Magnitude 7.3 - SOUTHWESTERN SIBERIA, RUSSIA
2003 September 27 11:33:25 UTC
Preliminary Earthquake Report
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| Magnitude |
7.3 |
| Date-Time |
Saturday, September 27, 2003 at 11:33:25 (UTC)
= Coordinated Universal Time
Saturday, September 27, 2003 at 6:33:25 PM
= local time at epicenter
Time of Earthquake in other Time Zones
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| Location |
49.954°N, 87.832°E |
| Depth |
18 km (11 miles) set by location program |
| Region |
SOUTHWESTERN SIBERIA, RUSSIA |
| Distances |
35 km (20 miles) WSW of Chaganuzun, Russia
240 km (150 miles) N of Altay, Xinjiang, China
300 km (185 miles) W of Ulaangom, Mongolia
3360 km (2090 miles) E of MOSCOW, Russia
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| Location Uncertainty |
horizontal +/- 4.5 km (2.8 miles); depth fixed by location program |
| Parameters |
Nst=352, Nph=380, Dmin=243.5 km, Rmss=1.13 sec, Gp= 25°,
M-type=teleseismic moment magnitude (Mw), Version=U
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| Comments |
Unconfirmed reports of 3 people who died from heart attacks, more than 5 injured, 1,800 homeless,
300 houses destroyed (X); 1,942 buildings damaged, infrastructure damaged and landslides occurred in
the Kosh-Agach and Ust-Ulagan area. Significant damage also reported at Ongudai and Shebalino.
Damage estimated at 10.6 million U.S. dollars. Ground subsidence occurred in the Chaganuzun area
which created a flood of the Chuya River. Felt (VI) at Prokop'yevsk and Tashtagol; (V) at
Novosibirsk; (IV) at Abakan; (III) at Barnaul, Kemerovo, Krasnoyarsk and Zaysan. Felt throughout
southern Siberia. Also felt (IV) at Ust'-Kamenogorsk and Semipalatinsk; (III) at Alma-ata, Astana,
and Taldyqorghan, Kazakhstan.
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| Source |
USGS NEIC (WDCS-D)
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| Event ID |
uszfak |
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Tectonic Summary
This earthquake resulted from stresses originating with the collision
of the
Indian plate against the Eurasian plate. The collision of the two major
plates has generated the Himalayan mountains, far to the south of the
epicenter
of this earthquake, and produces deformation of the
earth's crust over a broad region of central and eastern Asia. In the
epicentral region of southern Russia, north-western China, eastern
Kazakhstan,
and western Mongolia, earthquakes of past decades have been caused by
strike-slip faulting (as with this earthquake) and reverse faulting.
This earthquake is the largest
in this region since
an earthquake on December 20, 1761 that is thought to have had
a magnitude of about 7.7.
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Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
