The seismicity of Iran. The Kaj Darakht, Khurasan, earthquake of 25lh May, 1923
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Abstract
SUMMARY - The Kaj Darakht earthquake of 25th May 1923 had a magnitude
of 5.8 and occurred in a densely populated area of Khurasan, near Turbat-i
Haidariyyeh. It affected an area of about 60 square kilometres and caused the
death of about 900 people. The earthquake was felt within a radius of 130
kilometres and its epicentre is located on the Doruneh fault-zone. Originally
calculated and recently re-calculated positions of its epicentre place the event 230
to 530 kilometres from its actual location. A re-examination of this event demonstrates
the need for a critical study of early and more recent instrumental
locations of events in regions of poor coverage from the world seismological
network.
of 5.8 and occurred in a densely populated area of Khurasan, near Turbat-i
Haidariyyeh. It affected an area of about 60 square kilometres and caused the
death of about 900 people. The earthquake was felt within a radius of 130
kilometres and its epicentre is located on the Doruneh fault-zone. Originally
calculated and recently re-calculated positions of its epicentre place the event 230
to 530 kilometres from its actual location. A re-examination of this event demonstrates
the need for a critical study of early and more recent instrumental
locations of events in regions of poor coverage from the world seismological
network.
Article Details
How to Cite
AMBRASEYS, N. N. and MOINFAR, A. A. (1977) “The seismicity of Iran. The Kaj Darakht, Khurasan, earthquake of 25lh May, 1923”, Annals of Geophysics, 30(1-2), pp. 3–18. doi: 10.4401/ag-4813.
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