1.   Earthquake-prone Iran is rocked by hundreds of tremors every year, including powerful quakes that cause extensive damage and casualties.

2.   Earthquake-prone Iran is rocked by hundreds of tremors every year.

3.   Iran is earthquake-prone and is rocked by hundreds of tremors every year, some of which cause widespread damage.

4.   Iran is prone to earthquakes and suffers scores of small tremors every year.

5.   Iran is earthquake-prone and is rocked by hundreds of tremors every year, including powerful quakes which cause extensive material damage and casualties.

6.   Iran is earthquake-prone and is rocked by hundreds of tremors every year, including some powerful one which cause extensive material damage and casualties.

7.   Iran is earthquake-prone and is rocked by hundreds of tremors every year, some of which are deadly and cause widespread damage.

8.   Iran is prone to earthquakes and experiences hundreds of small tremors every year.

9.   Iran is prone to earthquakes and experiences scores of small tremors every year.

10.   Iran is prone to earthquakes and experiences thousands of small tremors every year.