posyandu sebagai salah satu sistem penyelenggarakan pelayanan sangat dibutuhkan. Mereka adalah ujung tombak  pelayanan kesehatan yang merupakan kepanjangtanganan puskesmas Jawa Tengah tahun 2011 jumlah gizi kurang 5,35% dan gizi buruk 0,10%. Untuk Kabupaten Semarang dari 23.562 balita yang ditimbang pada tahun 2011 gizi lebih 1,13%, gizi baik 93,51%, gizi kurang 4,86% dan gizi buruk 0,49% (DepKes Prov Jateng, 2011). Tujuan Penelitian : Penelitian ini bertujuan untuk mengetahui hubungan peran kader posyandu dengan status gizi balita. Metode Penelitian : Desain penelitian ini adalah survey analitik dengan menggunakan pendekatan cross sectional. Populasi dalam penelitian ini adalah seluruh balita di Posyandu Mawar di Desa Gedangan sejumlah 40 responden, dengan teknik total sampling dan analisa data chi square. Hasil Penelitian : Hasil perhitungan chi square di peroleh X² hitung 10.644 pada df=4, P.value 0.031 dimana probabilitas lebih kecil dari level of significant 5 % (0,001 < 0,05) berarti Ha diterima dan Ho ditolak. Kesimpulan : ada hubungan antara peran kader posyandu dengan status gizi pada balita.Kata Kunci : peran kader , status gizi balitaCADERE ROLE RELATIONSHIP WITH NUTRITIONAL STATUS OF CHILDREN POSYANDUABSTRACTBackground : posyandu cadre in Existence as one of the 56th's service system is urgently needed. They are the tip of the Spear is a kepanjangtanganan health services clinics in Central Java in 2011 the amount of nutrition less 5.35% 0.10% and malnutrition. To Semarang from 23.562 toddler who weighed in 2011 more nutritional 1.13%, 93,51%, good nutrition nutrition less 4.86% and 0.49% poor nutrition (Department of Health Central Java Prov., 2011). Objective : the research aims to find out the relationship role of posyandu cadre with the nutritional status of children. Methods : the design of this research is a survey using the analytic approach of cross sectional. The population in this study are all the toddlers at the Rose in the village of Posyandu Gedangan some 38 respondents, with total sample techniques and data analysis a chi square. The results :. The chi square calculation results in getting X ² count 10.644 on df = 4, P. value 0.031 where probability is smaller than the level of significant 5% (0.001 < 0.05) mean Ha Ho accepted and rejected. Conclusion : there is a connection between the role of cadres of posyandu with nutritional status on toddlers.Keywords : the role of cadres, toddler nutrition status

The effect of consumers' religiosity on consumer ethics: the mediating role of ethical ideology

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Denni Arli ◽  
Fandy Tjiptono
Keyword(s):  
Consumer Ethics ◽  
Ethical Ideology ◽  
Negative Effects ◽  
Content Type ◽  
Mediating Role ◽  
Positive Effects ◽  
Central Java ◽  
Consumer Ethics Scale ◽  
The Impact

PurposeReligious doctrines generally encourage people to behave ethically. However, in daily life, individuals notice inconsistencies between religious beliefs and behavior, leading them to ask, in the context of commerce, why religious consumers would behave unethically. The purpose of this study was to investigate the impact of consumers' intrinsic and extrinsic religiosity on their ethical behavior. Specifically, the moderating effect of ethical ideology on the relationship between Indonesian consumers' religiosity and their ethics was examined by means of a survey.Design/methodology/approachThe data derived from the questionnaire were complemented by convenience samples of Indonesians living in Daerah Istimewa Yogyakarta (DIY) in central Java. The researchers distributed 600 questionnaires in two major shopping malls and several housing areas in the region, of which 467 were completed and returned, for an overall response rate of 77.8%.FindingsThe results indicated that the participants' intrinsic religiosity negatively impacted their ethical beliefs and was mediated by their idealistic ethical ideology. The present study also found that idealism had negative effects on three of the four dimensions of the consumer ethics scale (CES) (actively benefiting, passively benefiting and questionable behavior), while relativism had positive effects on two of the dimensions (passively benefiting and questionable behavior.Research limitations/implicationsOne limitation of the present study was that the analysis did not distinguish among the religions practiced by the respondents to the questionnaire.Originality/valueThis is one of the first few studies investigating the mediating role of ethical ideology in a religious society. This study contributes to the literature on these issues in theoretical and managerial terms by extending the Hunt-Vitell theory (1986) to the context of consumer ethics.

FAKTOR-FAKTOR YANG MENDORONG PERILAKU GETOK TULAR DI MEDIA SOSIAL

2018 ◽  
Vol 13 (1) ◽  
pp. 23
Author(s):  
Pramatatya Resindra Widya
Keyword(s):  
Social Media ◽  
Regression Analysis ◽  
Customer Satisfaction ◽  
Word Of Mouth ◽  
Repurchase Intentions ◽  
Customer Involvement ◽  
Central Java ◽  
Simple Regression Analysis ◽  
Positive Effect

This study aims to examine the role of social media as a means of electronic word of mouth. The variables studied in this study are customer satisfaction and customer involvement as antecedents and repurchase intentions as a consequence variable (Consequences). The sample in this study amounted to 206 respondents spread in Yogyakarta, Central Java, West Java, East Java, Bali, and Ambon with surveys conducted in a connected and unrelated. Hypothesis testing is done by multiple regression analysis and simple regression analysis. The results of this study suggest that in the Indonesian context, customer satisfaction does not affect the act of social media and customer involvement have a positive and significant effect on electronic act of speech through social media. Electronic speech act through social media has a positive effect on repurchase intentions.Keywords: social media, electronic word of mounth, repeat purchase, regression  ABSTRAKPenelitian ini bertujuan untuk menguji peran media sosial sebagai sarana getok tular elektronik. Variabel yang diteliti dalam penelitian ini adalah kepuasan pelanggan dan keterlibatan pelanggan sebagai anteseden dan niat membeli kembali sebagai variabel konsekuensi (Konsekuensi). Sampel dalam penelitian ini berjumlah 206 responden yang tersebar di Yogyakarta, Jawa Tengah, Jawa Barat, Jawa Timur, Bali, dan Ambon dengan survei yang dilakukan secara terhubung dan tidak terkait. Pengujian hipotesis dilakukan dengan analisis regresi berganda dan analisis regresi sederhana. Hasil penelitian ini menunjukkan bahwa dalam konteks Indonesia, kepuasan pelanggan tidak mempengaruhi tindakan media sosial dan keterlibatan pelanggan memiliki pengaruh positif dan signifikan terhadap tindak tutur elektronik melalui media sosial.Kata Kunci: media sosial, getok tular elektronik, pembelian ulang, regresi

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