Один из первых опытов работы сейсмологов на археологических памятниках Кыргызстан. В данном случае – на изучаемом нами городище Новопокровское-2. Со-авторы-археологи не во всём согласны с категоричностью выводов коллег-сейсмологов, но и... more
Один из первых опытов работы сейсмологов на археологических памятниках Кыргызстан. В данном случае – на изучаемом нами городище Новопокровское-2. Со-авторы-археологи не во всём согласны с категоричностью выводов коллег-сейсмологов, но и такая интерпретация чисто археологических фактов также имеет право на существование.
We have a complex of archaeological, archaeoseismological and seismotectonic works Salachik was held—the ancient capital of the Crimean khans on the outskirts of the modern city of Bakhchisarai (Crimea). Were identi fi ed considerable... more
We have a complex of archaeological, archaeoseismological and seismotectonic works Salachik was held—the ancient capital of the Crimean khans on the outskirts of the modern city of Bakhchisarai (Crimea). Were identi fi ed considerable damage and deformati on medieval buildings that survived unti l now, or in archaeological excavati ons: great slopes as much as the walls of buildings, extensions of certain structural elements, turns fragments of walls and individual building blocks around a verti cal axis, a signifi cant deformati on of arch structures, through cracks, piercing a few building blocks in a row. These complex deformati ons indicati ve of their seismogenic origin. We have found traces of at least two strong earthquakes in medieval monuments Salachik. At least for one of them using the kinemati c indicators able to identi fy the directi on of arrival of the maximum (VIII ≤ I ≤ IX points) seismic vibrati ons from the west. According to historical seismology was also determined by the age of one of the earthquake: April . The buildings Salachik are also damage caused by earthquakes in . These materials must serve the purpose of a more accurate assessment of seismic hazard the Crimean peninsula.
Historical earthquakes play a notable role in engineering seismology. The historical Kashan-Sialk region, 3 Km south of Kashan, was surveyed in the viewpoint of historical earthquakes events. Several devastating historical earthquakes,... more
Historical earthquakes play a notable role in engineering seismology. The historical Kashan-Sialk region, 3 Km south of Kashan, was surveyed in the viewpoint of historical earthquakes events. Several devastating historical earthquakes, occurred in the BC time, identified based on archaeological studies and evidences gathered from field study. In this respect a variety of information, namely time of settlement evacuation due to a natural disaster, walls and roofs collapses, unusual positions of skeletons, cracks and fractures on bones and earth were investigated. Signs of destructions and archeoseismology evidences suggested that an earthquake, with a magnitude of about 7, completely destroyed the Sialk hill. Kashan fault was introduced as an active and causative fault for this event. Effective distance from source (mezoseismic radius of Ambraseys), was used for the events which no evidences were available for their estimation. An empirical magnitude-radius relation was calculated, using regression on Ambraseys historical earthquakes catalogue to assign minimum magnitude to historical seismic events. Finally, a seismicity catalogue for Sialk ancient region and the neighboring area was prepared.
Charlemagne (Charles the Great) placed the centre of his kingdom during Carolingian times in Aachen, Germany (Aquisgrana). This medieval period and his regency are associated with a period of extensive constructions in Aachen, including... more
Charlemagne (Charles the Great) placed the centre of his kingdom during Carolingian times in Aachen, Germany (Aquisgrana). This medieval period and his regency are associated with a period of extensive constructions in Aachen, including the Carolingian part of the Aachen cathedral. The cathedral was the first building in Germany to join the UNESCO World Heritage list. The foundations and construction ground of the cathedral were excavated during recent archaeological and geotechnical investigations. The cathedral is founded on pillars and piles in Devonian blue limestone and shale, covered by Pleistocene loess sediments. Remains of Roman buildings, such as thermae, are situated below this part of the cathedral. The pillars are connected by up to 5 m deep foundation walls and are up to 2.4 m thick. Even though information about the construction site is important for the assessment of structural health and remediation measures, it is often rare for old historical buildings. Documentations from construction time concentrate on the construction progress and financial aspects. Detailed descriptions on the foundation ground and techniques are usually not preserved. This information is of relevance for assessment of earthquake related structural damages and site effects on construction. Investigations in the course of remediation measures or archaeological surveys fill this information gap. They provide insights in the ancient foundation techniques and can be used for identifying earthquake related phenomena in the construction site. Furthermore, a direct insight into potential seismic effects associated with the ground and building response on seismic shaking becomes possible. In the case of the Aachen cathedral, typical geotechnical investigation methods including drilling and laboratory tests were applied together with GPR measurements to evaluate the construction ground and evaluate potential seismological effects.
During archaeological and geotechnical investigations, the Carolingian part of the Aachen Cathedral (Germany) was excavated. The Aachen Cathedral was the first building in Germany to join the UNESCO World Heritage list. In the rock walls... more
During archaeological and geotechnical investigations, the Carolingian part of the Aachen Cathedral (Germany) was excavated. The Aachen Cathedral was the first building in Germany to join the UNESCO World Heritage list. In the rock walls of the fundament and medieval floors, open cracks were found. Subsidence of the mortar floor of about 50 cm with lateral dragging, which was reconstructed during the construction of the Cathedral, can be observed. The main building is founded on Devonian limestones and shales, Pleistocene loess and Roman urban debris. The loess and loamy sediments show angular cracks and fragments, which are not related to permafrost features but are interpreted as shear and extensional fractures. Some of the cracks are filled with black clay from below as they open downwards. These structures are interpreted as injection features caused by thixotropy of clays. Open cracks, lateral spread and injections structures occur usually during earthquakes with a magnitude higher than 5.5.The historical German earthquake catalogues provide three important passages for historical earthquakes in the region of Aachen. Both fall into a relatively short time interval. One occurred in winter 803 AD, another one in 823 AD, and the last one in 829 AD between Ash Wednesday and Easter. Both notes tell of earthquake shaking and significant structural damage and fatalities. This and the constructional history allowed dating of the event, favouring the 803 AD event as the causative damaging earthquake observed in the Aachen Cathedral.
