EXPLANATORY NOTES:

These maps have been prepared to indicate the earthquake hazard of Iran in the forms of so-acceleration contour lines, and seismic hazard zonations by utilizing the current probabilistic procedures. Probabilistic estimations obtained from these maps include Peak Ground Acceleration (PGA) for return periods of 75 and 475 years. The maps have been divided into intervals of 0.25 degrees in both latitudinal and longitudinal directions for calculating the peak ground acceleration values at each grid point and drawing seismic hazard curves. They are intended to form a pattern for the assessment of the seismic hazard concerning engineering structures. Moreover, they may also be used for other purposes, such as the preparation of seismic risk maps, the estimation of earthquake insurance premiums, and the preliminary site evaluation of critical facilities. Therefore, the first number on the  contour lines can be used to estimate the Design Basis Earthquake (DBE) for most structures with an average lifetime of about 50 years  whereas, the number in parenthesis may indicate the Maximum Probable Earthquake (MPE) for the same structures in any particular area. Since only major known sources have been considered in preparation of these maps, it is recommended that for important type of structures, site specific studies which require deterministic hazard investigations, and identified local seismic sources on large scale maps to be performed. 
 Main parameters for the probabilistic seismic hazard assessment conducted in the preparation of these maps can be summarized as follows:

1. Macroseismic, historical and instrumental seismic data.

2. Seismic source regionalization.

3. Source seismicity information which includes “Recurrence relationships” and “Maximum magnitudes”.

4. Attenuation relationships of the strong ground motion.

5. Probabilistic recurrence forecasting which includes homogeneous Poisson seismic occurrences and  the seismic hazard model (line and area sources).

What is GIS?

Simply put, a GIS combines layers of information about a place to give you a better understanding of that place. What layers of information you combine depends on your purpose—finding the best location for a new store, analyzing environmental damage, viewing similar crimes in a city to detect a pattern, and so on.

Why Use GIS?

Improve Organizational Integration One of the main benefits of GIS is improved management of your organization and resources. A GIS can link data sets together by common locational data, such as addresses, which helps departments and agencies share their data. By creating a shared database, one department can benefit from the work of another—data can be collected once and used many times.

How To Use GIS?

Mapping Where Things Are Mapping where things are lets you find places that have the features you are looking for and to see where to take action.
Find a feature—People use maps to see where or what an individual feature is. Finding patterns—By looking at the distribution of features on the map instead of just an individual feature, you can see patterns emerge. 

 

MAP ORDER

Specification of seismic hazard map of iran
Scale: 1:5000000
Prepared from 1:2000000 map of seismicity and active faults of Iran. This map is prepared to indicate the earthquake hazard of Iran in the forms of Iso-acceleration contour lines, and seismic hazard zonations by utilizing the current probabilistic procedures.
 

Size	Scale	Type of map	Price
A1	1:5000000	Seismic Hazard	2000
A0	1:2000000	Liquifaction	18000

For map order please contact to iiees@iiees.ac.ir .

Seismic Hazard

• Seismicity

• Hazard by City Code

• Seismotectonic Provinces

Map Information

• Catalog

• Seismic Hazard Report