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On a local hidden-variable model with unusual properties
No full textThe paper shows that is possible to violate the Bell Inequality with simple ondulatory modelsPublished16-18ope
THE 23 NOVEMBER 1980 SOUTHERN ITALY EARTHQUAKE
No full textThe seismic activity associated with the catastrophic southern Italy earth- quake was monitored by 11 seismic stations operating before this event, within an epicentral distance of 200 km, and by 32 additional short-period seismom- eters installed soon after the main shock. The hypocenter of this event was located at 40°46'N and 15°18'E, at 16 km depth. The fault-plane solution reveals normal faulting, with tensile axis dipping 18 ° and oriented orthogonal to the axis of the Apennines chain. This mechanism is in good agreement with the stress pattern inferred from some previous earthquakes and the local seismotectonics.
The hypocenter locations of more than 600 aftershocks, with local magnitudes greater than 2.4, show a pronounced alignment extending for about 70 km, oriented north 120 ° and scattered laterally less than 15 km. These events are mostly concentrated between 8 and 16 km depth. A cluster of aftershocks occurred close to the hypocenter of the main shock covering a region elongated 25 km which corresponds also to the highly damaged area. No significant spreading of the aftershock area with time is observed, but one of the events with higher magnitude (M, = 4.8, 14 February 1981) is displaced 20 km NW from the tip of the aftershock region. The time evolution of the number of aftershocks fits well Omorrs hyperbolic law with a decay coeffcient of 1.07 __. 0.06.
The possibility of a future delayed multiple sequence of large events, as already observed in the past along the central and southern Apennines, is discussed. In particular, a relatively high seismic potential seems to exist along the northern boundary of the 1980 rupture segment.Published187-2003.1. Fisica dei terremotiJCR Journalreserve
SEISMIC CODA-Q AND SCALING LAW OF THE SOURCE SPECTRA AT THE AEOLIAN ISLANDS, SOUTHERN ITALY
No full textThe model developed by Aki and Chouet for the coda wave generation and propagation has been used to calculate the quality factor Q for the zone of the Aeolian Islands, southern Italy, in the frequency range of 1 to 12 Hz, and the scaling properties of the seismic spectrum in the magnitude range of 0.4 to 4.7.
The Q found for the Aeolian area has a frequency dependence of the form Q = qf v. The absolute values of Q seem to be dependent on the station and location of the seismic events, confirming the strong lateral heterogeneities in the geological structure beneath the Aeolian Arc. A temporal variation has been noted in the Q calculated at Vulcano station (VPL) in a period of 3 weeks soon
after the occurrence of a main shock of M, -- 5.5 located near the station. The scaling behavior of this sequence is similar to that obtained in two areas of California and one portion of Japan, with a corner frequency that remains constant with an increasing seismic moment between magnitudes 1 and 4. It differs substantially from the scaling properties of the Hawaian earthquakes that show a linear pattern, without an increase of the stress drop with magnitude. The fact that Vulcano is an active volcano seems not to influence the scaling properties of the seismic sequence localized very near it. It probably indicates that the aftershocks used for calculating the scaling law are generated out of the volcanic complex Lipari-Vulcano, in a zone with a good capability of accu-
mulating the stress.Published97-1083.1. Fisica dei terremotiJCR Journalreserve
Indagine di sismica passiva all'isola di Thera, Grecia
No full textIn the textOsservatorio VesuvianoPublished1.4. TTC - Sorveglianza sismologica delle aree vulcaniche attiveope
On local causality and the quantum-mechanical state vector
No full textNO ABSTRACT The paper conclude that local causality and a theory with only state vectors of the first type are two rather different thingsPublished26-28ope
Melting of Iron
No full textA theoretical melting curve for iron is determined in the pressure range of
the Earth's core by a relation derived from the Ross-Lindemann melting
criterium. On this basis the melting point of pure iron is estimated to be
about 4800°C at the mantle-core boundary, and 6600°C at the inner
core-outer core boundary with a melting point gradient of about 0-8
deglkm.Published327-334JCR Journalope
On the Melting Curve at High Pressures
No full textThe asymptotic behaviour of the inclting curves for substances with closepacked
structures is analysed by means of Monte Carlo caIculations on
model systems of hard spheres. The Kraut--Kennedy melting law does
not show the correct asymptotic behaviour. On this basis some recent
results on the physics of the Earth's core are rejected.Published45-50.JCR Journalope