NATIONAL AND KAPODISTRIAN UNIVERSITY OF ATHENS
S C H O O L OF S C I E N C E S
FACULTY OF GEOLOGY
DEPARTMENT OF GEOPHYSICS & GEOTHERMICS
LABORATORY OF GEOPHYSICS
SPACE APPLICATIONS RESEARCH UNIT IN
GEOSCIENCES
CONTACT PERSON:
Prof. Evangelos Lagios
lagios@geol.uoa.gr
RESEARCH STAFF
Dr. Evangelos Lagios, Professor
Tel. (+30 1) 7274424, 7247445, Fax: (+30 1) 7243217
E-mail: lagios@geol.uoa.gr
Dr. Nikolaos Voulgaris, Lecturer
Tel. (+30 1) 7274431,
E-mail: voulgaris@geol.uoa.gr
Dr. Ioannis Alexopoulos, Lecturer (407)
Tel. (+30 1) 72 74 106,
E-mail: jalexopoulos@geol.uoa.gr
Dr. Issaak Parcharidis, Research Associate
Tel. (+30 1) 7274424
E-mail: parchar@geol.uoa.gr
Dr. (Mrs.) Spyridoula Vassilopoulou, Research Associate
Tel. (+30 1) 7274424
E-mail: vassilopoulou@geol.uoa.gr
POST-GRADUATE STUDENTS
Mr. Ioannis Giannopoulos, Student Doctorate
Tel. (01) 7243217
E-mail: ggiann@cc.uoa.gr
Mr. Stylianos Chailas, Doctorate Student
Tel. (01) 7243217
E-mail: schailas@cc.uoa.gr
Mr. Pavlos Dafnis, Doctorate Student
Tel. (01) 7243217
E-mail: dafnis@geol.uoa.gr
RECENT PUBLICATIONS
GIANNOPOULOS J., LAGIOS E. & SIGMUNDSONN F. (1996). Global
Positioning System (GPS) Monitoring on Santorini (Thera) Volcano. Proc. 2nd
Workshop on European Laboratory Volcanoes, May 2-4, Santorini, Greece (Publ.
Europ. Comm. DGXII Environment and Climate Res. Progr.), 271-279.
LAGIOS E., CHAILAS S., GIANNOPOULOS J. & SOTIROPOULOS P. (1998).
Surveillance of Nissyros Volcano : Establishment and remeasurement of Rn & GPS
networks. Proc. 8th Intern. Congress
32/4, 215-227.
Geol. Soc. Greece, Patra, May 27-29, Vol.
LAGIOS E. (2000). Intense crustal deformation rates on Nissyros Island (Greece),
deduced from GPS studies, may foreshadow a forthcoming volcanic event. Proc. 2nd
Intern. Conf. On Earthquake Hazard and Seismic Risk Reduction, Sept. 15-21,1998,
Yerevan, Armenia (in press).
LEKKAS, E., LOZIOS, S., BERTAKIS, G. & VASSILOPOULOU, S. (1995). Management of geoenvironment problems (Natural Hazards). A method for landslide
hazard assesment using Geographical Information Systems (G.I.S.). XV Congress of
the Carpatho-Balkan Geological Association, Special Publications of the Geol. Soc.
Greece, No 4/3, p.998-1001.
LEKKAS, E., VASSILOPOULOU, S., CHATZINAKOS, I., (1998). – Engineering
geological conditions – Landslide phenomena in the village of Ropoto (Trikala –
Greece). 8th Congress of the IAEG Engineering Geology – A Global view of the
Pacific Rim., Editors D. P. Moore, O. Hungr. Vol. III, p. 1807 – 1812, Vancouver.
PAPADOPOULOS T.D., STAVRAKAKIS G.N., ALEXOPOULOS J.,
VOULGARIS N. & DRAKOPOULOS J. (1997). AUTO-SEISMO-GEOTECH. A
GIS based multidisciplinary microzonation project - Part II Geophysical
investigations. Proc. of European Union of Geosciences (EUG 9), 23-27 March,
Strasbourg - France.
PARCHARIDIS, IS., PSOMIADIS, E., STAMATIS, G. (1998): Using Landsat TM
images to study karstic phenomena. ITC Journal, 1998-2, 118-123.
PARCHARIDIS, Is. (1998). Morphostructure patterns in satellite multi-spectral
Landsat TM images. Geologica Carpathica, 49, 5, 307-313.
PARCHARIDIS Is., POSCOLIERI M., NIKOLAKOPOULOS K. and SERELIS K.,
(1999). Revised geomorphic and geologic outlines of Lesvos island by a comparative
analysis of TM Landsat data and classical maps. Proceedings of International
Geoscience and Remote Sensing Symposium (IEEE, Hamburg 28-6/2-7/ 1999), v. II,
p.876-878.
PARCHARIDIS IS., GATSIS I., PSOMIADIS EM. & STAMATIS G. (1999).
Landsat TM data and information technology to potential water pollution detection in
Vegoritis-Petron lakes (Greece). Proceedings of the 6th Intern. Conference on
Environmental Science and Technology (Global NEST), vol. I, p. 401-409
PARCHARIDIS, Is., GARTZOS, E. & PSOMIADIS, E., 1999. Alteration zones
detection in Lesbos island, through the application of Landsat band ratio images.
Mineral Wealth, 112, p. 37-46
PARCHARIDIS IS., PAVLOPOULOS A., SERELIS K. & TSINTZOURAS S.
(1999). Man made impact monitoring in Messologhi lagoon system using
multispectral ERS.SAR data. Proceedings of the 6th Intern. Conference on
Environmental Science and Technology (Global NEST), vol.II, p. 416-423
VASSILOPOULOU S. (2000). Geodynamics of the Argolis Peninsula with the G.I.S
development and use of Remote Sensing Data. Phd Thesis, University of Athens,
Department of Geology. p. 210
CURRENT RESEARCH ACTIVITY
Geo-spatial Warning Systems (GEOWARN)
Information Societies Technology (IST)
European Union Project
http://www.geowarn.org
ABSTRACT
Quiescent but active volcanoes in regions of high geodynamic unrest present a severe
hazard and risk potential and require integrated monitoring, satellite surveying and
modelling. Monitored geodetic, seismic and geochemical data together with satellite
images will be transferred and unified in a coherent way to allow integration into a
geo-spatial information system (GIS). An interactive and user-friendly multimedia
tool will then be introduced as platform encompassing a workflow of graphical 2- to
4-D landscape models and all monitored data. Hazard and scenario modelling in space
and time will be achieved within the CD-ROM/WWW-based multimedia platforms.
An early-warning system and emergency plan, applicable to other volcanic areas and
educational video spots will be delivered to generate public awareness. A quick
reference manual serves for trouble shooting and quality assurance. The volcanic
island of Nisyros (South Aegean Sea), that suffered a seismic crisis between 19961998 is seen as a unique example to accomplish the multi-parametric data set. The
Nisyros case will then be compared with another European volcanic field, Campi
Flegrei/Solfatara (Italy), which bears a high potential for volcanic reactivation and
accompanied earthquakes.
NISYROS
Surveillance of Nisyros Volcano: Geophysical and Geodetic measurements 1999.
Council of Europe, E.C.P.F.E.
GPS and Radon networks were established on Nisyros Island, for the surveillance of
its active volcano in June 1997. Repeated measurements of the GPS network can
provide a picture of the crustal deformation of the area due to the probable upward
magma motion or/and the breakout of an intense seismic activity.
Parallel to the measurements of the GPS network for the determination of vertical and
horizontal crustal deformation of the area, a Radon network was also re-measured.
The Radon level variations were therefore determined, and a correlation to the
observed seismic activity is aimed, especially by using the continuous time-series
radon values provided by a permanently established multi-parameter radon-measuring
station in Mandrakion (Nisyros), transmitting the data to Athens via satellite in realtime.
It has been shown that no significant horizontal deformation has generally taken place
in Nisyros for the last two years 1998 and 1999. The presently therefore observed
deformation is the one remained in Nisyros since the end of 1997, after the earthquake
crisis of 1996/97, being basically controlled by two major faulting zones of the island.
The previously (1997) registered uplift at all GPS stations of the network (20-40 mm)
presenting a picture of a “bulge”, seems to have been adjust to previous normal levels,
with the exception of the stations at the western and northern part of the island, where
their uplift character (about 20mm) still prevails.
The Radon level variation over Nisyros has not increased; on the contrary, some
stations having systematically larger radon values compared to the others exhibit now
half-level values than usual.
The above observations seem to be compatible with the seismicity of the area, which
seems to be at a low admittedly level.
GPS NETWORK OF NISYROS ISLAND
36.90
B
17
KOS
36.80
22
60
36.70
YALI
25314
25312
36 11
9 32
40 13
41
28
25311
46
3
25309
54
38
52
49
55
34
36.60
NISYROS
31
36.50
26.90
27.00
27.10
27.20
27.30
Base-lines of GPS Network
SANTORINI
Santorini GPS Network
A GPS network for crustal deformation studies was established on Santorini Island
System, during summer 1994, for the surveillance of the Santorini Volcano. The GPS
network, consisting of fourteen stations on the mainland of Thera, four on Nea
Kammeni and two on Therassia, was also remeasured in 1995. The results of the
measurements and the accuracy of the GPS Network is basically on a few millimeters
level. The remeasurements of the network indicates that there is not any deformation
in the area, and a current stability of the caldera is inferred. There was a
remeasurement of the network along certain long baselines during 1996. The only
change observed is the one on the line Pyrgos – Nea Kammeni, indicating a difference
of 216mm, 104mm and 155mm along the X, Y and Z directions, respectively.
However, there is no change observed between the line Pyrgos – Therasia during the
same time period (1995 – 1996)
CEPHALONIA (forthcoming)
GPS network and InSAR
ATALANTI Fault System (forthcoming)
GPS network and InSAR
HARDWARE & SOFTWARE FACILITIES
The Unit of Space Applications in Geosciences provides a centralized source of
software and hardware facilities for the following applications, available for the
community of the Geology Faculty of the University of Athens:
(i)
(ii)
(iii)
Global Positioning System (GPS)
SAR Interferometry
Satellite Image Processing
1. HARDWARE
1.1 Personal Computers:
Two (2) high-performance PLATO 700 MHz Pentium III
768 MB of memory
18 GB of disk space
20-inch high-resolution monitors
Internal CD-ROM drives and CD-Writer
Network commun. Cards etc.
Two (2) Laptop (One HP Omnibook XE II, and one TOSHIBA Satellite)
Pentium III 450
64 MB of memory
Internal CD-ROM driver
Video Camera
Network commun. Cards etc.
Two (2) Pentium II 300 MHz
64 MB of Memory
8.2 GB of disk space
17-inch high-resolution monitors
Internal CD-ROM drivers
Network commun. Cards etc.
1.2 Peripheral Computer Equipment:





Epson Stylus Color 1160, A3
Epson Stylus photo 750, A4
HP DeskJet 815, A4
A3 ScanMaker Microtek 9600 XL
CD Rewritable Recorder
1.3 GPS Receivers
Geodetic GPS receivers of type WILD SR 299 (to be upgraded to SR 399).
2. SOFTWARE
2.1 Satellite Image Processing

Five licenses for ERDAS Imagine; a satellite image processing and analysis
software package.
2.2 SAR Interferometry

A single-user license for EarthView InSAR; a software designed to produce
digital elevation models and height change maps through the use of repeat
pass SAR interferometry.

A single-user license for Earth-View Advanced Precision Processor (APP);
an advanced SAR Processor for a full choice of SAR processing algorithms
and parameters.
2.3 GIS

A single-user license for Arc View 3.2 (including Spatial and 3-D Analyst
extensions).
2.4 GPS
SKI Pro, Software for the analysis of GPS measurements using geodetic
receivers.
ARCHIVES of SATELLITE IMAGES
The Unit has large and growing archives of SPOT, LANDSAT TM, LANDSAT
ETM, ERS-1, ERS-2, SIR-C and IKONOS Images.
These are available for research projects and educational purposes. The data cover the
whole Hellenic area and most of the adjacent regions.