Geologic Hazards along the San Lucido - Amantea Coastal Zone, Catena Costiera, Calabria


Primary Geologic Hazards


Surface ruptures are probable along the major, youthful N-S faults, located largely at the break in slope between the coastal plain and the mountain slopes. As yet, no study has been done of the paleoseismology of the faults, therefore, nothing is known of their earthquake potential.

Ground shaking from moderate and large earthquakes similar to the great Calabrian earthquake of 1783 (Sarcone, 1784) would surely cause much damage to local construction.

Liquifaction is possible if water-saturated beach sand exists beneath the present coast plain.

Earthquake-triggered Landslides and Rockfalls are commonly shaken loose by earthquakes where slopes are steep, rocks are weak, and rainfall may be high.

Landslide-dam bursts seem not such a great hazard only because limited water flows in the canyons would fill up a landslide dam slowly enough that the resultant lake could be drained soon before a major lake could accumulate, except during the times of heavy rainfall and flash floods.

Tsunami and Seiches are generated by earthquakes, and major to major earthquakes are common is this part of the Mediterranean region.

Floods and Debris Flows prevail in areas of thundershowers and rapid runoff, as is common in southern Italy. Abundant debris flow deposits and deep canyons attest to these hazards in the study area.

Landslides - "Tutti in Calabria si muovi" is certainly true in the mountain slopes underlain by weak rocks, especially in the Longobardi area.

Surface slips occur through the study area, especially in the weak rocks.

Sackung are deep-seated landslides that may have originated more than 40,000 years but are now buttressed by accumulated marine sediments offshore.

Storm Waves and Surge certainly may be expected to affect the low, narrow coastal plain in the study area.

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