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Geology/Regarding tremors

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Question
Hi,

Once in this year, earthquake happened in Iran and at the same time, tremors were felt in Dubai. I didn't hear any news regarding earthquake/tremors occurring in the regions between Dubai and Iran. How is this possible?

Also in some places many times tremors are felt for few seconds and nothing major happens, then everything gets back to normal. I have seen building shook for few seconds. The next day, nothing happens. If building shook, it should have lost its current stable position but I wonder nothing happens in subsequent days, what is the reason for this?

Regards

Answer
Dear Ameen
Earthquakes -resulted due to surface- sub surface -tectonic causes
All earthquakes will not do the distractions to buildings and infra-structural construction
However it depends upon the magnitude -of the earthquakes-Generally up to 4- Richter Scale of magnitude will not do considerable damage.
Minor earth tremors result to shakes the buildings grounds but will not do damage-
Presently buildings are constructing using earth quake resistant structures-Earthquake engineering -gives more in puts to -use of the technology to build structures
Earthquake may happen any part of the globe-However highly seismic zones gets frequent earthquakes-
Earthquake struck to region -its waves travels to all directions
You can read the basic books-or web sites
You can read my book Engineering Geology Major chapter on earthquakes with Earthquake tipps
***********************************************************************************
General Principles for earthquake resistant designs and construction (IS 4326-1976, Bureau of Indian Standards)
1.   The building, particularly roofs and upper storeys, shall be as light as possible.
2.   As far as possible, the building shall be tied together in such a manner that the building shall act as one unit. Crumple sections shall be provided.
3.   Projecting parts shall be avoided and if that is not possible they shall be properly reinforced and firmly tied to the main structure. Suspended ceilings and ceiling plaster shall be avoided.
4.   To minimise torsion, the building should have a simple rectangular plan and be symmetrical with respect to mass and rigidity coincide with each other.
5.   Buildings with plans with shapes like L, T, E and T shall preferably be separated into rectangular parts by providing separation sections at appropriate places.
6.   The structure shall be designed to have sufficient strength against earthquakes along both the horizontal and vertical axes.
7.   The main structural elements and their connections shall be designed to have a ductile failure. This will allow the structure to absorb energy during earthquakes and avoid sudden collapse of the structure.
8.   Suitable details shall be worked out to connect the non-structural parts with the structural framing so that the deformation of the structural frame leads to minimum damage of the non-structural elements.
9.   Fire frequently follows an earthquake. Therefore, buildings shall be constructed to make them fire-resistant
*********************************************************************************************
Engineering Geology by D.Venkat Reddy, Vikas Publishing House Pvt. Ltd., New Delhi, (2010), 658 pages.

   
         BOOK REVIEW

Recently a new book released entitled "Engineering Geology" written by Dr. D. Venkat Reddy, Professor of Engineering Geology, National Institute of Technology, Surathkal, Karnataka published by Vikas publishing house Pvt. limited, New Delhi. This book provides an excellent understanding of applied facet of geological science and engineering.
  The first few chapters of book explained very noticeably and concisely basic understanding of diverse geological aspects which is required for any field geologist, engineer and practicing scientist.
  The initial chapter present a concise and articulate introduction to various branches and sub branches of geological sciences and engineering. Subsequently the book deals with the earth interior and importance of understanding the earth crust, along introduction to the engineering geological phenomenon and its applications for development of society. The fundamentals of mineralogy, petrology and structural geology have been given passable concentration. The geomorphological frame work of hydrosphere comprising the structural drainage, marine erosion and ground water have been discussed from the point of view of civil engineers and engineering geologist. A good discussion has been specified of seismic hazards and structural protective design to be considered in earthquake prone areas.
  The author has discussed specific problem encountered in civil and mining engineering such as building sites, slope stability of natural rockmass as well as dump material, geo-hazards, pillar design, rock mechanics, bridge design, dam and reservoirs, tunnel and large size tunnel excavation. Application and utility of remote sensing and GIS have been briefly explained. Chapter of Stratigraphy of India and environmental geology is very useful for earth scientist and engineers for day to day working on the project site.
  The book provide an excellent understanding of engineering geology and has enormous use to earth scientist, practising engineer and civil engineers who can exchange ideas during execution of projects. This book provides support and practical guidance to those seeking help to guard the Mother earth while understanding it appropriately and accurately. In addition, the book is suitable for student of geology, geophysics, civil and mining engineers. The book provides an excellent understanding of rock engineering which will immensely benefit student, teachers, professionals and designer.
Professor D.Venkat Reddy deserve our gratitude for providing priceless reading material for practising geoscientist who are fascinated for meaning full balance to eco- system for sustainable development. It is equally good for a graduate who has just going ahead his career, to senior professional concerned in capitalising on his vast experience, this book provides solid possibility.
T.N.Singh,
Department of Earth Sciences,
Indian Institute of technology,Bombay,
Powai,
Mumbai-400 076  

Geology

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Dr D.Venkat Reddy

Expertise

Engineering Geology,Mining geology,commercial petrology,Decorative and dimensional stones,Hydrogeology

Experience

20years texhing and reserch expireience in geology,enginnering geology for graduate and undergraduate students-reserch guidance,10years field exoireience conducting field camps for geology students=Presently Assistant professor in geolog

Organizations
NITK-National Institute of Technology,Surathkal,Mangalore-DK,India Geology section Dept of Civil Engineering

Publications
published 70 research papers.( 4 books)- Editor in Chief-International Journal of Earth Sciences and Engineering -1.Engineering Geology for civil Engineers-oxford &IBH pub-1996] 2.Decorative and dimensional stones of India-CBS Pub-1997 3.Engineering Geology-Vikaspublishers2010 4.Applied Geology-Vikaspub-2010

Education/Credentials
MSC(GEOLOGY),Osmania university,India, MSC(Tech )Hydrogeology,OU,India PhD(GEOLOGY)OU,India

Awards and Honors
Distinguishing Indian Award Editor in chief-International Journal of Earth Sciences and Engineering (www.cafetinnova.org)

Past/Present Clients
PRESENTLY WORKING =Professor of Geology-Dept of Civil Engineering NITK-INDIA

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