The red marker on the map indicates the epicenter of the earthquake, its focus was in the province of North Xinjiang, China on the border with Kazakhstan, at a depth of 10 km, 365 km E-SE of Taldykorgan, Kazakhstan, 382 km W-NW of Urumqi, China and 492 km E-N-E of Almaty, Kazakhstan.
|
Time in origin (GMT) |
Latitude, degree |
Longitude, degree |
Depth, km |
Stations number |
Ms/N |
mb/N |
I0 (calculated) |
GAP |
Center |
| 1
|
23:27:49.1
|
44.34 |
82.86 |
10.0 |
65
|
6.5/27 |
6.5/28 |
9-9.5 |
88
|
GS RAS(Verified) Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
2
|
23:27:50.9
|
44.42 |
82.87 |
10.0 |
21
|
|
6.4/17 |
8.5-9 |
|
GS RAS(Preliminary) Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
3
|
23:27:54.8
|
44.37 |
82.9 |
30.0 |
561
|
Mw 6.3 |
|
|
19
|
CSEM European - Mediterranean seismological center
|
|
4
|
23:27:53.9
|
44.32 |
82.84 |
25.9 |
116
|
Mw 6.3 |
6.4 |
|
20
|
NEIC National Earthquakes Information Center of US Geological Service
|
|
5
|
23:27:53.9
|
44.48 |
82.24 |
26.0 |
21
|
Mw 6.3 |
6.5 |
|
230
|
KNDC Kazakhstan National Data Center
|
|
6
|
23:28:37.0
|
43.98 |
82.78 |
20.0 |
|
K 14.8 |
6.8 |
|
|
LTD "SEME" LTD "Seismological Experience Methodology Expedition" of JSC "National center for seismological observations and research»
|
Fig. 1 presents fragments of records obtained from digital stations Jazator (∆ 6.2º), Курчатов (∆ 7º), Borovoye (∆ 12º), Ulaanbaatar (∆ 17.1º), Arti (∆ 19.5º). Fig. 2 presents fragments of records obtained from digital stations Belogornoye (∆ 24.6º), Kirov (∆ 24.9º), Norilsk (∆ 25.1º), Kislovodsk (∆ 28.6º), Obninsk (∆ 31.3º).
Image 1
Image 2
GS RAS registered five aftershocks with М>=4.6 within 6 hours after the main shock.
| N |
Time in origin (GMT) |
Latitude, degree |
Longitude, degree |
Depth, km |
Stations number |
Ms/N |
mb/N |
I0 (calculated) |
Region |
| 20172664
|
08/08/2017 23:39:17.0.0 |
44.28 |
82.53 |
10.0 |
17 |
|
5.1/5 |
5.5-6 |
Northern Xinjiang, China
|
| 20172667
|
08/08/2017 23:44:29.0.0 |
44.3 |
82.81 |
10.0 |
34 |
|
5.3/13 |
6-6.5 |
Northern Xinjiang, China
|
| 20172668
|
09/08/2017 00:22:35.0.0 |
44.33 |
82.69 |
10.0 |
29 |
|
4.8/10 |
4.5-5 |
Northern Xinjiang, China
|
| 20172670
|
09/08/2017 00:40:22.0.0 |
44.4 |
82.48 |
10.0 |
27 |
|
4.6/10 |
4.5 |
Northern Xinjiang, China
|
| 20172675
|
09/08/2017 05:22:40.0.0 |
44.35 |
82.78 |
10.0 |
24 |
|
4.8/13 |
4.5-5 |
Northern Xinjiang, China
|
The focal mechanism solution of the origin in the stereographic projection on the lower hemisphere is shown in the table, it was obtained in USGS NEIC with W-phase Moment Tensor (Mww) techniqueand in Lamont-Dohert Earth Observatory, Columbia University, USA (LDEO GCMT) with СМТ (Centroid moment tensor) technique. Solutions obtained in different centers are close.
The earthquake occurred under the action of compression stresses close in magnitude (PL=4-15º) and oriented to the south (AZ=175-181º) and tensile stresses (PL=7º) oriented to the east (AZ=75º). One nodal plane NP1 strikes to the west (STK=255-269º), another NP2 – to the east (STK=92º-94º), Both planes are inclined to the horizon at the angles (DIP=30-60º).
The type of motion along both planes – reverse faults.
The seismic moment obtained in USGS NEIC makes Mo=3.993*10**18 N*m, Mww=6.3. According to LDEO GCMT Mo=3.87*10**18 N*m, Mw=6.3
| Axes of main strengths |
Nodal planes |
Center |
|
| T |
P |
N |
NP1 |
NP2 |
PI: 7
Azm: 75
|
PI: 15
Azm: 181
|
PI: 1
Azm: 272
|
Stk: 269
Dp: 30
Slip: 87
|
Stk: 92
Dp: 60
Slip: 92
|
NEIC National Earthquakes Information Center of US Geological Service
|
|
PI: 79
Azm: 62
|
PI: 4
Azm: 175
|
PI: 10
Azm: 266
|
Stk: 255
Dp: 41
Slip: 75
|
Stk: 94
Dp: 50
Slip: 103
|
GCMT Lamont-Doherty Earth Observatory Global CMT Columbia University, USA
|
|