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Paleoseismological
Paleoseismology is the study of ancient Earthquake, earthquakes using geologic evidence, such as geologic Sediment, sediments and Rock (geology), rocks. It is used to supplement Seismology, seismic monitoring to calculate seismic hazard. Paleoseismology is usually restricted to geologic regimes that have undergone continuous sediment creation for the last few thousand years, such as Swamp, swamps, Lake, lakes, river beds and shorelines. Methodology Procedure Paleoseismology studies start with finding an active fault. The definition of an active fault can vary, but it is usually based on having tectonically deformed quaternary-age materials that can potentially cause earthquakes. Satellite imaging with high resolution is often used to find such faults, but because of its resolution limitations, there are also other methods such as ground-penetrating radar (GPR), aeromagnetic surveys, and seismic reflection surveys. Faults can be dated in absolute terms using radiocarbon datin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Historical Earthquakes
Historical earthquakes is a list of significant earthquakes known to have occurred prior to the early 20th century. As the events listed here occurred before routine instrumental recordings, they rely mainly on the analysis of written sources, observations of shaking objects or animal behavior during earthquakes, religious/traditional beliefs about earthquakes (e.g. "God's punishment"). or the use of palaeoseismological techniques. There is often significant uncertainty in locations and magnitudes, and sometimes dates for each earthquakes. The number of fatalities is also often highly uncertain, particularly for the older events. Pre-11th century 11th–16th centuries 17th century 18th century 19th century Source for all events with 'USGS' labelled as the source United States Geological Survey (USGS''Note: Magnitudes are generally estimations from intensity data. When no magnitude was available, the Mercalli intensity scale, maximum intensity, written as a Roman num ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
