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Observations of electromagnetic radiation in the Central Apennines seismic region

Ernst T., Jankowski J., Teisseyre R., Meloni A., Palangio P.

Acta Geophysica Polonica

2001

Vol. 49, nr 1

43-53

In recent years, continuous radio-noise recording is in use at many geophysical observatories, in order to detect possible earthquake precursors and/or coseismic signals. The recordings obtained indicate that electromagnetic radiation (e.g., in the range of 10-40 kH) can indeed be treated as seismic precursor. We present here the examples of successful prediction observation, which we have obtained in the Central Apennines region at the l'Aquila Observatory (Polish-Italian cooperation). A short discussion on relation between the evolution of stresses (dislocation dynamics) and electromagnetic emission supplements this paper.

The extent of Pleistocene glaciations in the western part of the Campo Imperatore (Gran Sasso Massif, Central Italy)

Bisci C., Gentili B., Ciccacci S., Dramis F., Kotarba A.

Landform Analysis

1999

Vol. 2

37--43

The Campo Imperatore is a virtually undrained tectonic depression located in the inner part of the Gran Sasso Massif, the highest relief within the Apennines (2,912 m a.s.l. at Corno Grande). This paper reports some major géomorphologie features of the western part of this depression, which represents a specific and very fine example of glaciated mountain landscape, where landforms typical of glacial erosion are commonplace over l ,800 m a.s.l. Most of the glacial cirques are characterized by karstified bedrock topography, in places covered with thin drift deposits. Distinct recessional moraines are also present at various altitudes (i.e. around 2,250; 2,180; 2,000 and 1,740 m a.s.l). However, the most typical landforms on the floor of the main depression are those due to glacial deposition. There, at altitudes ranging around 1,640—1,590 m a.s.l., stagnant ice déglaciation patterns dominate in the form of a wide lobate moraine system which rises 25—30 m above an outwash plain covered by glaciofluvial, lacustrine and alluvial deposits. Within the latter, small (less than 10 m high) hills, comprising glacial drift, protrude from the flat valley floor. The remnants of these strongly degraded, transformed and laterally-eroded moraines denote the maximum extent of an older glaciation, some 1.5 km remote from the main system.