International research team publishes latest seafloor maps
Tectonically, the Mediterranean is very active and faces the threat of
natural disasters, as demonstrated by the recent earthquakes in Central
Over the last few years, an international scientific team, with
the collaboration of GEOMAR Helmholtz Center for Ocean Research Kiel,
has extensively examined the seabed south of Sicily and Calabria.
Since the early civilisations, the lives of the people in Europe, the
Near East and North Africa have been closely linked to the
Mediterranean, with natural catastrophes like volcanic eruptions,
earthquakes and tsunamis repeatedly shattering neighbouring cultures
and states. This is due to the fact that the Eurasian and African
tectonic plates meet in the Mediterranean.
"Unfortunately, the situation is very complicated, there are many different zones in the sub-region,”
explained GEOMAR geophysicist Prof Dr Heidrun Kopp in German, adding
that this made the risk analysis for certain regions very difficult.
For the research (which involved extensive seabed surveys off the coast
of Sicily and Calabria), he worked with colleagues from France, Italy
and Spain, as well as from the University of Kiel and University of
Bremen. Their findings are now published in the current edition of the
international scientific journal, Earth and Planetary Science Letters.
The research uncovered evidence of an active plate boundary in the
region. "Historical natural disasters
testify to activity in this area, but so far, its causes have not been
well known. Now, we are starting to understand them better,” said Prof Kopp.
The findings were based on six expeditions conducted since 2010
(including three with the German research ship METEOR. During these
exits, the teams used the latest technologies to map the seabed. In
addition, they also used seismic methods to investigate the interior of
the seabed and gather information about its composition, to as deep as
“We are already aware of the
sedimentary layers in the region, which are typical when one tectonic
plate slides under another. However, to date, it has been questionable
whether these are old structures or whether such subduction zones are
still active,” Kopp explained.
New investigations show that the
plates are still moving, albeit slowly. Thus, stresses may still be
building up in the earth's interior.
The region which the scientists are investigating is of great interest
because it has been repeatedly hit by devastating earthquakes and
tsunamis in the past. For instance, in 1908, an earthquake in the
Messina sea range caused a subsequent tsunami; 72,000 lives were lost.
“Of course, even with the new
findings, we cannot predict if and when a severe earthquake would
strike. However, the more we know about the seabed and its structure,
the better we can predict where natural hazards would take place.
Hence, the risks and devastation can be mitigated with better disaster
prevention measures and regulations,” said Kopp.