Seismic sequence in Almaty (Kazakhstan) 1-2 May 2011

Last update: 3 May 2011 at 07:35 UTC

Since 1st May 2011, the region of Eastern Kazakhstan is experiencing an important seismic activity with more than 8 events of magnitude larger 4.0 in 2 days. The main shock of magnitude Mw 5.4 occurred on May 1st at 02:31 UTC, 76km North East of Almaty. There were no immediate reports of damage or casualties. More information on this main shock is available here.

List of earthquakes of the Almaty seismic sequence:

Date Location Depth Magnitude Felt event
2011-05-02   02:31:09.0 43.70 N  77.54 E 2 mb 4.2 map
2011-05-01   23:52:39.9 43.61 N  77.69 E 1 mb 4.1  
2011-05-01   23:27:25.6 43.60 N  77.70 E 1 mb 4.1  
2011-05-01   20:29:04.0 43.74 N  77.64 E 15 mb 4.7 map
2011-05-01   11:37:11.0 43.81 N  77.45 E 20 mb 4.9 map
2011-05-01   09:13:55.0 43.64 N  77.63 E 20 mb 4.8 map
2011-05-01   07:41:39.0 43.68 N  77.64 E 2 mb 3.5  
2011-05-01   04:07:02.5 43.65 N  77.70 E 1 mb 3.2  
2011-05-01   03:05:49.7 43.70 N  77.69 E 3 mb 4.0  
2011-05-01   02:31:29.0 43.63 N  77.76 E 23 Mw 5.4 map

These earthquakes occurred within the Kazakhstan platform, which lies North of the Tien Shan Mountains. The Tien Shan region  is a  highly seismic area at the boundary between the Tarim bassin and the stable Kazakhstan platform, resulting from the  complex Indian plate subduction under the Eurasian plate.
On January 3rd, 1911, the Kebin earthquake of magnitude 8.2 struck the city of Almaty, making 450 victims. It occurred about 100km from the May 1st 2011 earthquake. (source: T. Utsu ; International Handbook of Earthquake and Engineering Seismology; vol. A; 691-718). On June 8th 1887, a similar event of magnitude 7.3 took place.

If you have experienced one of these earthquakes, you are invited to answer the online questionnaire. Your testimony will be useful to update the Intensity map below, where intensities correspond to the effects of the earthquake.


Aftershocks locations


Regional seismicity

Felt & Damage reports

This earthquake sequence was widely felt by the population while there were no immediate reports of damage or casualties. Information provided by witnesses are available here.


Felt map of the Almaty main shock Mw 5.4 2011/05/01 02:31UTC

(generated with the results of the online questionnaire)
(click to enlarge)


Send us pictures or videos

You were on the spot and you have taken photos or videos of earthquake effects (on buildings, ground, landscape), please send us your files. Send them by mail, MMS or upload them directly from your computer. Just click on the link below :

Send us pictures or videos of the main shock effects
After validation your files will be displayed on this page.

Epicenter location

Main Shock Epicenter Location
Moment Tensors Solutions