The United States Geological Survey
recorded a Magnitude 5.5 Earthquake at a depth of 151 km, roughly 16 km to
the southeast of the village of Comandau in Covasna County, in the
southeast Carpathian Mountains of Romania, slightly after 3.35 am local time (slightly after 0.35 am GMT)
on Sunday 28 October 2018. There are no
reports of any damage or injuries arising from this event, but it was
felt over much of Romania and Moldova, as well as in parts of Serbia, Bulgaria and Ukraine. This is roughly what would be expected
from an Earthquake of this size at this depth; the quake is big enough
to be felt over a wide area, but most of its energy has dissipated
before the shock-waves reach the surface.
The approximate location of the 28 October 2018 Romanian Earthquake. USGS.
The Carpathian Mountains form part of the suture formed when the Tethys
Ocean closed during the Mesozoic, joining the continents of Laurasia (to
the north) and Gondwana (to the south). The area is now internal to the
Eurasian continent, but the area to the south, known as the Moesian
Platform, has a separate origin to the rest of Europe. This system is
once again being stressed by the impact of Africa into Eurasia from the
south, with the Anatolian Plate (which underlies Anatolian Turkey),
Aegean Plate (which underlies southern Greece) and Adriatic Plate (which
underlies eastern Italy and the western Balkan Peninsula) caught
between the two larger units, leading to a more complex interplay of
stresses across southeastern Europe. The Antatolian and Aegean Plates
are located to the south of the Moesian Platform, and are being pushed
to the west, while the Adriatic Plate lies to the west of the Aegean
Plate and Moesian Platform, and is being pushed to the northeast.
Witness
accounts of Earthquakes can help geologists to understand these events,
and the structures that cause them. The international non-profit
organisation Earthquake Report is interested in hearing from people who may have felt this event; if you felt this quake then you can report it to Earthquake Report here.
See also...
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