1. Building and Housing Research Center
Ministry of Housing & Urban Development
Building and Housing Research Center
Iran Strong Motion Network

2. Iran strong motion network (ISMN)

3. Tectonic map of the world

4. Seismicity of Iran ( )

5. 1002 (SSA-2) accelerographs 74 (SMA-1) accelerographs
Iran strong motion network (ISMN)
1002 (SSA-2) accelerographs
74 (SMA-1) accelerographs

6. Criteria for selection of stations in ISMN
The optimal choice of locations for installing the accelerographs is of great and significant important. There are some factors to be considered in location determinations.
1- Seismicity and seismotectonics
2- Regional geology
3- Reasonable coverage of various site conditions
4-Topography
5- Seismic hazard map of Iran
6- Important Structure (dams, high rise buildings, etc)
7- Local facilities (power, road, etc.)

7. Instruments of Iran strong motion network
Analogue accelerographs(SMA-1, 74operational)
Digital accelerographs (SSA-2, 1002operational)
Solid state recorder (SSR1, 4 ready for aftershock studies)
- Portable drum recorder(PS2, 1 ready for aftershock studies )

8. Instruments of Iran strong motion network
Digital accelerograph (SSA-2)
Analogue accelerograph (SMA-1)
Solid state recorder (SSR1)
Portable drum recorder(PS2)

9. Number of accelerographs of ISMN

10. Free field stations of ISMN

11. Number of accelerograms (4604) recorded by ISMN

12. PGA> 0.4g recorded in Iran

13. Peak Ground Acceleration recorded in Iran

14. Accelerogram of Rudbar Earthquake (20 June 1990)
Important accelerograms recorded in Iran
Accelerograms of Naghan earthquake ( 4 June 1977)
Accelerogram of Tabas earthquake (16 September 1978)
Accelerogram of Golbaf earthquake ( 28 July 1981)
Accelerogram of Rudbar Earthquake (20 June 1990)

15. Important accelerograms recorded in Iran
Accelerogram of Zanjiran earthquake( June 20, 1994)
Accelerogram of Sarein earthquake (Feb 28, 1997)
Accelerogram of Avaj earthquake( June 22, 2002)

16. Instrumentation of dams
Number of dams = 54
Number of accelerographs installed = 92
Accelerograms recorded in dams = 222

17. Rajaei dam (6 digital accelerographs)
Sefirood dam (3 digital accelerograph)
Jirooft dam (3 digital accelerographs)
Izadkhast dam (2 digital accelerographs

18. Structural array at the Ministry of Housing & Urban Development

19. Constituent materials
Classification of site geology of Iranian code of practice
groups
Constituent materials
Vs (m/sec) I
A) Igneous rocks (coarse and fine grained texture), hard and stiff sedimentary rocks and massive metamorphic Rocks (Gneiss, crystalline silicate rocks)
 b) Conglomerate beds, stiff soil (compact sand and gravel and stiff clay) with over 30 meters in thickness.
More than 750
More Than 750 II
a) Loose igneous rocks (such as tuff), friable sedimentary rocks, foliated metamorphic rocks and the rocks that have been loosened (decomposed) by weathering
 b) Stiff soil (compact sand and gravel and stiff clay) with thickness less than 30 meters..
375  Vs  750
 375  Vs  750
III
a) Rocks disintegrated by weathering
 b) Medium compaction soils, beds of gravel and sand with medium intragranular cementation bond and clay of an intermediate stiffness.
175  Vs 375
 175  Vs 375 IV
a) Soft and wet deposits resulted from high level of water table.
 b) Any kind of soil containing a 6-meter high clay layer less than 175 with cementation index over 20 and humidity percentage over 40.
Less than 175

20. Geophysical and investigation for site geology (90 stations)

21. Earthquakes greater than M5.0 during the past 25 years

22. List of destructive earthquakes the last 25 years
225 Earthquakes with Magnitude between 5-6
22 Earthquakes with Magnitude between 6-7
6 Earthquakes with Magnitude >7

23. Number of Earthquakes with Magnitude >5
(Tabas,Koliboyabad, sirch, Manjil, Garmkhan, Ardakul)
22 Earthquake between 6-7
225 Earthquake between 5-6

24. Changureh-Avaj Earthquake of June 22, 2002
Time: 02:58: Mw= PGA :0.498 g Total accelerograms: Maximum intensity:VIII

25. شدت زمينلرزه
گستره ناحيه بيشترين شدت زمينلرزه نسبتا محدود بوده و شهرهاي بم و بروات و روستاهاي پيرامون آنها را در بر مي گيرد.
بر اساس بر آورد ما بيشينه شدت براساس مقياس مركالي اصلاح شده در بخشهايي از بم و بروات IX بوده است.

27. شبكه
شتابنگاري
منطقه بم
پس از زلزله

28. Bam castle
Bam
Baravat
Bam fault

29. Governor of Bam

30. Accelerograph of Bam station

31. Tehran S trong Motion Network

32. Strong motion network in Tehran Province
Total accelerographs:86
Total accelerograms recorded:56

33. Tehran city strong motion network
Number of accelerographs:45
Number of accelerograms:21
Tehran city strong motion network