D. Hatzfeld - Academia.edu (original) (raw)

Papers by D. Hatzfeld

Research paper thumbnail of The Kozani-Grevena (Greece) earthquake of 13 May 1995 revisited from a detailed seismological study

Bulletin of the Seismological Society of America, 1997

The Kozani earthquake (Ms = 6.6) of 13 May 1995 is the strongest event of the decade in Greece an... more The Kozani earthquake (Ms = 6.6) of 13 May 1995 is the strongest event of the decade in Greece and occurred in a region of low seismic activity. Using regional data and the strong-motion record at the Kozani station, we relocate the mainshock at 40.183° N and 21.660° E, beneath the Vourinos massif at a depth of 14.2 km. We also compute a focal mechanism by body-waveform modeling at teleseismic distance, which confirms a normal mechanism. The most likely plane strikes 240° ± 1° N and dips 40° ± 1° N with a centroid depth of 11 ± 1 km. Modeling of the strong-motion record at Kozani confirms that nucleation started at the eastern termination of the bottom of the fault.Six days after the mainshock, we installed a network of 40 portable seismological stations for one week around the epicentral region. Several thousand aftershocks were recorded, among which we locate 622 with a precision better than 1 km. We compute 181 focal mechanisms that mostly show normal faulting. The aftershock sei...

Research paper thumbnail of Comparisons of the kinematics and deep structures of the Zagros and Himalaya and of the Iranian and Tibetan plateaus and geodynamic implications

Reviews of Geophysics, 2010

Research paper thumbnail of The M s= 6.2, June 15, 1995 Aigion earthquake (Greece): evidence for low angle normal faulting in the Corinth rift

Journal of Seismology, 1997

Research paper thumbnail of 3D crustal structure from local earthquake tomography around the Gulf of Arta (Ionian region, NW Greece)

Research paper thumbnail of Rayleigh wave group velocity tomography in the Aegean area

Research paper thumbnail of Continental collision, gravity spreading, and kinematics of Aegea and Anatolia

Tectonics, 2000

We have carried out experiments using a layered medium of sand and silicone to investigate the la... more We have carried out experiments using a layered medium of sand and silicone to investigate the lateral extrusion of a material which spreads over its own weight while being compressed by the advance of a rigid indenter. Boundary conditions in the box mimic those prevailing in the Anatolian‐Aegean system. Both shortening in front of the rigid piston, which models the northward motion of Arabia, and extension resulting from the gravity spreading of the sand‐silicone layer are necessary to initiate the lateral extrusion. Strike‐slip faults accommodate the lateral escape and link the normal faults accompanying gravity spreading with the thrust faults in front of the rigid indenter. Strike‐slip faults begin to accommodate extrusion at a late stage in the experiments after the normal and thrust faults have developed. Experiments also show that the initial geometry of the boundary of the spreading layer may result in the formation of two arcs behind which material extends, in a manner anal...

Research paper thumbnail of Determination of Ground Displacements in the Seismic Zone of Vol VI, Greece

Survey Review, 1997

ABSTRACT In 1994, a resurvey of the geodetic control network in the seismic zone of Volvi, in Nor... more ABSTRACT In 1994, a resurvey of the geodetic control network in the seismic zone of Volvi, in Northern Greece (Mygdonian graben), was carried out using GPS techniques. The coordinates of the network stations as computed during the 1994 campaign were then compared with the original coordinates of the same stations as determined in 1979 by triangulation. The comparison between the two sets of data shows that this part of the Mygdonian graben experienced a N-S extension of about 8cm between 1979 and 1994 (5mm/year of horizontal extension).

Research paper thumbnail of Lithospheric structure of the Aegean obtained from P and S receiver functions

Journal of Geophysical Research: Solid Earth, 2006

Research paper thumbnail of Active deformation of the Corinth rift, Greece: Results from repeated Global Positioning System surveys between 1990 and 1995

Journal of Geophysical Research: Solid Earth, 2000

Between 1990 and 1995, we carried out seven Global Positioning System (GPS) campaigns in the Cori... more Between 1990 and 1995, we carried out seven Global Positioning System (GPS) campaigns in the Corinth rift area in order to constrain the spatial and temporal crustal deformation of this active zone. The network, 193 points over ∼10,000 km2, samples most of the active faults. In order to estimate the deformation over a longer period, 159 of those points are also Greek triangulation pillars previously measured between 1966 and 1972. Two earthquakes of magnitude 6.2 and 5.9 have occurred in the network since it was installed. The extension rate deduced from the analysis of the different GPS data sets is 14±2 mm/yr oriented N9° in the west, 13±3 mm/yr oriented S‐N in the center, and 10±4 mm/yr oriented N19°W in the east of the gulf. The comparison between GPS and triangulation gives higher rates and less angular divergence (25±7 mm/yr, N4°E; 22±7 mm/yr, S‐N; 20±7 mm/yr, N15°W, respectively). Both sets of data indicate that the deforming zone is very narrow (10–15 km) in the west, might ...

Research paper thumbnail of The Kozani-Grevena (Greece) earthquake of May 13, 1995, a seismological study

Journal of Geodynamics, 1998

Research paper thumbnail of GPS network monitors the Arabia-Eurasia collision deformation in Iran

Research paper thumbnail of Rapid N-S extension in the Mygdonian Graben (northern Greece) deduced from repeated geodetic surveys

Geophysical Research Letters, 1997

Research paper thumbnail of Variation of Moho depth in the central part of the Alborz Mountains, northern Iran

Geophysical Journal International, 2010

Research paper thumbnail of The 2003 December 26 Bam earthquake (Iran),Mw6.6, aftershock sequence

Geophysical Journal International, 2005

Research paper thumbnail of Active tectonics of the Algerian Atlas Mountains-evidence from aftershocks of the 1980 El Asnam earthquake

Geophysical Journal International, 1989

Research paper thumbnail of Tectonic deformation of the Andes and the configuration of the subducted slab in central Peru; results from a microseismic experiment

Geophysical Journal International, 1990

Research paper thumbnail of The diffuse transition between the Zagros continental collision and the Makran oceanic subduction (Iran): microearthquake seismicity and crustal structure

Geophysical Journal International, 2007

SummaryThe nature of the transition between the Zagros intra-continental collision and the Makran... more SummaryThe nature of the transition between the Zagros intra-continental collision and the Makran oceanic subduction is a matter of debate: either a major fault cutting the whole lithosphere or a more progressive transition associated with a shallow gently dipping fault restricted to the crust. Microearthquake seismicity located around the transition between the transition zone is restricted to the west of the Jaz-Murian depression and the Jiroft fault. No shallow micro-earthquakes seem to be related to the NNW-SSE trending Zendan-Minab-Palami active fault system. Most of the shallow seismicity is related either to the Zagros mountain belt, located in the west, or to the NS trending Sabzevaran-Jiroft fault system, located in the north. The depth of microearthquakes increases northeastwards to an unusually deep value (for the Zagros) of 40 km. Two dominant types of focal mechanisms are observed in this region: low-angle thrust faulting, mostly restricted to the lower crust, and strik...

Research paper thumbnail of Seismotectonic, rupture process, and earthquake-hazard aspects of the 2003 December 26 Bam, Iran, earthquake

Geophysical Journal International, 2006

Research paper thumbnail of A strong seismic velocity contrast in the shallow mantle across the Zagros collision zone (Iran)

Geophysical Journal International, 2007

Research paper thumbnail of An aftershock study of the El Asnam (Algeria) earthquake of 1980 October 10

Geophysical Journal International, 1983

Research paper thumbnail of The Kozani-Grevena (Greece) earthquake of 13 May 1995 revisited from a detailed seismological study

Bulletin of the Seismological Society of America, 1997

The Kozani earthquake (Ms = 6.6) of 13 May 1995 is the strongest event of the decade in Greece an... more The Kozani earthquake (Ms = 6.6) of 13 May 1995 is the strongest event of the decade in Greece and occurred in a region of low seismic activity. Using regional data and the strong-motion record at the Kozani station, we relocate the mainshock at 40.183° N and 21.660° E, beneath the Vourinos massif at a depth of 14.2 km. We also compute a focal mechanism by body-waveform modeling at teleseismic distance, which confirms a normal mechanism. The most likely plane strikes 240° ± 1° N and dips 40° ± 1° N with a centroid depth of 11 ± 1 km. Modeling of the strong-motion record at Kozani confirms that nucleation started at the eastern termination of the bottom of the fault.Six days after the mainshock, we installed a network of 40 portable seismological stations for one week around the epicentral region. Several thousand aftershocks were recorded, among which we locate 622 with a precision better than 1 km. We compute 181 focal mechanisms that mostly show normal faulting. The aftershock sei...

Research paper thumbnail of Comparisons of the kinematics and deep structures of the Zagros and Himalaya and of the Iranian and Tibetan plateaus and geodynamic implications

Reviews of Geophysics, 2010

Research paper thumbnail of The M s= 6.2, June 15, 1995 Aigion earthquake (Greece): evidence for low angle normal faulting in the Corinth rift

Journal of Seismology, 1997

Research paper thumbnail of 3D crustal structure from local earthquake tomography around the Gulf of Arta (Ionian region, NW Greece)

Research paper thumbnail of Rayleigh wave group velocity tomography in the Aegean area

Research paper thumbnail of Continental collision, gravity spreading, and kinematics of Aegea and Anatolia

Tectonics, 2000

We have carried out experiments using a layered medium of sand and silicone to investigate the la... more We have carried out experiments using a layered medium of sand and silicone to investigate the lateral extrusion of a material which spreads over its own weight while being compressed by the advance of a rigid indenter. Boundary conditions in the box mimic those prevailing in the Anatolian‐Aegean system. Both shortening in front of the rigid piston, which models the northward motion of Arabia, and extension resulting from the gravity spreading of the sand‐silicone layer are necessary to initiate the lateral extrusion. Strike‐slip faults accommodate the lateral escape and link the normal faults accompanying gravity spreading with the thrust faults in front of the rigid indenter. Strike‐slip faults begin to accommodate extrusion at a late stage in the experiments after the normal and thrust faults have developed. Experiments also show that the initial geometry of the boundary of the spreading layer may result in the formation of two arcs behind which material extends, in a manner anal...

Research paper thumbnail of Determination of Ground Displacements in the Seismic Zone of Vol VI, Greece

Survey Review, 1997

ABSTRACT In 1994, a resurvey of the geodetic control network in the seismic zone of Volvi, in Nor... more ABSTRACT In 1994, a resurvey of the geodetic control network in the seismic zone of Volvi, in Northern Greece (Mygdonian graben), was carried out using GPS techniques. The coordinates of the network stations as computed during the 1994 campaign were then compared with the original coordinates of the same stations as determined in 1979 by triangulation. The comparison between the two sets of data shows that this part of the Mygdonian graben experienced a N-S extension of about 8cm between 1979 and 1994 (5mm/year of horizontal extension).

Research paper thumbnail of Lithospheric structure of the Aegean obtained from P and S receiver functions

Journal of Geophysical Research: Solid Earth, 2006

Research paper thumbnail of Active deformation of the Corinth rift, Greece: Results from repeated Global Positioning System surveys between 1990 and 1995

Journal of Geophysical Research: Solid Earth, 2000

Between 1990 and 1995, we carried out seven Global Positioning System (GPS) campaigns in the Cori... more Between 1990 and 1995, we carried out seven Global Positioning System (GPS) campaigns in the Corinth rift area in order to constrain the spatial and temporal crustal deformation of this active zone. The network, 193 points over ∼10,000 km2, samples most of the active faults. In order to estimate the deformation over a longer period, 159 of those points are also Greek triangulation pillars previously measured between 1966 and 1972. Two earthquakes of magnitude 6.2 and 5.9 have occurred in the network since it was installed. The extension rate deduced from the analysis of the different GPS data sets is 14±2 mm/yr oriented N9° in the west, 13±3 mm/yr oriented S‐N in the center, and 10±4 mm/yr oriented N19°W in the east of the gulf. The comparison between GPS and triangulation gives higher rates and less angular divergence (25±7 mm/yr, N4°E; 22±7 mm/yr, S‐N; 20±7 mm/yr, N15°W, respectively). Both sets of data indicate that the deforming zone is very narrow (10–15 km) in the west, might ...

Research paper thumbnail of The Kozani-Grevena (Greece) earthquake of May 13, 1995, a seismological study

Journal of Geodynamics, 1998

Research paper thumbnail of GPS network monitors the Arabia-Eurasia collision deformation in Iran

Research paper thumbnail of Rapid N-S extension in the Mygdonian Graben (northern Greece) deduced from repeated geodetic surveys

Geophysical Research Letters, 1997

Research paper thumbnail of Variation of Moho depth in the central part of the Alborz Mountains, northern Iran

Geophysical Journal International, 2010

Research paper thumbnail of The 2003 December 26 Bam earthquake (Iran),Mw6.6, aftershock sequence

Geophysical Journal International, 2005

Research paper thumbnail of Active tectonics of the Algerian Atlas Mountains-evidence from aftershocks of the 1980 El Asnam earthquake

Geophysical Journal International, 1989

Research paper thumbnail of Tectonic deformation of the Andes and the configuration of the subducted slab in central Peru; results from a microseismic experiment

Geophysical Journal International, 1990

Research paper thumbnail of The diffuse transition between the Zagros continental collision and the Makran oceanic subduction (Iran): microearthquake seismicity and crustal structure

Geophysical Journal International, 2007

SummaryThe nature of the transition between the Zagros intra-continental collision and the Makran... more SummaryThe nature of the transition between the Zagros intra-continental collision and the Makran oceanic subduction is a matter of debate: either a major fault cutting the whole lithosphere or a more progressive transition associated with a shallow gently dipping fault restricted to the crust. Microearthquake seismicity located around the transition between the transition zone is restricted to the west of the Jaz-Murian depression and the Jiroft fault. No shallow micro-earthquakes seem to be related to the NNW-SSE trending Zendan-Minab-Palami active fault system. Most of the shallow seismicity is related either to the Zagros mountain belt, located in the west, or to the NS trending Sabzevaran-Jiroft fault system, located in the north. The depth of microearthquakes increases northeastwards to an unusually deep value (for the Zagros) of 40 km. Two dominant types of focal mechanisms are observed in this region: low-angle thrust faulting, mostly restricted to the lower crust, and strik...

Research paper thumbnail of Seismotectonic, rupture process, and earthquake-hazard aspects of the 2003 December 26 Bam, Iran, earthquake

Geophysical Journal International, 2006

Research paper thumbnail of A strong seismic velocity contrast in the shallow mantle across the Zagros collision zone (Iran)

Geophysical Journal International, 2007

Research paper thumbnail of An aftershock study of the El Asnam (Algeria) earthquake of 1980 October 10

Geophysical Journal International, 1983