A5016105378- earthquake and tectonic studies
- Geology and Paleoclimatology Research
- Marine and environmental studies
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Maritime and Coastal Archaeology
- Geological formations and processes
- Geomagnetism and Paleomagnetism Studies
- Earthquake Detection and Analysis
- Archaeology and ancient environmental studies
- Geophysical and Geoelectrical Methods
- Seismic Waves and Analysis
- Seismic Imaging and Inversion Techniques
- Seismology and Earthquake Studies
- Rock Mechanics and Modeling
- Landslides and related hazards
- Geological and Geophysical Studies
- Geophysical Methods and Applications
- Archaeology and Historical Studies
- Isotope Analysis in Ecology
- Hydrocarbon exploration and reservoir analysis
- Coastal and Marine Dynamics
- Methane Hydrates and Related Phenomena
- Geochemistry and Geologic Mapping
- Hydraulic Fracturing and Reservoir Analysis
Hebrew University of Jerusalem
2016-2025
York University
2023
Melnikov Permafrost Institute of the Siberian Branch of the Russian Academy of Science
2023
Jerusalem College of Technology
2020
Hebrew College
2004
University of California, Berkeley
1988-1990
Abstract A comprehensive record of lake level changes in the Dead Sea has been reconstructed using multiple, well dated sediment cores recovered from shore. Interpreting as monitors precipitation drainage area and regional eastern Mediterranean palaeoclimate, we document presence two major wet phases (∼ 10–8.6 ∼ 5.6–3.5 cal kyr BP) multiple abrupt arid events during Holocene. The Holocene appear to coincide with breaks Near East cultural evolution (at 8.6, 8.2, 4.2, 3.5 BP). Wetter periods...
The temporal distribution of earthquakes in the Dead Sea Graben is studied through a 50,000‐year paleoseismic record recovered laminated sediments Late Pleistocene Lake Lisan (paleo‐Dead Sea). represents more than 10 times 4000 years historical earthquake records. It longest and most complete along Transform possibly continuous on Earth. includes unique exposures seismite beds (earthquake‐induced structures) associated with slip events syndepositional faults. seismites are layers consisting...
Abstract Lake Lisan, the late Pleistocene precursor of Dead Sea, existed from ∼70,000 to 15,000 yr B.P. It evolved through frequent water-level fluctuations, which reflected regional hydrological and climatic conditions. We determined water level lake for time interval ∼55,000–15,000 cal by mapping offshore, nearshore, fan-delta sediments; application sequence stratigraphy methods; dating with radiocarbon U-series methods. During studied lake-level fluctuated between ∼340 160 m below mean...
We present a formulation for mechanical modeling of geological processes in the seismogenic crust using damage rheology. The layer is treated as an elastic medium where distributed damage, modifying stiffness, evolves function deformation history. model rheology based on thermodynamic principles and fundamental observations rock deformation. theoretical analysis leads to kinetic equation evolution having two principal coefficients. first criterion transition between strength degradation...
Research Article| May 01, 2004 Late Holocene lake levels of the Dead Sea R. Bookman (Ken-Tor); (Ken-Tor) 1Institute Earth Sciences, The Hebrew University Jerusalem, Jerusalem 91904, Israel and Geological Survey Israel, 30 Malkhe Street, 95501, Search for other works by this author on: GSW Google Scholar Y. Enzel; Enzel 2Institute Department Geography, 91905, A. Agnon; Agnon 3Institute M. Stein 4Institute Author Article Information Publisher: Society America Received: 26 Oct 2002 Revision 17...
A 2000 year paleoseismic record of the Dead Sea area was recovered from a lacustrine sedimentary section. The section is being exposed at Ze'elim Terrace on shores due to fast retreat lake. consists laminated detrital and chemical (mainly aragonite) sediments that were deposited in Holocene paleo‐Dead Sea. Eight layers show deformed structures are identified as seismites. Their chronology determined by radiocarbon dating organic remains. seismite ages well correlated with historically...
Research Article| August 01, 1995 Prehistoric earthquake deformations near Masada, Dead Sea graben Shmuel Marco; Marco 1Institute of Earth Sciences, Hebrew University, Jerusalem 91904, Israel2Geological Survey Israel, 30 Malkhe 95501, Israel Search for other works by this author on: GSW Google Scholar Amotz Agnon Author and Article Information Publisher: Geological Society America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print 0091-7613 Geology (1995) 23 (8): 695–698....
We study the coupled evolution of earthquakes and faults in a model consisting seismogenic upper crust governed by damage rheology over viscoelastic substrate. The has two types functional coefficients: (1) “generalized internal friction” separating states associated with material degradation healing (2) rate coefficients for positive (degradation) negative (healing) changes. evolving modifies effective elastic properties as function ongoing deformation. This simulates creation fault systems...
The observation of localized stationary structures, coined oscillons, in granular media has evoked much interest. By parametric excitation clay suspensions, we demonstrate a hysteretic transition to oscillon-type states nongranular medium. When the symmetry up-down $\mathrm{reflection}+\mathrm{time}$ translation is lost, these undergo propagating previously seen Newtonian fluids. These observations are accord with recent theoretical predictions sufficient conditions for oscillon formation....
Research Article| April 01, 1998 Crusader castle torn apart by earthquake at dawn, 20 May 1202 Ronnie Ellenblum; Ellenblum 1Department of Geography, Hebrew University, Jerusalem 91905, Israel Search for other works this author on: GSW Google Scholar Shmuel Marco; Marco 2Geological Survey, 30 Malkhei Israel, 95501, Amotz Agnon; Agnon 3Institute Earth Sciences, 91904, Thomas Rockwell; Rockwell 4Department Geological San Diego State Diego, California 92182 Adrian Boas 5Institute Archaeology,...
The freshwater Lake Kinneret (Sea of Galilee) and the hypersaline Dead Sea are remnant lakes, evolved from ancient water bodies that filled tectonic depressions along Transform (DST) during Neogene–Quartenary periods. We reconstructed limnological history (level composition) past ∼40,000 years compared it with contemporaneous Lisan aspect regional global climate history. lake level reconstruction was achieved through a chronological sedimentological investigation exposed sedimentary sections...
The Dead Sea Transform is a major strike‐slip fault bounding the Arabia plate and Sinai subplate. On basis of two GPS campaign measurements, 6 years apart, at 17 sites distributed in Israel Jordan, complemented by Israeli permanent stations, we compute present‐day deformation across southern segment Transform, Wadi Araba fault. Elastic locked‐fault modeling fault‐parallel velocities provides slip rate 4.9 ± 1.4 mm/a best fit locking depth ∼12 km. This slightly higher than previous results...
To address one of the central questions plate tectonics—How do large transform systems work and what are their typical features?—seismic investigations across Dead Sea Transform (DST), boundary between African Arabian plates in Middle East, were conducted for first time. A major component these was a combined reflection/refraction survey territories Palestine, Israel Jordan. The main results this study are: (1) seismic basement is offset by 3–5 km under DST, (2) DST cuts through entire...
[1] A comprehensive multisite paleoseismic archive of the late Holocene Dead Sea basin (past 2500 years) is established by constructing two age-depth chronological models sedimentary sections exposed at retreating shores modern Sea. Two new study sites studied are Ein Feshkha Nature Reserve outcrop located northern part and close to an active underwater transverse fault east Ze'elim Gully southern basin. Age-depth regression calculated for these based on atmospheric radiocarbon ages...
SUMMARY We address the gradual transition from brittle failure to cataclastic flow under increasing pressures by a new model, incorporating damage rheology with Biot’s poroelasticity. Deformation of porous rocks is associated growth two classes internal flaws, namely cracks and pores. Cracks act as stress concentrations promoting failure, whereas pores dissipate leading distributed deformation. The present analysis, based on thermodynamic principles, leads system coupled kinetic equations...
Research Article| April 01, 2005 Dating large infrequent earthquakes by damaged cave deposits Elisa J. Kagan; Kagan 1Institute of Earth Sciences, Hebrew University Jerusalem, Jerusalem 91904, Israel, and Geological Survey 30 Malkhe Israel Street, 95501, Search for other works this author on: GSW Google Scholar Amotz Agnon; Agnon 2Institute Miryam Bar-Matthews; Bar-Matthews 3Geological Avner Ayalon Author Article Information Publisher: Society America Received: 14 Sep 2004 Revision 22 Dec...
Fault zones are the locations where motion of tectonic plates, often associated with earthquakes, is accommodated. Despite a rapid increase in understanding faults last decades, our knowledge their geometry, petrophysical properties, and controlling processes remains incomplete. The central questions addressed here study Dead Sea Transform (DST) Middle East as follows: (1) What structure kinematics large fault zone? (2) controls its kinematics? (3) How does DST compare to other plate...