Information message about the tangible earthquake in the Kyrgyzstan-Tajikistan border region, June 26, 2016 |
| The tangible earthquake M=6.6 occurred on June 26, 2016 at 11:17 GMT (14:17 Moscow time) in the Kyrgyzstan-Tajikistan border region. |
| Parameters of the earthquake
have been determined in the Alert Service (AS) of Information
Processing Center (IPC) of Geophysical Survey of RAS in Obninsk with station data
obtained from digital and analog seismic stations of Russia, countries of CIS
and from abroad. Alert message on this earthquake has been delivered in 11 min after
registration to the Ministry of Emergency of the Russian Federation (EMERCOM). |
| Preliminary processing has been done with data from 30 stations, accurate processing - with data 58 stations. |
| Fig. 1 presents fragments of records obtained from digital stations Makanchi Array (∆ 9.8º), Kurchatov (∆ 11.8º), Zalesovo Array (∆ 16.4º), Arti (∆ 19.6º), Kungurtug (∆ 20.2º). Fig. 2 presents fragments of records obtained from digital stations Belogornoye (∆ 22º), Garni (∆ 22º), Khabaz (∆ 23.2º), Kislovodsk (∆ 23.3º), Kirov (∆ 24.5º). |
Figure 1
| 
Figure 2
|
|
| IPC GS RAS also has obtained information with parameters of this event from some seismological centers, these data are given in table 1: |
| Table 1 |
| NN |
Time in origin h-min-s (GMT) |
Lat degr. |
Lon degr. |
Depth km |
N s/st |
Ms/ N |
mb/ N |
I0 calc |
GAP |
Center | | 1 |
11-17-09.2 |
39.49 |
73.43 |
15 |
58 |
6.6/29 | 6.4/31 | 8.5-9 | 153 | IPC GS RAS (Accurate) | | 2 |
11-17-09.4 |
39.52 |
73.37 |
10 |
30 |
| 6.1/14 | 8-8.5 | | IPC GS RAS (Preliminary) | | 3 |
11-17-11.5 |
39.53 |
73.47 |
15 |
626 |
Mw 6.4 | | | 34 | CSEM | | 4 |
11-17-11.7 |
39.49 |
73.33 |
15.5 |
252 |
Mw 6.4 | | | 57 | NEIC | | 5 |
17:17:06.0 |
39.41 |
73.68 |
10 |
17 |
K 15 | 6.5 | | | IS NAS KR | | 6 |
11-17-11.6 |
39.47 |
73.23 |
20 |
11 |
Mw 6.3 | 6.1 | | 281 | KNDC | | 7 |
17:17:05.0 |
39.24 |
73.52 |
15 |
|
K 13.8 | 6.5 | | | SI "SEME CS MES RK" | |
| IPC GS RAS - Informational Processing Center, Geophysical Survey, Russian Academy of Sciences |
| CSEM - European - Mediterranean seismological center |
| NEIC - National Earthquakes Information Center of US Geological Service |
| IS NAS KR - Institute of Seismology National Academy of sciences of the Kyrgyz Republic |
| KNDC - Kazakhstan National Data Center |
| SI "SEME CS MES RK" - State Institution "Seismological Experimental and Methodical Expedition of the Committee of Science of the Ministry of Education and Science of the Republic of Kazakhstan" |
| Epicenter |
| Fig.3 presents with red star the epicenter of this earthquake, its origin was located in the Kyrgyzstan-Tajikistan border region, at the depth 15 km, 128 km S-S-E of Osh, Kyrgyzstan, 170 km S-E of Fergana, Uzbekistan, and 223 km W of Kashi, China. |
Figure 3 |
|
| Aftershock |
| GS RAS registered one foreshock one day before the main shock and 14 aftershocks М>=4.3 within one day after.
According to Institute of Seismology of the National Academy of Sciences of the Kyrgyz Republic
aftershock at 11:32 was felt in Bar-Dobo with intensity 4, in Nura with intensity 3-4 MSK;
aftershock at 11:40 was felt in Bar-Dobo with intensity 3 MSK;
aftershock at 18:51 was felt in Bar-Dobo with intensity 5-6, in Kara-Kindik with intensity 4-5, in Nura with intensity 4 MSK;
aftershock of June 27 at 00:37 was felt in Bar-Dobo with intensity 3-4, in Sary-Tash and Kara-Kindik with intensity 2-3 MSK;
aftershock of June 27 at 06:25 was felt in Bar-Dobo with intensity 5-6, in Kara-Kindik with intensity 4-5, in Nura with intensity 4 MSK. |
| N |
Date & Time (GMT)
yy-mm-dd hh:mm:sec |
Lat
degr. |
Lon
degr. |
Depth
km |
N
station |
Ms/ N |
mb/ N |
Io
calc. |
Region |
| 20162293 | 2016-06-25 10:33:36.0 | 39.64 | 73.8 | 10 | 8 | - | 4.2/ 3 | 3.5 | Tajikistan-Xinjiang border reg. | | 20162326 | 2016-06-26 11:40:50.0 | 39.54 | 73.56 | 15 | 25 | - | 4.6/ 13 | 3.5-4 | Tajikistan-Xinjiang border reg. | | 20162325 | 2016-06-26 11:32:45.0 | 39.48 | 73.75 | 15 | 28 | - | 4.7/ 16 | 4-4.5 | Tajikistan-Xinjiang border reg. | | 20162308 | 2016-06-26 12:08:10.0 | 39.38 | 73.65 | 15 | 14 | - | 4.4/ 5 | 3-3.5 | Tajikistan-Xinjiang border reg. | | 20162311 | 2016-06-26 12:21:57.0 | 39.56 | 73.39 | 15 | 17 | - | 4.4/ 10 | 3-3.5 | Tajikistan-Xinjiang border reg. | | 20162313 | 2016-06-26 13:46:19.0 | 39.45 | 73.44 | 15 | 25 | - | 4.5/ 8 | 3.5-4 | Tajikistan-Xinjiang border reg. | | 20162315 | 2016-06-26 14:21:35.0 | 39.44 | 73.53 | 15 | 18 | - | 4.4/ 2 | 3-3.5 | Tajikistan-Xinjiang border reg. | | 20162317 | 2016-06-26 14:58:16.0 | 39.4 | 73.49 | 15 | 15 | - | 4.3/ 6 | 3-3.5 | Tajikistan-Xinjiang border reg. | | 20162314 | 2016-06-26 18:51:10.0 | 39.36 | 73.4 | 15 | 32 | - | 4.6/ 11 | 3.5-4 | Tajikistan-Xinjiang border reg. | | 20162316 | 2016-06-26 20:00:35.0 | 39.45 | 73.51 | 15 | 26 | - | 4.5/ 8 | 3.5-4 | Tajikistan-Xinjiang border reg. | | 20162318 | 2016-06-26 21:16:45.0 | 39.54 | 73.54 | 15 | 23 | - | 4.4/ 5 | 3-3.5 | Tajikistan-Xinjiang border reg. | | 20162322 | 2016-06-27 00:37:50.0 | 39.38 | 73.27 | 15 | 16 | - | 4.4/ 6 | 4 | Tajikistan-Xinjiang border reg. | | 20162324 | 2016-06-27 05:08:21.0 | 39.55 | 73.5 | 15 | 33 | - | 4.7/ 13 | 4-4.5 | Tajikistan-Xinjiang border reg. | | 20162328 | 2016-06-27 06:25:37.0 | 39.45 | 73.3 | 15 | 51 | - | 5.4/ 21 | 6 | Tajikistan-Xinjiang border reg. | | 20162331 | 2016-06-27 07:34:14.0 | 39.55 | 73.52 | 15 | 37 | - | 4.8/ 22 | 4-4.5 | Tajikistan-Xinjiang border reg. | |
| Macroseismic manifestations |
| According to Institute of Seismology of the National Academy of Sciences of the Kyrgyz Republic and Kazakhstan National Data Center this earthquake was felt in Nura, Bar-Dobo with intensity 6, in Sary-Tash, Sary-Mogol, Kara Kindik with intensity 5, in the Osh region with intensity 4-5, in Batken region with intensity 3-4, in Taraz, Shymkent with intensity 2-3 in Almaty with intensity 2 MSK. |
| Historical records |
| The epicenter was located 100 km S-S-W of the epicenter of tangible earthquake of November 17, 2015 М=5.5 and 137 km N-E of the epicenter of tangible earthquake of December 7, 2015 М=7.5 . |
| Focal mechanism and seismic moment of the earthquake |
| Focal mechanism solution of the origin was obtained in IPC GS RAS with signs of initial arrivals of P waves at 74 stations, including 59 stations which registered compression waves (plus signs), and 15 stations which registered tensile waves (minus signs). These stations are located in the interval of epicentral distances 1–99º and dispersed uniformly along the azimuth. Focal mechanism in stereographic projection at lower hemisphere is shown in Fig. 4, elements of this mechanism are presented in Table 2. Fig. 5, 6 and table 2 present focal mechanism solutions obtained in USGS NEIC with Mww technique and in Quick CMT Catalog Center, USA with CMT technique. Elements of these solutions are given in table 2. Solutions obtained in the different centers are close.
This earthquake has occurred under prevailing compression stress oriented north-west (AZ=305-337º). Nodal planes decline to the horizon at nearly the same angles (DP=35º-56º).
In all solutions NP1 planes strikes SW-W (STK=200-273º), NP2 strikes N-E (STK=40º-57º). The type of motion along both planes – reverse fault (with slip component).
Seismic moment obtained in IPC GS RAS with P wave spectra at station «Obninsk» (∆29.05º) Мо=6.8*10**18 N*m, Mw=6.5;
according to USGS NEIC – Mo=4.55*10**18 N*m, Mw=6.4, according to Quick CMT – Mo=4.98*10**18 N*m, Mw=6.4. |
| Table 2 |
| Axes of main strengths |
Nodal planes |
Center |
| T |
P |
N |
NP1 |
NP2 |
| Pl |
Azm |
Pl |
Azm |
Pl |
Azm |
Stk |
Dp |
Slip |
Stk |
Dp |
Slip |
| 68 | 69 | 12 | 305 |
18 | 211 | 200 | 60 | 69 | 57 |
36 | 121 | IPC GS RAS | | 78 | 184 | 10 | 333 |
6 | 64 | 248 | 56 | 97 | 55 |
35 | 79 | NEIC | | 60 | 244 | 2 | 337 |
30 | 68 | 273 | 54 | 128 | 40 |
50 | 50 | Quick CMT | |
| IPC GS RAS - Informational Processing Center, Geophysical Survey, Russian Academy of Sciences |
| NEIC - National Earthquakes Information Center of US Geological Service |
| Quick CMT - Quick CMT catalog |
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