Tazarj Earthquake of 12 April 1971, Mw=6

Tazarj Earthquake of 12 April 1971, Mw=6

The main shock of Tazarj earthquake occurred at 19:03:25.9 GMT and the instrumental epicenter located at 28.3°N, 55.6°E, with a magnitude of 6.0 and estimated focal depth of 44km. The shaking of the ground lasted 30 seconds. Tazarj was worst hit, then Barghany Bala and Barghany Pa’in. Other damaged villages were Baraftab, Daragah, Laibisheh and Madanujeh. A total of 100 houses collapsed in the region. Some qanats collapsed, one person was killed and three or four injured. It is said that were two shocks: the first was slight and warned the population, the second being the main shock.

The recorded aftershocks are summarized below:

* April 13:  20:4:00 GMT, 28.2°N, 55.6°E, Mb=4.8, F.D=44km.

* April 14:  06.15 local time, a few houses already damaged in the Tazarj area collapsed. The shock was felt in Hadjiabad and Bandar Abbas.

* April 15:  10.45 local time, in Tazarj.

* April 19:  midnight onwards, shocks in Tazarj and Barghany.

The recorded intensities  of the 1971 Tazarj earthquake are summarized in the below table (Berberian & Tchalenko, 1976):

Tazarj	A few houses collapsed, all others were fissured (120-150). About 100-150 sheeps were killed due to stable ceilings collapsing. About 150,000 Rials estimated for sheep, 400,000 Rials for qanat repairs. Rockfalls were reported from nearby mountains.
Barghany	Five to six houses collapsed and the remainder badly fissured. One person killed. Rockfalls nearby.
Baraftab	All houses fissured.
Daragah	Half the houses rendered unfit for rehabilitation, the other half fissured.
Laibisheh	Houses fissured.
Madanuiyeh	All houses fissured.
Bainuj	About 10-12 old houses collapsed and many fissured. Rockfalls in the mountain in the south.
Sargaz	A few old houses collapsed and many fissured.
Dehestan Pa’in	Two shocks were felt but no damage is recorded.
Jaleh Shotori	Houses fissured, rock falls.
Posht Ziarat	Houses fissured, rock falls.
Qalatu	Houses fissured, rock falls, a few collapsed.
Bardinu	Houses fissured, rock falls, a few collapsed.
Ganj	Felt.
Hadjiabad	A few houses fissured.
Bandar Abbas	Felt.
Dehno	Felt, no damage.
Dashtu	Felt, no damage.
Sariran	Felt, no damage.
Forg	A few houses fissured.