A5009680396- earthquake and tectonic studies
- Earthquake Detection and Analysis
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Geophysical Methods and Applications
- Seismic Waves and Analysis
- GNSS positioning and interference
- Geophysical and Geoelectrical Methods
- High-pressure geophysics and materials
- Seismology and Earthquake Studies
- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- Maritime and Coastal Archaeology
- 3D Surveying and Cultural Heritage
- Geophysics and Gravity Measurements
- Geological and Geophysical Studies
- Geological and Geophysical Studies Worldwide
- Archaeological Research and Protection
- Rock Mechanics and Modeling
- Landslides and related hazards
- Seismic Imaging and Inversion Techniques
- Marine and environmental studies
- Geology and Paleoclimatology Research
- Osteomyelitis and Bone Disorders Research
- Planetary Science and Exploration
- Dam Engineering and Safety
National and Kapodistrian University of Athens
2011-2022
Hellenic Mediterranean University
2021-2022
University of Leicester
1997-2002
On 30 October 2020 11:51 UTC, a Mw=6.9 earthquake struck the offshore region north of Samos Island, Greece, in Gulf Ephesos/Kuşadasi, causing two fatalities and 19 minor injuries at as well 115 casualties over 1,030 Western Turkey. Preliminary results indicate that mainshock occurred on north-dipping normal fault, with focal mechanism 270º/50º/-81º. The selection fault plane is supported by evidence uplift western 10 cm subsidence northernmost edge central part island. distribution relocated...
Abstract We investigate a seismic crisis that occurred in the western Gulf of Corinth (Greece) between December 2020 and February 2021. This area is main focus Rift Laboratory (CRL) network, has been closely monitored with local seismological geodetic networks for 20 yr. The 2020–2021 evolved three stages: It started an Mw 4.6 event near northern shore Gulf, opposite Aigion, then migrated eastward toward Trizonia Island after 5.0 event, eventually culminated 5.3 ∼3 km northeast Psathopyrgos...
Seismicity in the Ionian Sea (W. Greece) is mainly generated along Cephalonia–Lefkada Transform Fault Zone (CLTFZ) central Ionian, and on northwestern termination of Hellenic subduction margin south. Joint pre-, co- post-seismic ground deformation seismological analysis performed at broad area, aiming to homogeneously study spatiotemporal evolution activity prior after occurrence strong (M > 6) earthquakes during period 2014–2018. The 2014 Cephalonia (Mw6.1 Mw5.9) were a faulting system...
Abstract. In the present study SAR interferometric techniques (stacking of conventional interferograms and Permanent Scatterers), using images from satellites ERS-1 2, have been applied to region Thessaloniki (northern Greece). The period covered by is 1992–2000. Both gave good quantitative qualitative results. products were used ground surface deformation phenomena that could be related local tectonic context, exploitation underground water sediments compaction. city shows relatively stable...
The Methana volcano in Greece belongs to the western part of Hellenic Volcanic Arc, where African and Eurasian tectonic plates converge at a rate approximately 3 cm/year. While volcanic hazard is considered low, neotectonic basin constituting Saronic Gulf area seismically active there evidence local geothermal activity. Monitoring therefore crucial characterize any activity that could impact population. This study aims detect surface deformation whole peninsula based on long stack 99...
Modelling of combined Global Navigation Satellite System (GNSS) and Interferometric Synthetic Aperture Radar (InSAR) data was performed to characterize the source Mw6.9 earthquake that occurred north Samos Island (Aegean Sea) on 30 October 2020. Pre-seismic analysis revealed an NNE–SSW extensional regime with normal faults along E–W direction. Co-seismic showed opening epicentral region horizontal vertical displacements ~350 mm ~90 mm, respectively. Line-of-sight (LOS) interferometric...
The 27 September 2021 damaging mainshock (Mw6.0) close to Arkalochori village is the strongest earthquake that was recorded during instrumental period of seismicity in Central Crete (Greece). preceded by a significant number foreshocks lasted nearly four months. Maximum ground subsidence about 18 cm estimated from InSAR processing. aftershock sequence located an almost NE-SW direction and divided into two main clusters, southern northern ones. foreshock activity, deformation area,...
Abstract The application of conventional SAR Interferometry (InSAR) together with the two techniques subcentimeter accuracy, Stacking and Permanent Scatterers (PS) Interferometry, were used to study ground deformation in broader area Athens for period 1992 2002. Using interferometric method, 55 ERS-1&2 scenes, between 2002, acquired producing 264 differential interferograms. Among these only 60 finally selected as fulfilling certain criteria. co-seismic associated Earthquake (M w = 5.9,...
<p>Knowledge of the present-day relationships between earthquakes, active tectonics, and crustal deformation is a key for understanding geodynamics, ongoing surface processes (i.e. erosion, sedimentation, etc.) also essential risk assessment management geo-reservoirs energy waste.</p><p>Greece characterized by most tectonically regime in eastern Mediterranean, involving (a) intense thickening, with an uplift rate few mm/yr along Hellenic Arc due to...
Coastal areas constitute a very dynamic environment, balancing between numerous natural and anthropogenic processes liable to sometimes hazardous geomorphic phenomena. Especially in tectonically active coastal regions of high economic value, slope failures can have significant impacts therefore need careful detailed examination. This work uses Unmanned Aerial System (UAS)-aided photogrammetry Terrestrial Laser Scanning (TLS) segments the zone Ionian Islands Greece, explore how their...
SUMMARY The properties of the Mw = 6.7 earthquake that took place on 25 October 2018, 22:54:51 UTC, ∼50 km SW Zakynthos Island, Greece, are thoroughly examined. main rupture occurred a dextral strike-slip, low-angle, east-dipping fault at depth 12 km, as determined by teleseismic waveform modelling. Over 4000 aftershocks were manually analysed for period 158 d. events initially located with an optimal 1D velocity model and then relocated double-difference method to reveal details their...
Abstract The land subsidence which occurs at the Larissa Basin (Thessaly Plain, Central Greece) is due to various causes including aquifer system compaction. Deformation maps of high spatial resolution deduced by Persistent Scattering Interferometry (PSI) technique (using radar scenes from ERS and ENVISAT satellites) for period 1992–2006 were produced study temporal ground deformation. A developed GIS database (including geological, tectonic, morphological, hydrological, meteorological...
We investigate an earthquake sequence involving Mw = 4.6 mainshock on 2 December 2020, followed by a seismic swarm in July–October 2021 near Thiva, Central Greece, to identify the activated structures and understand its triggering mechanisms. For this purpose, we employ double-difference relocation construct high-resolution catalogue examine detail distribution of hypocenters spatiotemporal evolution sequence. Furthermore, apply instrumental imaging geodesy map local deformation long-term...
We have used magnetotelluric data imaging to determine the resistivity structure across southern Kenya and our results suggest presence of a buckled blocky or segmented lithosphere region. Prominent steep conductive zones at Oloololo (OLO) escarpment eastern rift margin allow us subdivide region into three crustal domains. West OLO, bow‐shaped conductor underlies 10 km thick resistive upper unit spatially correlating with an exposed Archaean greenstone belt. Between OLO are found steeply...
On 2 December 2020, a moderate and shallow Mw = 4.6 earthquake occurred in Boeotia (Central Greece) near the city of Thiva. Despite its magnitude, co-seismic ground deformation field was detectable measurable by Sentinel-1, ascending descending, synthetic aperture interferometry radar (InSAR) acquisitions. The closest available GNSS station to epicenter, located 11 km west, measured no deformation, as expected. We proceeded inversion source. Moreover, we reassessed seismological data...
SUMMARY Tectonic activity is very difficult to study in the Santorini volcanic complex (SVC) as it comprises a cluster of small/awkwardly shaped islands covered by pyroclastic deposits from which tell-tale markers are swiftly erased, while seismicity generally absent. We address problem combining geophysical exploration methods evaluate long-term effects tectonic deformation and time-lapse differential GPS directly magnitude kinematics present-day deformation. The former comprise 3-D gravity...