The red marker on the map shows the epicenter of the earthquake, the origin was located in South Xinjiang, China, at a depth of 10 km, 103 km E-NE of Kashgar, China, 383 km S of Almaty, Kazakhstan, 394 km SE of Bishkek, the capital Kyrgyzstan.
|
Time in origin (GMT) |
Latitude, degree |
Longitude, degree |
Depth, km |
Stations number |
Ms/N |
mb/N |
I0 (calculated) |
GAP |
Center |
| 1
|
13:27:55.1
|
39.8 |
77.12 |
10.0 |
66
|
6.0/41 |
6.0/36 |
8.5 |
52
|
GS RAS(Verified) Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
2
|
13:27:57.8
|
40.03 |
77.1 |
16.0 |
16
|
|
5.9/11 |
7.5-8 |
|
GS RAS(Preliminary) Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
3
|
13:27:57.8
|
39.84 |
77.13 |
10.0 |
241
|
Mw 5.8 |
|
|
23
|
CSEM European - Mediterranean seismological center
|
|
4
|
13:27:57.9
|
39.87 |
77.15 |
11.0 |
171
|
Mw 6 |
5.8 |
|
28
|
NEIC National Earthquakes Information Center of US Geological Service
|
|
5
|
13:27:57.0
|
39.88 |
77.21 |
10.0 |
|
|
6.0 |
|
|
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 Ala-Archa (∆ 3.5º), Makanchi Arr Point (∆ 7.9º), Kurchatov (∆ 11º), Burabay (∆ 14), Zalesovo (∆ 15.1º). Fig. 2 presents fragments of records obtained from digital stations Arti (∆ 20.7º), Talaya (∆ 21.9º), Ulaanbaatar (∆ 22.9º), Belogornoye (∆ 23.8º), Garni (∆ 24.8º).
Image 1
Image 2
GS RAS registered four aftershocks with М>=4.5 within 2 hours 12 minutes after the main shock.
| N |
Time in origin (GMT) |
Latitude, degree |
Longitude, degree |
Depth, km |
Stations number |
Ms/N |
mb/N |
I0 (calculated) |
Region |
| 20200259
|
19/01/2020 13:51:50.0.0 |
39.87 |
77.31 |
10.0 |
20 |
|
4.5/6 |
4-4.5 |
Southern Xinjiang, China
|
| 20200260
|
19/01/2020 14:23:00.0.0 |
39.81 |
77.42 |
10.0 |
48 |
|
5.1/21 |
5.5-6 |
Southern Xinjiang, China
|
| 20200261
|
19/01/2020 14:55:10.0.0 |
39.89 |
77.49 |
10.0 |
27 |
|
5.0/11 |
5-5.5 |
Southern Xinjiang, China
|
| 20200262
|
19/01/2020 15:49:30.0.0 |
39.93 |
77.38 |
10.0 |
18 |
|
4.7/10 |
4.5-5 |
Southern Xinjiang, China
|
The focal mechanism solution of the origin was calculated in GS RAS with signs of initial arrivals of P waves at 37 stations, including 17 stations which registered compression waves (plus signs) and 20 stations which registered tensile waves (minus signs). These stations are located in the interval of epicentral distances of 2-71.4º and in azimuth sector Az=5-313º. The focal mechanism solution in stereographic projection on the lower hemisphere and its elements are presented in the table. The table also contains focal mechanism solutions obtained at the USGS NEIC with WW-phase Moment Tensor (Mww) technique and in Lamont-Dohert Earth Observatory of Columbia University, USA (LDEO GCMT) with СМТ (Centroid moment tensor) technique. Solutions from different centers are close. The earthquake occurred under the influence of a slight prevalence of compression stresses oriented to the southeast (AZ=128-147º). One nodal plane NP1 strikes S-SE (STK=164º) according to GS RAS and S-SW (STK=196-221º) according to USGS NEIC and LDEO GCMT, another plane NP2 strkes E-NE (STK=60º-81º). NP1 plane is flatter (DP=20-37º) compared with NP2 (DP=71-85º). The type of motion for NP1 – left latteral slip according to GS RAS, thrust according to USGS NEIC and left latteral slip with reverse fault component according to LDEO GCMT, for NP2 – reverse fault with right latteral slip component according to GS RAS and LDEO GCMT and reverse fault according to USGS NEIC. Seismic moment according to USGS NEIC Mo=1.387*10**18 N*m, Mww=6.0. Seismic moment according to LDEO GCMT Mo=1.47*10**18 N*m, Mw=6.0.
| Axes of main strengths |
Nodal planes |
Center |
|
| T |
P |
N |
NP1 |
NP2 |
PI: 39
Azm: 10
|
PI: 30
Azm: 128
|
PI: 36
Azm: 243
|
Stk: 164
Dp: 37
Slip: 9
|
Stk: 67
Dp: 85
Slip: 126
|
GS RAS Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
PI: 63
Azm: 339
|
PI: 26
Azm: 145
|
PI: 6
Azm: 238
|
Stk: 221
Dp: 20
Slip: 72
|
Stk: 60
Dp: 71
Slip: 96
|
NEIC National Earthquakes Information Center of US Geological Service
|
|
PI: 51
Azm: 29
|
PI: 20
Azm: 147
|
PI: 31
Azm: 250
|
Stk: 196
Dp: 37
Slip: 30
|
Stk: 81
Dp: 72
Slip: 123
|
GCMT Lamont-Doherty Earth Observatory Global CMT Columbia University, USA
|
|