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IJEGE 07 - Volume 02

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IJEGE 07 - Volume 02
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IJEGE 07 - Volume 02
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IJEGE 07 - Volume 02
At 6.30 (solar hours) of 30th of April 2006, the northern slope of Monte di Vezzi, at Barano d’Ischia, was strongly affected by a succession of landslide events causing four victims. Barely 14 mm of rain fell on 29th and 30th April, immediately before the landslide event, as recorded by the meteorological station at Forio d’Ischia (contrada Calitto, at 150 m asl) 6 km away from the landslide. Some hours after the landslide, the station also monitored rainfall of 16 mm. However, the many reliable testimo
IJEGE 07 - Volume 02
We present a magnetic and gravimetric study of the structural setting of the Monte di Vezzi area, in the Ischia Island. The study was performed carrying out an analysis of a new high-resolution aeromagnetic data set and a previous gravity data set. The aeromagnetic survey covered the entire area of the island with a flight line spacing and a clearance of 300 meters. The analysis of the magnetic data set, that included reduction to the pole and computation of the horizontal derivative of data, lead to the lo
IJEGE 07 - Volume 02
Volcanic activity at Ischia Island encompasses five phases, aged between 150 ky B.P. and 1302 A.D. Different stages of volcanic activity implied different volcano-tectonic events, summarized as follows: a) Epomeo horst resurgence, b) built of the structural highs of Mt. Vico, Mt. Panza (at west), Mt. di Vezzi, Mt. Torone, Mt. Campagnano (at east), c) Ischia graben development in the eastern sector of the island. According to several authors Mt. di Vezzi, constructed in the second phase of activity (150 ky-
IJEGE 07 - Volume 02
This paper represents a pedological contribution on the understanding of the soils of the detachment crowns of the landslides occurred in Ischia on April 30th 2006 at Monte di Vezzi. Such contribution is relevant considering that the material mobilised by the landslides is mainly composed of soils with various degree of pedogenesis and very few rock fragments. The study has been conducted on two soil profiles sampled on two representative detachment crowns. The main outcome of the chemical, physical and min
IJEGE 07 - Volume 02
Flowslides are mass movements generally rainfall-induced. These phenomena are very frequent in the Campania Region, whose mountains are diffusively covered with pyroclastic deposits derived from the past volcanic activity. Geophysical techniques may play an important role in investigations of potentially unstable slopes since they provide an accurate knowledge on the in depth distribution of these structures. In this paper, we present and discuss the electrical resistivity tomographies obtained from measure
IJEGE 07 - Volume 02
In this paper some of the main features of the landslides that occurred on April 30th, 2006, on the northern slope of M.Vezzi, on the Ischia island (province of Naples, southern Italy), are described. Such landslides represent a further example of volcanic debris slides - avalanches - flows in Campania. Although occurred in a particular geological and geomorphological context, due to the unique nature and landscape of the Ischia island in Campania, they share with other similar landslides in the region the
IJEGE 07 - Volume 02
This paper summarises the first results of a geomorphological study we carried out in the area struck by the 30th April 2006 landslides, in Ischia island. This study aimed at the documentation of the landslide traces, and at providing new evidences on the role played by the pre-existing landforms in the location of the source areas, in landslide propagation and motion, and in the distribution of localized and distal accumulation. This was done through field surveys (started soon after the events), and by an
IJEGE 07 - Volume 02
On the April 30th, 2006, during the early morning, five shallow landslides were triggered on the northern side of the Mount di Vezzi (Ischia Island, Italy) that moved down slope, as very rapid flows, channelled into the hydrographical network, and reached the foot of the relief. One of the landslides stroke and destroyed a building located in correspondence of the outlet of a channel, leading to the loss of four human lives. Already by the earliest surveys, the landslides were recognised as shallow and invo
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