Which institutions can I have ground surveys (Soil Investigation) and building examination for earthquakes?

Detailed information can be obtained from the chambers of geology, geophysics, civil engineers, universities and building control companies.

Why do some countries or institutions give the different magnitude value of the earthquake after an earthquake and which causes that kind of difference?

Techniques for Calculating the Magnitude of an Earthquake
ML (Richter Scale): It was developed by Charles Richter in 1930 and is defined as the logarithm of the wave amplitude. All other scales were developed based on the Richter scale.

Ml: Calculated according to Richter’s original equation. It is used for shallow, local and small earthquakes (local magnitude).

Mb: Calculated based on the amplitude of the P and S waves (Body-wave magnitude).

Mb = log10(A/T) + Q(D,h)


A : amplitude (micron) of particle vibrations (ground motion);

T : period (seconds)

Q(D,h) correction factor, function of distance between epicentre and recorder (D -degrees) and focal depth (h -kilometers).
Md : Calculated using the duration of very small and local earthquakes (Duration magnitude)

MS : It is calculated from surface wave amplitude. (Surface-wave magnitude)

MS = log10 (A/T) + 1.66 log10 (D) + 3.30
Mw : The seismic moment (Moment magnitude) of the energy released.
seismic moment; It is a measure of the magnitude of the earthquake source and is calculated as follows;

Here, m is the resistance of the rocks to the shear stress, A is the ruptured (ie sliding) section of the fault level, and u is the average displacement, that is, the slippage, that occurs along the fault. A very important point here is that there is a relationship between u and fault length. The more u, the longer the fault should be.

Moment magnitude is calculated by the formula:

Mw = 2/3 log10(MO) – 10.7
Me : The amount of energy released by the earthquake, the measure of the damage potential in the structures (The energy unit is erg here.)
Me =2/3 log10E-9.9
For every 1 unit increase in magnitude, the amount of seismic energy increases approximately 32 times.
After any earthquake that has occurred, giving different values for the magnitude of the earthquake and differences between countries or institutions; it is usually due to the different computational techniques mentioned above.

What are the documents requested from the interested parties who requested the “opinion” of the Earthquake and Soil Investigation Directorate on the proposals for the Master Zoning Plan and the Implementation Zoning Plan?

  • Title deed / title deed registration certificate obtained at most three (3) months before the application date or a document to replace these documents (Notarized)
  • Circular of signature of the owners mentioned in this document, if the owners do not apply, notarized consent/power of attorney
  • Samples of marked maps of the parcel or parcels belonging to the offer
  • The proposal plan sheet prepared on the current plan/current maps by the author and the author’s organizations that will undertake the construction of the zoning plans and approved by the relevant professional chamber
  • Plan Explanation Report, which includes the Examinations and Researches prepared with the qualification and content stipulated in the Regulation on the Principles of Plan Making
    Chamber of City Planners office registration certificate.