Vasiliki Zygouri

• Geoscientist PhD
• University of Patras

Field investigation, Microfacies analysis, and biostratigraphy have been carried out in the central parts of the Ionian Basin (Aetoloakarnania area, Western Greece) in order to decipher the depositional environments that developed during the accumulation of the Upper Cretaceous to Eocene carbonate succession. Three different Standard Microfacies ty...

The Gulf of Corinth is a rapidly opening area with high seismicity associated with extensive building collapses, destruction of cities, and even the deaths of inhabitants. Rapid residential development, especially in the southern part of the Gulf of Corinth, and the construction of crucial technical infrastructures necessitate understanding the act...

Evolutionary stages, from late Eocene to Miocene, of Pindos foreland, mark the transition from Pindos oceanic basin, in the east, to Gavrovo carbonate platform sedimentation in the west. Pindos Thrust as a crustal-scale structural element resulted in the formation of the Pindos foreland. Current research, which is based on detailed field campaign a...

On 3 March 2021, a strong shallow earthquake affected northern Thessaly, Greece, with an epicenter close to Damasi village causing significant destruction of many stone houses. In this contribution, we provide fieldwork observations, satellite radar interferometry, mapping of the active faults exposed in the epicentral area, liquefactions and cosei...

The destruction of Ancient Helike in 373 BC as reported by ancient Greek and Roman writers is inconsistent with modern evidence on the geological context. The classical view of a strong earthquake, similar to the 1817 M = 6.6 earthquake and followed by a giant tsunami wave that permanently inundated the ruined city does not stand up to modern scrut...

Assessment of landslide hazard across mountains is imperative for public safety. Pre- and post-earthquake landslide mapping envisage that landslides show significant size changes during earthquake activity. One of the purposes of earthquake-induced landslide investigation is to determine the landslide state and geometry and draw conclusions on thei...

On 17th November 2015, a strong earthquake affected Lefkada Island, Greece, leading to extensive translational debris slides along the cliff overhanging Egremni beach and the re-activation of previously deposited slope material. The cliff is crossed by the Cephalonia Fault Zone, with mass-wasting processes inducing dry flows occurring in associatio...

Coastline evolution is a proxy of coastal erosion, defined as the wasting of land along the shoreline due to a combination of natural and/or human causes. For countries with a sea border, where a significant proportion of the population lives in coastal areas, shoreline retreat has become a very serious global problem. Remote sensing data and photo...

Integral to the natural process of the earth's surface geology, landslides serve to redistribute soil and sediments in a process that can be recognized in abrupt collapses or in slow gradual slides. In March 1913, a significant volume of rock debris collapsed from the footwall of an active fault in the Krathis River basin, located at the southern p...

This study presents the importance of the accuracy of six digital elevation models (DEMs), in the calculation of the geomorphic indices and the classification of an active fault in the Gulf of Corinth, Greece. Four of the DEMs used are based on public and global satellite imageries, the SRTM90, SRTM30, ASTER and ALOS. The other two are national DEM...

Integral to the natural process of the earth’s surface geology, landslides serve to redistribute soil and sediments in a process that can be recognized in abrupt collapses or in slow gradual slides. In March 1913, a significant volume of rock debris collapsed from the footwall of an active fault in the Krathis River basin, located at the southern p...

A paleoseismological analysis has been performed at the East Giouchtas Fault. This fault dips to the east and represents a pure normal fault. The East Giouchtas Fault forms an intrabasinal high in the Heraklion basin with its conjugate fault the West Giouchtas Fault. A natural surface has been prepared and logged in detail in order to detect the mo...

A relevant hazard in mountainous regions is the steep rock slopes concentrating rock falls. Although rock falls are characterized by smaller rock volumes compared to other landslide types, can also provoke severe damage to buildings, infrastructures and human life due to their sudden and highly fast movement. The key to understand the processes tha...

Shallow earthquakes cause serious damage near the trace of faults. The growth of major cities in hazard prone areas and the public anxiety associated with risks in critical facilities has focused attention to those areas. The Gulf of Corinth constitutes an area prone to high seismicity. During the last 2000 years several strong seismic events have...

2015, με τη χρήση του επίγειου σαρωτή LIDAR ILRIS-(3D-HD). Η θέση σάρωσης βρισκόταν σε κάθετη απόσταση 10 m από την επιφάνεια και ο σαρωτής ρυθμίστηκε κατάλληλα ώστε το βήμα (χω-ρική ανάλυση) σάρωσης να είναι 1 mm. Σαρώθηκε όλη η αποκαλυμμένη ρηξιγενής επιφάνεια, εκτός από το ανώτερο τμήμα του νοτίου άκρου της λόγω πρακτικών δυσκολιών. Επεξεργασία...

We present the Quaternary slip history of the Kenchreai Fault, Gulf of Corinth, based on geomorphological, palaeoseismological, geo-archaeological data and literally determined events. We also applied a series of geomorphic indices such as the hypsometric curve, asymmetry factor, the stream length-gradient index (SL), the valley floor width to vall...

The role of mass movements in slope evolution in mountainous areas can be related both to climatic conditions and to earthquakes which act as trigger mechanisms. In the present contribution we analyze the evolution of rockslides across the Skolis Mountain which during the 2008 incorporated in the epicentral area of a strong earthquake (Mw=6.4). In...

On 17 November 2015 a Mw6.5 earthquake ruptured offshore Lefkada Isl. in Ionian Sea, Greece, causing two victims, damage and ground failures particularly in the SW part of the island, which is consistent with the ground deformation pattern shown by InSAR analysis. Fault plane solutions released by CMT, NOA and other institutes are consistent indica...

The fault’s arrays crossing through Greece change in orientation and kinematics from south to north and from east to west, attesting to the geotectonic complexity of Greece. This complexity is related either to the proximity of faults to major plate boundaries or to the distance from the African (Nubian) – Aegean collision front. This paper will fo...

Inventory of pre-earthquake and earthquake triggered landslides is used to provide insight into the interplay between climatic and tectonic forcing in the development of the rock slopes of the Skolis Mountain, in the NW Peloponnese. Aerial photograph analysis and surface mapping indicate that the Skolis Mountain is characterized by long-term climat...

Inventory of pre-earthquake and earthquake triggered landslides is used to provide insight into the interplay between climatic and tectonic forcing in the development of the rock slopes of the Skolis Mountain, in the NW Peloponnese. Aerial photographs analysis and surface mapping indicate that the Skolis Mountain is characterized by long- term clim...

The previously unknown Nisi Fault in NW Peloponnese was ruptured during the 2008 Movri Mountain earthquake attaining a maximum offset of 25 cm. The fault is interpreted as a branch of a flower structure above a blind strike-slip fault. We investigate the Nisi Fault seismotectonic evolution using morphotectonic analysis in order to determine whether...

The Gulf of Corinth in Greece and especially its southeastern part is dominated by a series of step - like north facing normal faults hosting strong earthquake events. The Kenchreai fault zone, located along the Gulf's southeastern coast, is a key fault for analyzing how a north facing fault accommodates N - S extension in the back - arc region. Th...

The Gulf of Corinth, Greece, is a 110-km-long by 30-km-wide active graben displaying strong seismicity hosted both on north and south dipping normal faults. This complex fault pattern consists of two fault populations, offshore and onshore. The offshore fault population is investigated by densely arranged seismic reflection profiles during the last...

The Gulf of Corinth, in central Greece, is a 110-km-long by 30-km-wide active graben displaying strong seismicity hosted both on north and south dipping, offshore and onshore normal faults. We made an attempt to examine and correlate the scalar properties of both populations along the gulf. We investigated the offshore fault population using alread...

Morphotectonic analysis using geomorphic indices has been developed as a basic reconnaissance tool in order to identify areas experiencing rapid tectonic deformation or estimate relative variations of tectonic activity in a specific area. We applied this analysis in Eliki fault zone, which is located in the western part of the Gulf of Corinth. Elik...

Paleoseismological analysis based οn geological data enable us to understand the recent seismic history of the Eliki fault. Along the eastern "segment (or strand)" scarp 5 trenches have been excavated (8x5x2m), their walls were mapped in scale 1:20 and further analyzed by precise tectono-stratigraphic methodology. The Kerynitis river, which crosses...