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1033 Jordan Rift Valley Earthquake
An earthquake struck the Jordan Rift Valley on December 5, 1033 and caused extreme devastation in the Levant region. It was part of a sequence of four strong earthquakes in the region between 1033 AD and 1035 AD. Scholars have estimated the moment magnitude to be greater than 7.0 and evaluated the Modified Mercalli intensity to X (''Extreme''). It triggered a tsunami along the coast of modern-day Israel and Palestine, causing damage and fatalities. At least 70,000 people were killed in the disaster. Tectonic setting In the past 2,000 years of human history, documented earthquakes have been associated with the long Dead Sea Transform Fault System, a left-lateral transform boundary. Since the early Miocene, the fault system has accounted for between and of left-lateral displacement between the African and Arabian Plates. While left-lateral strike-slip is dominant, the fault also display features of normal and thrust faulting. The fault displays varying slip rates across its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strike-slip
In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic forces, with the largest forming the boundaries between the plates, such as the megathrust faults of subduction zones or transform faults. Energy release associated with rapid movement on active faults is the cause of most earthquakes. Faults may also displace slowly, by aseismic creep. A ''fault plane'' is the plane that represents the fracture surface of a fault. A ''fault trace'' or ''fault line'' is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geologic maps to represent a fault. A ''fault zone'' is a cluster of parallel faults. However, the term is also used for the zone of crushed rock along a single fault. Prolonged motion along closely spaced faults can blur the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thrust Fault
A thrust fault is a break in the Earth's crust, across which older rocks are pushed above younger rocks. Thrust geometry and nomenclature Reverse faults A thrust fault is a type of reverse fault that has a dip of 45 degrees or less. If the angle of the fault plane is lower (often less than 15 degrees from the horizontal) and the displacement of the overlying block is large (often in the kilometer range) the fault is called an ''overthrust'' or ''overthrust fault''. Erosion can remove part of the overlying block, creating a ''fenster'' (or ''window'') – when the underlying block is exposed only in a relatively small area. When erosion removes most of the overlying block, leaving island-like remnants resting on the lower block, the remnants are called ''klippen'' (singular ''klippe''). Blind thrust faults If the fault plane terminates before it reaches the Earth's surface, it is referred to as a ''blind thrust'' fault. Because of the lack of surface evidence, blind thr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ramla
Ramla or Ramle ( he, רַמְלָה, ''Ramlā''; ar, الرملة, ''ar-Ramleh'') is a city in the Central District of Israel. Today, Ramle is one of Israel's mixed cities, with both a significant Jewish and Arab populations. The city was founded in the early 8th century CE by the Umayyad prince Sulayman ibn Abd al-Malik as the capital of Jund Filastin, the district he governed in Bilad al-Sham before becoming caliph in 715. The city's strategic and economic value derived from its location at the intersection of the ''Via Maris'', connecting Cairo with Damascus, and the road connecting the Mediterranean port of Jaffa with Jerusalem. It rapidly overshadowed the adjacent city of Lydda, whose inhabitants were relocated to the new city. Not long after its establishment, Ramla developed as the commercial centre of Palestine, serving as a hub for pottery, dyeing, weaving, and olive oil, and as the home of numerous Muslim scholars. Its prosperity was lauded by geographers in the 10 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Institute Of Geophysics And Volcanology
The National Institute of Geophysics and Volcanology ( it, Istituto Nazionale di Geofisica e Vulcanologia, INGV) is a research institute for geophysics and volcanology in Italy. INGV is funded by the Italian Ministry of Education, Universities and Research The Ministry of Education, University and Research (in it, Ministero dell'Istruzione, dell'Università e della Ricerca, italic=no or MIUR) is the ministry of the Italian government for the national education system, the Italian universities and .... Its main responsibilities within the Italian civil protection system are the maintenance and monitoring of the national networks for seismic and volcanic phenomena, together with outreach and educational activities for the Italian population. The institute employs around 2000 people distributed between the headquarters in Rome and the other sections in Milan, Bologna, Pisa, Naples, Catania and Palermo. INGV is amongst the top 20 research institutions in terms of scientific publi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tectonophysics (journal)
''Tectonophysics, The International Journal of Geotectonics and the Geology and Physics of the Interior of the Earth'' is a weekly peer-reviewed scientific journal published by Elsevier. It was established in 1964 and covers the field of tectonophysics, including kinematics, structure, composition, and dynamics of the solid Earth at all scales. Organization The editors-in-chief are Philippe Agard (Pierre and Marie Curie University), Jean-Philippe Avouac (California Institute of Technology), Ramon Carbonell (Spanish National Research Council), Rob Govers (Utrecht University), Zheng Xiang Li (Curtin University), and Kelin Wang (Geological Survey of Canada). Abstracting and indexing This journal is abstracted and indexed in over fifty databases, including Current Contents, GeoRef, Inspec, Scopus and Web of Science. Notable articles According to the ''Journal Citation Reports'', ''Tectonophysics'' has a 2011 impact factor The impact factor (IF) or journal impact factor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seismic Magnitude Scales
Seismic magnitude scales are used to describe the overall strength or "size" of an earthquake. These are distinguished from seismic intensity scales that categorize the intensity or severity of ground shaking (quaking) caused by an earthquake at a given location. Magnitudes are usually determined from measurements of an earthquake's seismic waves as recorded on a seismogram. Magnitude scales vary on what aspect of the seismic waves are measured and how they are measured. Different magnitude scales are necessary because of differences in earthquakes, the information available, and the purposes for which the magnitudes are used. Earthquake magnitude and ground-shaking intensity The Earth's crust is stressed by tectonic forces. When this stress becomes great enough to rupture the crust, or to overcome the friction that prevents one block of crust from slipping past another, energy is released, some of it in the form of various kinds of seismic waves that cause ground-shaking, o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surface Rupture
In seismology, surface rupture (or ground rupture, or ground displacement) is the visible offset of the ground surface when an earthquake rupture along a fault affects the Earth's surface. Surface rupture is opposed by buried rupture, where there is no displacement at ground level. This is a major risk to any structure that is built across a fault zone that may be active, in addition to any risk from ground shaking. Surface rupture entails vertical or horizontal movement, on either side of a ruptured fault. Surface rupture can affect large areas of land. __TOC__ Lack of surface rupture Not every earthquake results in surface rupture, particularly for smaller and deeper earthquakes. In some cases, however, the lack of surface effects is because the fault that moved does not reach the surface. For example, the 1994 Northridge earthquake had a moment magnitude of 6.7, caused major damage in the Los Angeles area, occurred at below the Earth's surface, but did not cause surface ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleoseismology
Paleoseismology looks at geologic sediments and rocks, for signs of ancient earthquakes. It is used to supplement seismic monitoring, for the calculation of seismic hazard. Paleoseismology is usually restricted to geologic regimes that have undergone continuous sediment creation for the last few thousand years, such as swamps, lakes, river beds and shorelines. In this typical example, a trench is dug in an active sedimentation regime. Evidence of thrust faulting can be seen in the walls of the trench. It becomes a matter of deducting the relative age of each fault, by cross-cutting patterns. The faults can be dated in absolute terms, if there is dateable carbon, or human artifacts. Many notable discoveries have been made using the techniques of paleoseismology. For example, there is a common misconception that having many smaller earthquakes can somehow 'relieve' a major fault such as the San Andreas Fault, and reduce the chance of a major earthquake. It is now known (u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulletin Of The Seismological Society Of America
''Bulletin of the Seismological Society of America'' (BSSA) is a bimonthly peer reviewed scientific journal published by the Seismological Society of America. The editor-in-chief is Thomas Pratt ( U. S. Geological Survey). The journal covers seismology and related disciplines. Topical coverage includes theory and observation of seismic waves, specific earthquakes, the structure of the Earth, earthquake sources, hazard and risk estimation, and earthquake engineering. Publishing formats include regular papers and short notes. Publication has been continuous since 1911. Abstracting and indexing This journal is indexed by the following services:Hollis Classic Library Harvard College. 2009 [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
31 BC Judea Earthquake
The 31 BC Judea earthquake is mentioned in catalogues of historical earthquakes. It affected the Herodian Kingdom of Judea in the Holy Land.Karcz, 2004, p. 774-778 Josephus' narrative The main source on the earthquake is a passage in ''Antiquities of the Jews'' by Josephus. It dates the earthquake to the time of the Battle of Actium (31 BC) between the forces of Octavian and Mark Antony. It also dates the earthquake to the 7th regnal year of Herod the Great (reigned 37–4 BC). According to Josephus, the earthquake brought destruction to Judea's cattle. He estimates that about 10,000 men perished due to debris from falling houses.Karcz, 2004, p. 774-778 The army of Judea reportedly suffered no harm, as they "lodged in the field" at the time of the earthquake. Arabians hostile to the Jews heard reports of the earthquake, and exaggerated the tale further to the point of reporting that Judea had fallen and that its men "were utterly destroyed". A number of Jewish ambassadors were slai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
749 Galilee Earthquake
A devastating earthquake known in scientific literature as the Earthquake of 749 struck on January 18, 749, in areas of the Umayyad Caliphate, with the epicenter in Galilee. The most severely affected areas were parts of Palestine and western Transjordan. The cities of Tiberias, Beit She'an, Pella, Gadara, and Hippos were largely destroyed while many other cities across the Levant were heavily damaged. The casualties numbered in the tens of thousands. There are firm reasons to believe that there were either two, or a series of earthquakes between 747 and 749, later conflated for different reasons into one, not least due to the use of different calendars in different sources.Karcz, 2004, p. 778-787 It seems probable that the second quake, centered more to the north, which created massive damage mainly in northern Israel and Jordan, did so not so much due to its catastrophic magnitude, but rather as a result of buildings being weakened by the previous, more southerly earthquake. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earthquake Rupture
In seismology, an earthquake rupture is the extent of slip that occurs during an earthquake in the Earth's crust. Earthquakes occur for many reasons that include: landslides, movement of magma in a volcano, the formation of a new fault, or, most commonly of all, a slip on an existing fault. Nucleation A tectonic earthquake begins by an initial rupture at a point on the fault surface, a process known as nucleation. The scale of the nucleation zone is uncertain, with some evidence, such as the rupture dimensions of the smallest earthquakes, suggesting that it is smaller than 100 m while other evidence, such as a slow component revealed by low-frequency spectra of some earthquakes, suggest that it is larger. The possibility that the nucleation involves some sort of preparation process is supported by the observation that about 40% of earthquakes are preceded by foreshocks. However, some large earthquakes, such as the M8.6 1950 India - China earthquake., have no foreshocks and it re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
