During the last twenty-three years I have been engaged in a variety of
research activities. My principal interest is active tectonics, but the
necessity to use a series of interdisciplinary tools and technologies to
advance scientific knowledge, has driven my interests in many neighboring
topics. I list below the main topics I can deliver international standards
research (incl. reviews), always leading or being part of a team of qualified
experts.
1. Crustal deformation due to earthquakes and tectonic strain. I am
particularly interested in the quantification of the deformation and the
comparative use of strain metrics (dilatation, second invariant etc) in understanding magnitude/patterns of strain. I use
GPS observations and InSAR maps to quantify strain rates in Greece.
2. Tectonic Geomorphology and in particular the relation of erosional
platforms (such as triangular facets) to fault slip rates. I use a combination
of field geology, space geodesy and digital morphometry on global DEMs (ASTER,
SRTM).
3. Seismology with emphasis on relocation of earthquake sequences for
fault mapping, paleoseismology for estimating
recurrence intervals along strike of active faults, use of software such as
Z-map to map b-value distributions across the earthquake cycle (inter-, co-,
post seismic) to map stress levels, seismotectonics,
Coulomb stress distribution following large earthquakes and its relation to
seismicity levels.
4. Operation of early warning systems for earthquakes, volcanic eruptions
and tsunamis based on GNSS technology. I have developed a prototype of an early
warning platform at NOA based on GNSS. The platform uses state-of-the-art
software to process GNSS signals from dual-frequency geodetic receivers along
the Hellenic Arc.
5. Operation of GPS networks to map crustal deformation (including
subsidence) using static observations from both permanent and campaign
stations. I also make use of RTK GNSS observations in tectonic geomorphology
and fault mapping.
6. Microzonation studies to map active faults and/or subsiding areas so
as to contribute to safe urban planning and construction of important
buildings, objects (bridges etc). I use a combination of field geology,
seismology, applied geophysics and space geodesy.
7. Ground subsidence due to groundwater extraction, oil/gas exploitation.
I also use a combination of field geology, remote sensing, seismology, applied
geophysics and space geodesy.
8. Mineral exploration using satellite and airborne data from
multispectral (and hyperspectral) sensors. I use image processing software to
map clay minerals and pathfinder minerals in regions with well-exposed volcanic
alterations.
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