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  • 1
    Electronic Resource
    Electronic Resource
    The microseismic network of the Ridracoli Dam, North Italy: Data and interpretations (1995)
    Springer
    Pure and applied geophysics 145 (1995), S. 97-108 
    Details
    ISSN: 1420-9136
    Keywords: Microseismic ; reservoir-induced seismicity ; nonparametric correlation analysis ; b values
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The Ridracoli Dam has been operating since 1981. Around the reservoir ISMES installed and operated for 10 years a seismic network, now reduced to a 3-D station. Earthquakes were recorded with completeness from magnitude 0.8 onwards. In the same period, all the parameters relevant to the dam and the environment were measured. This provided a complete data base for RIS studies, unique in its kind in Italy. The main findings of the analyses performed are the following: 1) The filling of the reservoir has not influenced the seismicity of the area for most significant events (M L〉3.5). 2) Lesser seismicity around the reservoir seems to be correlated with water level in the reservoir, but also shows to be dependent on regional seismicity. 3) b value shows a slight increase with time. This may indicate an increase in rock fracturing, which is known to precede the disappearing of Type II RIS.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00879486
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  • 2
    Electronic Resource
    Electronic Resource
    Macroseismic estimates of magnitude in Italy (1995)
    Springer
    Pure and applied geophysics 145 (1995), S. 297-312 
    Details
    ISSN: 1420-9136
    Keywords: Magnitude ; intensity ; seismic hazard ; Italy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A multi-parametric study of empirical relationships between macroseismic data and magnitude is presented for the Italian region by the analysis of a new extended data set concerning 146 earthquakes. The available magnitude determinations include all of the most intense earthquakes which occurred in Italy in the last century and have been obtained by an accurate revision of original instrumental data. Intensity data have been revised and upgraded on the basis of the most recent studies: only local intensities directly documented have been used. Macroseismic determinations ofM s ,m B andM wa magnitudes have been performed. The empirical relationships between maximum felt intensity (I max ) and magnitude have been determined by the use of a distribution-free approach and a linear regression analysis. This last parameterization allows for the explanation of more than 60% of the variation in magnitude. In order to improve these results, the linear dependence between magnitude,I max and average distances (in logarithm) corresponding to fixed attenuation values has been explored. The comparison between instrumental magnitudes and corresponding macroseismic estimates obtained from empirical relationships shows that the respective uncertainties are comparable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00880272
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  • 3
    Electronic Resource
    Electronic Resource
    Essential oils from Achillea species of different geographic origin
    Amsterdam : Elsevier
    Biochemical Systematics and Ecology 22 (1994), S. 679-687 
    Details
    ISSN: 0305-1978
    Keywords: Achillea species ; Asteraceae ; GC-MS ; Principal Component Analysis ; essential oil
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0305-1978(94)90054-X
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  • 4
    Electronic Resource
    Electronic Resource
    Environmental factors affecting the lipid metabolism in Rosmarinus officinalis L
    Amsterdam : Elsevier
    Biochemical Systematics and Ecology 21 (1993), S. 765-784 
    Details
    ISSN: 0305-1978
    Keywords: Labiatae ; Rosmarinus officinalis L. ; epicuticular fatty acids ; epicuticular hydrocarbons ; essential oils ; moisture ; temperature ; whole leaf fatty acids
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0305-1978(93)90089-A
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  • 5
    Electronic Resource
    Electronic Resource
    Seismic activity in North Aegean region as middle-term precursor of Calabrian earthquakes
    Amsterdam : Elsevier
    Physics of the Earth and Planetary Interiors 44 (1986), S. 264-273 
    Details
    ISSN: 0031-9201
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0031-9201(86)90075-0
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  • 6
    Electronic Resource
    Electronic Resource
    Evidence of interrelation between the seismicity of the Southern Apennines and Southern Dinarides
    Amsterdam : Elsevier
    Physics of the Earth and Planetary Interiors 49 (1987), S. 259-263 
    Details
    ISSN: 0031-9201
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0031-9201(87)90028-8
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  • 7
    Electronic Resource
    Electronic Resource
    Evidence of interconnection between seismic activity in the Iberian Peninsula and North African belts
    Amsterdam : Elsevier
    Physics of the Earth and Planetary Interiors 54 (1989), S. 116-119 
    Details
    ISSN: 0031-9201
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0031-9201(89)90191-X
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  • 8
    Electronic Resource
    Electronic Resource
    The seismic history of Catania (1999)
    Springer
    Journal of seismology 3 (1999), S. 235-252 
    Details
    ISSN: 1573-157X
    Keywords: Catania ; damage ; earthquakes ; eastern Sicily ; history ; macroseismics ; seismic hazard ; seismic risk
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A detailed study of the most significant seismic effects that took place in the city of Catania has been performed in order to build up a site catalogue, to assess seismic hazard directly from it and to provide the picture of damage scenarios which happened in the past. In the last 1000 years Catania was destroyed twice (1169 and 1693) and more or less severely damaged twelve times (e.g., 1542, 1818, 1848, etc.). Destruction or severe damage are mainly related to earthquakes occurring in the coastal sector of the Hyblean foreland, while slighter, moderate effects are usually due to earthquakes taking place in the seismogenic sources of the Messina Straits and in the inner Hyblean region. The analysis of the historical reports allowed to delineate the damage scenarios of the most relevant events. In particular, for the 1693 case-history it has also been possible to map the damage distribution with reference to the existing urban settlement of the city. The site catalogue was used for assessing seismic hazard; the obtained estimates show that the probability of occurrence for intensity 7 and 10 exceeds 99.9% for 150 and 500 years, respectively. These values, associated with the high vulnerability caused by the city growth which occurred mainly before the introduction of the seismic code (1981) and without ad-hoc planning policies, implies that the urban system is exposed to high seismic risk.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009818313629
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  • 9
    Electronic Resource
    Electronic Resource
    Effects of 3,4-dihydroxybenzoic acid on root membrane potential in micropropagated tobacco plants (2000)
    Springer
    Plant cell, tissue and organ culture 62 (2000), S. 3-10 
    Details
    ISSN: 1573-5044
    Keywords: auxin-like activity ; benzoic acid ; micropropagated plants ; root segments ; transmembrane potential
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In order to understand the mechanism of action of the phenolic compound 3,4-dihydroxybenzoic acid, we tested its effect on tobacco root membrane potential. Tobacco root segments, excised from micropropagated plants grown in liquid media, were perfused with 0.1–5 mM 3,4-dihydroxybenzoic acid. Activity on the plasma membrane potential was compared with that obtained after perfusion with 0.05 mM indole-3-acetic acid, 0.05 mM kinetin and 0.05 mM gibberellic acid. Possible interactions between 3,4-dihydroxybenzoic acid and plant growth regulators were evaluated by the means of successive applications. When applied to tobacco root segments, 3,4-dihydroxybenzoic acid elicited a transient membrane depolarization. The membrane depolarization induced by 3,4-dihydroxybenzoic acid was followed by a repolarization phase, as for auxin applications. In roots preconditioned with the other growth regulators, the activity of 3,4-dihydroxybenzoic acid on membrane potential was non-specifically affected. In roots preconditioned with 3,4-dihydroxybenzoic acid, indole-3-acetic acid activity on cell membrane was altered, suggesting a specific reciprocal interaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006490924368
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  • 10
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    Aseismic transient driving the swarm-like seismic sequence in the Pollino range, Southern Italy (2015)
    Oxford University Press
    Details
    Publication Date: 2015-04-12
    Description: Tectonic earthquake swarms challenge our understanding of earthquake processes since it is difficult to link observations to the underlying physical mechanisms and to assess the hazard they pose. Transient forcing is thought to initiate and drive the spatio-temporal release of energy during swarms. The nature of the transient forcing may vary across sequences and range from aseismic creeping or transient slip to diffusion of pore pressure pulses to fluid redistribution and migration within the seismogenic crust. Distinguishing between such forcing mechanisms may be critical to reduce epistemic uncertainties in the assessment of hazard due to seismic swarms, because it can provide information on the frequency–magnitude distribution of the earthquakes (often deviating from the assumed Gutenberg–Richter relation) and on the expected source parameters influencing the ground motion (for example the stress drop). Here we study the ongoing Pollino range (Southern Italy) seismic swarm, a long-lasting seismic sequence with more than five thousand events recorded and located since October 2010. The two largest shocks (magnitude M w = 4.2 and M w = 5.1) are among the largest earthquakes ever recorded in an area which represents a seismic gap in the Italian historical earthquake catalogue. We investigate the geometrical, mechanical and statistical characteristics of the largest earthquakes and of the entire swarm. We calculate the focal mechanisms of the M l 〉 3 events in the sequence and the transfer of Coulomb stress on nearby known faults and analyse the statistics of the earthquake catalogue. We find that only 25 per cent of the earthquakes in the sequence can be explained as aftershocks, and the remaining 75 per cent may be attributed to a transient forcing. The b -values change in time throughout the sequence, with low b -values correlated with the period of highest rate of activity and with the occurrence of the largest shock. In the light of recent studies on the palaeoseismic and historical activity in the Pollino area, we identify two scenarios consistent with the observations and our analysis: This and past seismic swarms may have been ‘passive’ features, with small fault patches failing on largely locked faults, or may have been accompanied by an ‘active’, largely aseismic, release of a large portion of the accumulated tectonic strain. Those scenarios have very different implications for the seismic hazard of the area.
    Keywords: Seismology
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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