Bollettino Di Geofisica Teorica Ed Applicata最新文献_第2页

Investigation of symmetry attribute analysis on the phase measurements of marine controlled-sourceelectromagnetic surveys 海洋可控源电磁测量相位测量对称性属性分析研究

IF 1.2 4区地球科学

Bollettino Di Geofisica Teorica Ed Applicata Pub Date : 2016-01-01 DOI: 10.4430/bgta0183

A. H. H. Ezieke, A. H. Mansi, G. Bernasconi

引用次数: 1

Purported Precursors: Poor Predictors 所谓的先兆:糟糕的预测者

IF 1.2 4区地球科学

Bollettino Di Geofisica Teorica Ed Applicata Pub Date : 2015-06-01 DOI: 10.4430/bgta0142

F. Mulargia, P. Gasperini, B. Lolli, Philip B. Stark

引用次数: 0

Recovery and processing of hydrological and hydrogeochemical parameters for researches on earthquake short-term precursors in Italy 意大利地震短期前兆研究中水文和水文地球化学参数的恢复与处理

IF 1.2 4区地球科学

Bollettino Di Geofisica Teorica Ed Applicata Pub Date : 2015-01-01 DOI: 10.4430/BGTA0147

G.Martinelli Gmartinelli, A. Dadomo, J. Heinicke, F. Italiano, R. Petrini, L. Pierotti, A. Riggio, M. Santulin, F. Slejko, A. Tamaro

引用次数: 3

From visual comparison to robust satellite techniques: 30 years of thermal infrared satellite data analyses for the study of earthquake preparation phases 从目视比较到稳健的卫星技术:用于地震准备阶段研究的30年热红外卫星数据分析

IF 1.2 4区地球科学

Bollettino Di Geofisica Teorica Ed Applicata Pub Date : 2015-01-01 DOI: 10.4430/BGTA0149

V. Tramutoli, R. Corrado, C. Filizzola, N. Genzano, M. Lisi, N. Pergola

引用次数: 46

Integrated interpretation of IP and TEM data for salinity monitoring of aquifers and soil in the coastal area of Muravera (Sardinia, Italy) 意大利撒丁岛Muravera沿海含水层和土壤盐度监测的IP和TEM数据综合解释

IF 1.2 4区地球科学

Bollettino Di Geofisica Teorica Ed Applicata Pub Date : 2015-01-01 DOI: 10.4430/BGTA0136

R. Balia, A. Viezzoli

引用次数: 8

Fault population recognition through microseismicity in Mygdonia region (northern Greece) 利用微震活动识别希腊北部Mygdonia地区断层群

IF 1.2 4区地球科学

Bollettino Di Geofisica Teorica Ed Applicata Pub Date : 2015-01-01 DOI: 10.4430/BGTA0153

Charikleia G. Gkarlaouni, V. Karakostas, A. Kilias, S. Lasocki, E. Papadimitriou

{"title":"Fault population recognition through microseismicity in Mygdonia region (northern Greece)","authors":"Charikleia G. Gkarlaouni, V. Karakostas, A. Kilias, S. Lasocki, E. Papadimitriou","doi":"10.4430/BGTA0153","DOIUrl":"https://doi.org/10.4430/BGTA0153","url":null,"abstract":"Seismicity in the broader area of Mygdonia basin in northern Greece is lately characterized by the absence of strong events along active seismogenic faults known to have been activated in the past. Small to moderate magnitude earthquakes not exceeding ML4.8 have occurred in the last three decades. In this study, earthquakes occurred in 2000 and 2013 and recorded by the Hellenic Seismological network were investigated. Available Pand Sseismic wave arrivals were used for relocation in order to obtain accurately determined earthquake focal coordinates. For this scope, a Wadati diagram was constructed and a Vp/Vs ratio equal to 1.78 as well as time delays were included in the Hypoinverse process for the estimation of the focal coordinates. In the case of strong spatial or temporal clustering among earthquakes, the HypoDD algorithm was also employed for further improving location accuracy. The relocated seismicity was used in order to reveal the structural and geometrical properties of the local fault population and identify seismogenic faults deprived of a clear surface expression. For this reason, cross sections perpendicular to the main axis of the rupture zones were created, and finally a correlation between the kinematic properties and the current stress field was attempted. It is evident that in the absence of strong earthquakes, microseismicity is the only, however fundamental information to be exploited for the identification of active faults and the hazard assessment since small earthquakes are concentrated in areas with a significant potential for a future strong earthquake.","PeriodicalId":50728,"journal":{"name":"Bollettino Di Geofisica Teorica Ed Applicata","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70797984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Was the Mirandola thrust really involved in the Emilia 2012 seismic sequence (northern Italy)? Implications on the likelihood of triggered seismicity effects 米兰多拉逆冲真的与2012年艾米利亚地震序列(意大利北部)有关吗?对触发地震活动效应可能性的影响

IF 1.2 4区地球科学

Bollettino Di Geofisica Teorica Ed Applicata Pub Date : 2015-01-01 DOI: 10.4430/BGTA0162

G. Lavecchia, R. Nardis, G. Costa, L. Tiberi, F. Ferrarini, D. Cirillo, F. Brozzetti, P. Suhadolc

{"title":"Was the Mirandola thrust really involved in the Emilia 2012 seismic sequence (northern Italy)? Implications on the likelihood of triggered seismicity effects","authors":"G. Lavecchia, R. Nardis, G. Costa, L. Tiberi, F. Ferrarini, D. Cirillo, F. Brozzetti, P. Suhadolc","doi":"10.4430/BGTA0162","DOIUrl":"https://doi.org/10.4430/BGTA0162","url":null,"abstract":"We present the results of an interdisciplinary study aimed at defining the geometry of the fault segments activated by the Emilia 2012 thrust sequence (MW up to 6.1), which are located at the front of the Ferrara Arc (northern Italy) and partially overlap with an area undergoing hydrocarbon exploitation since 1980 (Cavone oil field). We relocate 40 well-recorded earthquakes with MW prevailingly ≥4.0 in the time interval from May 20 to June 12, 2012, plus an event that occurred in a nearby area on July 17, 2011 (MW 5.0). The geological and seismotectonic setting of the area is discussed, some interpretative geological sections across the hypocentral volumes are elaborated, and the shape of the identified individual seismogenic fault segments is schematically represented as depth contour lines. The resulting earthquake/fault association highlights a rather complex segmentation pattern, with four neighbouring sources involved, all belonging to the SSW-dipping Ferrara Thrust System. The two main events of the Emilia 2012 sequence did not activate the Mirandola thrust underlying the Cavone reservoir, although this thrust was illuminated by some subsidiary activity mainly concentrated close to the hydrocarbon field. The likelihood of triggered seismicity effects due to the extraction/ injection activities within the Cavone oil field are discussed.","PeriodicalId":50728,"journal":{"name":"Bollettino Di Geofisica Teorica Ed Applicata","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70798133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Seismic hazard from natural and induced seismicity: a comparison for Italy 自然和诱发地震活动的地震危险性:意大利的比较

IF 1.2 4区地球科学

Bollettino Di Geofisica Teorica Ed Applicata Pub Date : 2015-01-01 DOI: 10.4430/BGTA0158

M. Mucciarelli, E. Priolo, M. Santulin, A. Tamaro

引用次数: 4

The Pollino 2011-2012 seismic swarm (southern Italy): First results of the ML=3.6 aftershock recorded by co-located electromagnetic and seismic stations 2011-2012年波里诺地震群(意大利南部):由同一位置的电磁和地震台站记录的ML=3.6级余震的初步结果

IF 1.2 4区地球科学

Bollettino Di Geofisica Teorica Ed Applicata Pub Date : 2015-01-01 DOI: 10.4430/BGTA0138

M. Balasco, V. Lapenna, G. Romano, A. Siniscalchi, T. A. Stabile, L. Telesca

引用次数: 11

The importance of the Vp/Vs ratio in determining the error propagation, the stability and the resolution of linear AVA inversion: A theoretical demonstration Vp/Vs比值在决定线性AVA反演误差传播、稳定性和分辨率中的重要性:一个理论论证

IF 1.2 4区地球科学

Bollettino Di Geofisica Teorica Ed Applicata Pub Date : 2015-01-01 DOI: 10.4430/BGTA0156

M. Aleardi

{"title":"The importance of the Vp/Vs ratio in determining the error propagation, the stability and the resolution of linear AVA inversion: A theoretical demonstration","authors":"M. Aleardi","doi":"10.4430/BGTA0156","DOIUrl":"https://doi.org/10.4430/BGTA0156","url":null,"abstract":"The linear Amplitude-Versus-Angle (AVA) inversion has become a standard tool in deep-sediments hydrocarbon exploration since its introduction in the oil and gas industry. However, in the last decades, with the increase of offshore construction activity, applications of this method have been also extended to predict overpressured zones and/or to evaluate the geotechnical properties of shallow sea bottom layers. Among the input parameters requested by linear AVA inversion there is the background Vp/Vs ratio across the reflecting interface and a Vp/Vs ratio of two is frequently assumed. This value is usually very close to the true ratio in case of deep, compacted sediments but it can be a gross underestimation of the true value in case of shallow or overpressured sediments. Despite that, the importance of the background Vp/Vs ratio in AVA inversion is frequently underrated and thus I consider two frequently used approximations of the Zoeppritz equations to study their impact on the outcomes of linear AVA inversion: the three-term Aki and Richards equation and the two-term Ursenbach and Stewart formula. These equations are then analysed, varying the Vp/ Vs value, using tools frequently applied in sensitivity analysis. It turns out that the background Vp/Vs ratio controls the error propagation from data to model space and determines the cross-talk between the inverted parameters. Moreover, an increasing Vp/Vs ratio causes a decrease of stability of the AVA inversion and worsens the estimate of the Vs contrast at the reflecting interface.","PeriodicalId":50728,"journal":{"name":"Bollettino Di Geofisica Teorica Ed Applicata","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70798025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14