Макросейсмические сведения
о землетрясении 26 декабря 2003 г. (1:56 UTC)
По данным NEIC, USGS
A strong earthquake occurred 180 km (115 miles) SE of Kerman, Iran at 6:56 PM MST,
Dec 25, 2003 (Dec 26 at 5:26 AM local time in Iran). The magnitude and location may
be revised when additional data and further analysis results are available.
At least 5,000 people killed, more than 30,000 injured, 85 per cent of
the buildings damaged or destroyed and the infrastructure damaged at Bam.
This earthquake occurred as the result of stresses generated by the motion
of the Arabian plate northward against the Eurasian plate at a rate of approximately
3 cm/yr (about one inch per year). Deformation of the Earth's crust in response to
the plate motion takes place in a broad zone that spans the entire width of Iran
and extends into Turkmenistan. Earthquakes occur as the result of both reverse
faulting and strike-slip faulting within the zone of deformation.
Preliminary analysis of the pattern of seismic-wave radiation from the December 26
earthquake is consistent with the earthquake having been caused by right-lateral
strike-slip motion on a north-south oriented fault. The earthquake occurred in
a region within which major north-south, right-lateral, strike-slip faults had been
previously mapped, and the epicenter lies near the previously mapped, north-south
oriented, Bam fault. However, field investigations will be necessary to determine
if the earthquake occurred on the Bam fault or on another, possibly not yet mapped,
fault. The December 26 earthquake is 100 km south of the destructive earthquakes of
June 11, 1981 (magnitude 6.6, approximately 3,000 deaths) and July 28, 1981
(magnitude 7.3, approximately 1,500 deaths). These earthquakes were caused by a
combination of reverse-motion and strike-slip motion on the north-south oriented
Gowk fault.
URL:
http://zeus.wdcb.ru/wdcb/sep/strong/20031226/macro.html
Last revision December 29, 2003