Reservoir-induced earthquakes at Sainte-Marguerite-3, Quebec, Canada

2006 ◽  
Vol 43 (2) ◽  
pp. 135-146 ◽  
Author(s):  
Maurice Lamontagne ◽  
Yousef Hammamji ◽  
Jean-Pierre Tournier ◽  
Catherine Woodgold
Keyword(s):  
Field Survey ◽  
Hazard Evaluation ◽  
Induced Earthquakes ◽  
Hydroelectric Project ◽  
Single Station ◽  
Dam Site ◽  
Design Earthquake ◽  
Seismic Hazard Evaluation ◽  
Seismic Area ◽  
The Town

Located some 90 km north of the town of Sept-Îles, Quebec, the Sainte-Marguerite-3 (SM-3) hydroelectric project was one of the most ambitious in eastern North America in recent years. The project included the construction of a 171 m high dam that created a 140 km long reservoir, some 120 m deep near the dam toe. Although the reservoir is located in a weakly seismic area of the Canadian Shield, reservoir-induced earthquakes occurred. A first event (mN 1.3) was recorded in September 1999, ~17 months after the reservoir started filling. Between October 2000 and March 2001, four additional events were detected by the Canadian National Seismograph Network, the largest being mN 1.7. During a field survey that took place between July and October 2001, 276 events of magnitude mN ≤ 1.2 were detected within 30 km of a three-component seismograph. Single-station locations, confirmed by agreement between P phase and S phase azimuths, were determined for 182 events. Most earthquakes fall in four areas with estimated focal depths mostly shallower than 2 km. Since the field survey completion, more events have taken place, but the largest one is mN 2.2 as of March 2006. This paper presents a detailed analysis of the reservoir-triggered events, together with a summary of seismic hazard evaluation of the dam site, the seismic parameters selected for dynamic analysis, and the selection of the design earthquake.

scholarly journals Revision of the 1844 Palestrina earthquake following the recovery of an unpublished document

1998 ◽  
Vol 41 (4) ◽  
Author(s):  
A. Tertulliani ◽  
S. Del Mese ◽  
R. Di Giovambattista ◽  
M. Pirro
Keyword(s):  
Seismic Vulnerability ◽  
Strong Dependence ◽  
Central Italy ◽  
Hazard Evaluation ◽  
Damage Level ◽  
Lack Of Information ◽  
Realistic View ◽  
Seismic Hazard Evaluation ◽  
The City ◽  
The Town

The paper presented originates from the recovery of an unpublished document that reports estimated damage in the city of Palestrina (Central Italy) following the 1844 earthquake. This document is not quoted in the sources and repertoires concerning earthquakes in the Palestrina area, and it has probably never before been used in studies for seismic hazard evaluation. Analysis of the document has allowed us to state the distribution and severity of damage due to the seismic event, assessing an intensity of VII MCS for Palestrina. Comparison with other coeval documents evidenced a possible lack of information with respect to the dwellings of the less well-to-do population, granting the hypothesis of a more serious damage level. The distribution of effects within the town centre of Palestrina has been compared with the surficial geology, evidencing a strong dependence of the seismic response on the local geomorphology. Such results are also confirmed by a similar damage pattern following the 1876 earthquake, and allow us to outline a realistic view of Palestrina's seismic vulnerability.

scholarly journals Silver ore exploration in the Southern Urals

2020 ◽  
pp. 110-119
Author(s):  
Evgenii A. Kurlaev ◽  
Keyword(s):  
Field Survey ◽  
Southern Urals ◽  
17Th Century ◽  
Geological Survey ◽  
The Southern Urals ◽  
Mining Areas ◽  
Sequence Of Events ◽  
History Of ◽  
The Town ◽  
Ore Exploration

Introduction. Native historiography associates the beginning of Southern Ural industrialization with the construction of first metallurgical works in the 1740s. Historians paid attention to geological exploration in the Urals in the 17th century but they had no idea about the survey areas. Historical archeological study on the edge of the town of Zlatoust in the Southern Urals has managed to find the trace of the largest geological survey expedition aimed at silver ore exploration as far back as 1669–1673. Expedition at that time represented a major military autonomous formation (regiment) under a voivode’s (Slavic title for a war-leader) command. A large number of participants was due to the need for great manpower and protection from hostile nomads Research aim is to introduce unique discoveries in the history of mining into professional scientific use. Methodology. When analyzing the historical material, the methods of field survey and investigation on the documents of ancient mining remains have been developed. Results. The sequence of events has been retraced in the article, geological survey and mining areas and stages have been determined. Organizational structure, quantity, aims and results of the largest geological survey expedition in the history of Russia have been defined. Mining traces have been discovered being a unique monument to the history of mining in the 17th century.

The ISC Electronic Archive of Printed Station and Network Bulletins

2021 ◽  
Author(s):  
Domenico Di Giacomo ◽  
Daniela Olaru ◽  
Adrian Armstrong ◽  
James Harris ◽  
Dmitry A. Storchak
Keyword(s):  
Electronic Archive ◽  
The Past ◽  
Single Station ◽  
International Seismological Centre ◽  
The Town ◽  
Wide Community

Abstract We present an archive of scanned instrumental seismic bulletins pertaining to either a single station or a set of stations (network). This new service by the International Seismological Centre (ISC), called the ISC Electronic Archive of Station and Network Bulletins, is openly available at the ISC website. The archive is likely to be the most comprehensive to date, thanks to the collection from various sources done by the ISC in the past several decades. The search for scans of a seismic bulletin is based on the location of the town of the institution producing a bulletin. As such, the electronic archive is easy to use and is likely to facilitate the work of a wide community interested in studying past earthquakes and involved in preservation and digitization of analog recordings.

ULVS XXVI: Sedimentological and Palynological Studies of Holocene Environmental Changes from a Plateau Basin Infill Sequence at Grerat D'nar Salem, near Beni Ulid, in the Tripolitanian Pre-desert

1993 ◽  
Vol 24 ◽  
pp. 1-18 ◽  
Author(s):  
D. D. Gilbertson ◽  
C. O. Hunt ◽  
N. R. J. Fieller
Keyword(s):  
Environmental Change ◽  
Field Survey ◽  
Environmental Changes ◽  
Archaeological Remains ◽  
Shrub Species ◽  
North West ◽  
Naturally Occurring ◽  
Modern Landscape ◽  
Early And Middle Holocene ◽  
The Town

AbstractThis paper describes an integrated series of sedimentological and palynological studies of the arenaceous deposits which infill the large alluvial basin of Grerat D'nar Salem, which is located on a limestone plateau in the semi-arid pre-desert of Tripolitania north-west of the town of Beni Ulid. This research shows that in the early and middle Holocene this depression was occupied by a large semi-permanent or permanent water body which was surrounded by a grass-steppe vegetation with some tree and shrub species, perhaps growing in wetter stream- and wadi-beds. Sometime in the mid-Holocene the region became much more arid, the lake disappeared, matching the pattern of environmental change observed elsewhere in northern Africa. The geomor-phic environment became dominated by aeolian processes, interrupted by occasional winter floods, in a landscape dominated by grass steppe — essentially the situation that has continued to the present day. It is clear from general biogeographical and geomorphic considerations that Romano-Libyan floodwater farming in the region must have brought about significant changes in the character of wadi floors. Field survey indicates that it has also left a legacy in the contemporary distribution of plants, animals and runoff in the modern landscape. Nevertheless, no clear evidence has emerged from this study that the widespread and intensive flood-water farming, evidenced by the archaeological remains in the area, was associated with either a climate or a landscape notably different from that of today. The new palynological evidence suggests that the nature of the related ancient cultivation at Grerat is better viewed as a monoculture, rather than the mixed farming deduced previously for wadi-floor areas. There is no evidence that any naturally-occurring environmental change was associated with the introduction or loss of floodwater farming in the region. There is some sedimentological evidence that such activity might have led to problems of soil salinity in this basin.

Influence of the proposed Site C hydroelectric project on the ice regime of the Peace River

2015 ◽  
Vol 42 (9) ◽  
pp. 645-655 ◽  
Author(s):  
Martin Jasek ◽  
Amy Pryse-Phillips
Keyword(s):  
Clean Energy ◽  
Ice Cover ◽  
Water Levels ◽  
River Ice ◽  
Hydroelectric Project ◽  
Peace River ◽  
Ice Conditions ◽  
Break Up ◽  
Hydro Project ◽  
The Town

The objectives of the study were to describe the existing ice conditions in the Peace River and to predict changes as a result of the proposed Site C Clean Energy Project (the Project). The analyses of changes due to the Project were conducted using the CRISSP and PRTIGM models. Sixteen winters were simulated to provide a representative range of meteorological conditions on which to base the conclusions of the study. Potential changes are described in terms of the following ice characteristics: maximum upstream extent of ice cover; timing of ice cover formation and break-up; freeze-up and break-up water levels at the Town of Peace River; ice thickness; changes in ice conditions relevant for river ice crossings. The analyses also included predicting changes in these ice characteristics due to the combined influence of the Project and the proposed Dunvegan Hydro Project in Alberta. Two future climate scenarios were also considered.

Seismic Hazard Evaluation Using Markov Chains: Application to the Japan Area

2005 ◽  
Vol 162 (6-7) ◽  
pp. 1347-1366 ◽  
Author(s):  
F. Alejandro Nava ◽  
Claudia Herrera ◽  
José Frez ◽  
Ewa Glowacka
Keyword(s):  
Markov Chains ◽  
Seismic Hazard ◽  
Hazard Evaluation ◽  
Seismic Hazard Evaluation
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