scholarly journals Evolution and strengthening of the Calabrian Regional Seismic Network

2013 ◽  
Vol 36 ◽  
pp. 11-16 ◽  
Author(s):  
A. D'Alessandro ◽  
A. Gervasi ◽  
I. Guerra

Abstract. The Calabrian Arc is an area of high seismic hazard, in the past often affected by destructive earthquakes. The seismicity of the Calabrian region is monitored by the Italian National Seismic Network integrated by the Calabrian Regional one and, in the last three years, by the Pollino temporary array. We have applied the Seismic Network Evaluation through Simulation to assess the individual contribution of each network in locating earthquakes with epicentres in the Calabrian region and surrounding. We shows that the Calabrian Regional Seismic Network greatly improves the quality of the coverage in almost the Calabria territory except in the Crotone Basin, in the Serre and in the offshore areas. We show that the contribution of the Pollino temporary array is instead restricted to a very small area centred on the Pollino Chain. Due to the presence in the Serre of important seismogenic volumes, which in the past have generated destructive earthquakes, it would be opportune to add at least several seismic stations in this area and surrounding to improve the seismic monitoring.

Author(s):  
Musavver Didem Cambaz ◽  
Mehmet Özer ◽  
Yavuz Güneş ◽  
Tuğçe Ergün ◽  
Zafer Öğütcü ◽  
...  

Abstract As the earliest institute in Turkey dedicated to locating, recording, and archiving earthquakes in the region, the Kandilli Observatory and Earthquake Research Institute (KOERI) has a long history in seismic observation, which dates back to the installation of its first seismometers soon after the devastating Istanbul earthquake of 10 July 1894. For over a century, since the deployment of its first seismometer, the KOERI seismic network has grown steadily in time. In this article, we present the KOERI seismic network facilities as a data center for the seismological community, providing data and services through the European Integrated Data Archive (EIDA) and the Rapid Raw Strong-Motion (RRSM) database, both integrated in the Observatories and Research Facilities for European Seismology (ORFEUS). The objective of this article is to provide an overview of the KOERI seismic services within ORFEUS and to introduce some of the procedures that allow to check the health of the seismic network and the quality of the data recorded at KOERI seismic stations, which are shared through EIDA and RRSM.


2019 ◽  
Vol 91 (2A) ◽  
pp. 660-676 ◽  
Author(s):  
John E. Ebel ◽  
Martin C. Chapman ◽  
Won-Young Kim ◽  
Mitchell Withers

Abstract The central and eastern United States (CEUS) is an area of generally low-to-moderate seismic hazard with a number of large cities with high seismic risk, a history of occasional damaging earthquakes, and seismic activity induced by wastewater disposal. Seismic monitoring in the CEUS, which began at the beginning 1900s, has undergone many changes through time. Over the past two decades, broadband digital seismic stations connected by internet communications have become widespread. Modern data processing systems to automatically locate earthquakes and assign event magnitudes in near-real time have become the norm, and, since the inception of the Advanced National Seismic System in 2000, more than 10,000 earthquakes have been located and cataloged. Continuously recorded digital seismic data at 100 samples per second are allowing new avenues of research into earthquake source parameters, ground-motion excitation, and seismic wave propagation. Unfortunately, over the past two decades the number of regional seismic network (RSN) centers has diminished due to consolidations and terminations, as funding has tightened. Nevertheless, the public in different parts of the CEUS still looks to local experts for information when earthquakes take place or when they have questions about earthquakes and seismic hazard. The current RSNs must evolve to encompass the need for local seismic information centers and to serve the needs of present and future research into the causes and effects of CEUS earthquakes.


2014 ◽  
Vol 36 ◽  
pp. 61-67
Author(s):  
D. Pesaresi ◽  
M. Romanelli ◽  
C. Barnaba ◽  
P. L. Bragato ◽  
G. Durì

Abstract. The Centro di Ricerche Sismologiche (CRS, Seismological Research Centre) of the Istituto Nazionale di Oceanografia e di Geofisica Sperimentale (OGS, Italian National Institute for Oceanography and Experimental Geophysics) in Udine (Italy) after the strong earthquake of magnitude M=6.4 occurred in 1976 in the Italian Friuli-Venezia Giulia region, started to operate the North-eastern Italy Seismic Network: it currently consists of 17 very sensitive broad band and 18 simpler short period seismic stations, all telemetered to and acquired in real time at the OGS-CRS data centre in Udine. Real time data exchange agreements in place with other Italian, Slovenian, Austrian and Swiss seismological institutes lead to a total number of about 100 seismic stations acquired in real time, which makes the OGS the reference institute for seismic monitoring of North-eastern Italy. The south-western edge of the OGS seismic network (Fig. 1) stands on the Po alluvial basin: earthquake localization and characterization in this area is affected by the presence of soft alluvial deposits. OGS ha already experience in running a local seismic network in high noise conditions making use of borehole installations in the case of the micro-seismicity monitoring of a local gas storage site for a private company. Following the ML = 5.9 earthquake that struck the Emilia region around Ferrara in Northern Italy on 20 May 2012 at 02:03:53 UTC, a cooperation of Istituto Nazionale di Geofisica e Vulcanologia, OGS, the Comune di Ferrara and the University of Ferrara lead to the reinstallation of a previously existing very broad band (VBB) borehole seismic station in Ferrara. The aim of the OGS intervention was on one hand to extend its real time seismic monitoring capabilities toward South-West, including Ferrara and its surroundings, and on the other hand to evaluate the seismic response at the site. We will describe improvements in running the North-eastern Italy Seismic Network, including details of the Ferrara VBB borehole station configuration and installation, with first results.


2021 ◽  
Author(s):  
Pauline Galea ◽  
Matthew Agius ◽  
George Bozionelos ◽  
Sebastiano D'Amico ◽  
Daniela Farrugia

<p>The Maltese islands are a small country 15 km wide by 30 km long located about 100 km south of Sicily, Italy. Since 2015 Malta has set up a national seismic network. The primary aim of this network is to monitor in real-time and to locate more accurately the seismicity close to the islands and the seismicity in the Sicily Channel, offshore between Sicily, Tunisia and Libya. This Channel presents a range of interesting and complex tectonic processes that have developed in response to various regional stress fields mainly as a result of the collision between the African plate with Europe. The Maltese islands are known to have been affected by a number of earthquakes originating in the Channel, with some of these events estimated to be very close to the islands.</p><p>The seismotectonic characteristics of the Sicily channel, particularly south of the Maltese islands, is not well understood. This situation is being partially addressed through an increase in the number of seismic stations on the Maltese archipelago. The Malta Seismic Network (FDSN code ML), managed by the Seismic Monitoring and Research Group, within the Department of Geosciences, University of Malta, currently comprises 8 broadband, 3-component stations over an area slightly exceeding 300 km<sup>2</sup>. We present a technical description of the MSN including quality control tests such as spectral analysis (Power Spectral Density and HVSR), station orientations and timings as well as examples of local and regional earthquakes recorded on the network. We describe the upgrades to real-time data transmission and archiving, and automated epicentre location for continuous seismic monitoring using the local network amalgamated with a virtual seismic network to monitor the seismicity in the extended Mediterranean region. Such a dense national network, besides improving epicentral location in the Sicily Channel, is providing valuable information on microearthquake activity known to occur in close proximity to the islands, which has been very difficult to study in the past. It also provides an important tool for analysing site response and site amplification related to underlying geology, which constitutes a major component of seismic hazard analysis on the islands. Furthermore, the increase in seismic stations to the seismic monitoring system provides more robust earthquake estimates for the tsunami monitoring/simulation system.</p><p>Funding for stations was provided by Interreg Italia-Malta projects (SIMIT and SIMIT-THARSY, Codes B1-2.19/11 and C1-3.2-57) and by Transport Malta.</p>


2014 ◽  
Vol 45 (1) ◽  
pp. 61-71
Author(s):  
Heather Macdonald ◽  
David M. Goodman ◽  
Katie Howe

Abstract Many philosophers have argued that psychological time is a fundamental, inherent quality of consciousness that provides continuity and sequence to mental events—enabling memory. And, since memory is consciousness, psychological time enables the individual intentionality of consciousness. Levinas (1961), on the other hand, argues that an individual’s past, in the most original sense, is the past of other. The irreducible alterity of one’s past sets the stage for the other who co-determines the meaning of the past. This paper is about the exploration cultural memory within the context of a Caucasian doctoral student entering into an African-American community during an internship, who finds that cultural memories are remarkably more complicated than the propositional description of historic events. The paper further explores how cultural memory is not a record of “what happened” but a sociolinguistic creative meaning making process. Histories can be contested. Memory, on the other hand, never adheres to the strict true or false dichotomy. Memory is like searching for the Divine, it cannot be found, only revealed in mysterious and small details. Memory, is the intruding of the infinite, creating as an effect the idea of a finite (August, 2011), they are not “representations” of the past nor are they a kind of mnemonic system of subjectivism to mediate all of consciousness.


2018 ◽  
Vol 6 (3) ◽  
pp. 454 ◽  
Author(s):  
Mathew Mercuri ◽  
Amiram Gafni

Over the past few decades the medical literature has given much attention to three movements: Evidence Based Medicine (EBM), Person Centered Medicine (PCM) and Small Area Variations (SAV).  Each claims to provide a framework for improving the care of individual patients. This paper examines why attention to the individual patient is important in the provision and delivery of healthcare and how each of these movements seek to address individual patient needs. We suggest that EBM, PCM and SAV all suffer from a number of issues that render their use as a framework to address individual patient needs inadequate. In the case of EBM, it is a reliance on (at best) population level study (e.g., clinical trials) that do not necessarily translate to individual patients. PCM appears to recognize the information requirements to care for individual patients, but is unclear on how that information can be obtained. Likewise, SAV is limited in that its methods do not discriminate between warranted and unwarranted variation and its reliance on the EBM approach in assessing what is the correct treatment for patients. This paper concludes that EBM, PCM and SAV are not solving the problem of how to provide care for individual patients. While we do not offer a solution here, it is only when we admit we do not have the answers to this problem that we can begin to look for a solution.


2013 ◽  
Vol 34 ◽  
pp. 1-4 ◽  
Author(s):  
D. Pesaresi ◽  
F. Vernon

Abstract. The number and quality of seismic stations and networks in Europe continually improves, nevertheless there is always scope to optimize their performance. In this session we welcome contributions from all aspects of seismic network installation, operation and management. This includes site selection; equipment testing and installation; planning and implementing communication paths; policies for redundancy in data acquisition, processing and archiving; and integration of different datasets including GPS and OBS.


2019 ◽  
Vol 9 (1) ◽  
pp. 1-22
Author(s):  
Fathurrahman Muhtar

Penelitian ini bertujuan untuk menjawab isu pokok didalam pengelolaan konflik kelembagaan pendidikan Islam pada Pondok Pesantren Nahd}atul Wat}an mengenai: sumber otoritas dan otoritas dalam mengatur institusi bidang pendidikan Islam di Pesantren Nahd} atul Wat}an Lombok Timur NTB, dan penyebab konflik dalam lembaga tersebut. Untuk menjawab pertanyaan pokok tersebut adalah dengan menggunakan teori non-Marxist-structuralis sebagai alat analisa untuk menjawab permasalahan di atas. Diantara teori lainnya, dikemukakan oleh Ralf Dahrendorf, yang menyatakan bahwa masyarakat dipersatukan oleh suatu ketiadaan kebebasan. Posisi tertentu di dalam masyarakat untuk mendelegasikan kekuasaan dan otoritas ke posisi lainnya, perbedaan di dalam distribusi otoritas tersebut dapat menjadi faktor perbedaan dari sistematis konflik sosial. Berbagai posisi di dalam masyarakat mempunyai mutu dari perbedaan otoritas. Otoritas tersebut tidak terlepas pada individu itu sendiri namun didalam posisi riset ini menggunakan suatu pendekatan kualitatif, data diperoleh melalui wawancara mendalam (indepth-interview), pengamatan dan dokumentasi, kemudian menafsirkan, atau menterjemahkan kedalam bahasa peneliti. Data ini untuk menghasilkan dan menguraikan berbagai kondisi dan situasi yang tidak satupun terlepas dari obyek penelitian, dan menghubungkan sejumlah variabel, dan uraian lebih lanjut yang akan dihasilkan obyek riset, untuk memperoleh kesimpulan. Studi ini mengemukakan bahwa besar kecilnya kesuksesan suatu organisiation mengacu pada petunjuk dimasa lalu atau 12 tahun yang lalu telah dibangun 820 sekolah di Kelompok Pancor atau 900 sekolah di Kelompok Anjani di seluruh provinsi Nusa Tenggara Barat. Abstrak: This research is to answer fundamental issues in conflict management institutions of Islamic education in Pondok Pesantren Nahd}atul Wat}an namely: first,. source of authority and authority in managing the praxis of Islamic educational institutions in boarding Nahdlatul Wathan East Lombok NTB causes of conflict and management of educational institutions that are in conflict Nahd}atul Wat}an. To answer the key question is, non-Marxist-structuralist theory as a tool of analysis used in answering the above problems. Theory, among others, presented by Ralf Dahrendorf, who stated that the society united by a lack of freedom imposed. Certain position in society to delegate power and authority to another position, the difference in the distribution of authority becomes the determining factor of social conflict sistemati. Various positions in the community have the quality of different authorities. Authority does not lie inside the individual but in the position of this research uses a qualitative approach, data obtained from in-depth interviews (indepthinterview), observation and documentation, then interpreted, or translated to language researchers. These data to generate and describe the various conditions and situations none of the research object, and connecting these variables, and further description will be generated about the object of research, then the conclusions will be obtained. Our study argues that the organisiation has somewhat succeeded in moving toward the latter direction so much so that in the past 12 years or so it has built 820 schools according to Pancor group or 900 schools according to Anjani group across the provinse of Nusa Tenggara Barat.


2013 ◽  
Vol 36 ◽  
pp. 1-5 ◽  
Author(s):  
D. Pesaresi ◽  
R. Busby

Abstract. The number and quality of seismic stations and networks in Europe continually improves, nevertheless there is always scope to optimize their performance. In this session we welcomed contributions from all aspects of seismic network installation, operation and management. This includes site selection; equipment testing and installation; planning and implementing communication paths; policies for redundancy in data acquisition, processing and archiving; and integration of different datasets including GPS and OBS.


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