The red marker on the map is the epicenter of the earthquake, origin of which was in the waters of Lake Baikal, at a depth of 10 km, 16 km E-NE of Bolshoi Goloustnoye, 99 km E-SE of Irkutsk and 108 km to NW of Gusinoozersk.
|
Time in origin (GMT) |
Latitude, degree |
Longitude, degree |
Depth, km |
Stations number |
Ms/N |
mb/N |
I0 (calculated) |
GAP |
Center |
| 1
|
00:53:54.0
|
52.08 |
105.63 |
10.0 |
53
|
5.1/32 |
5.0/18 |
5-6 |
64
|
GS RAS(Verified) Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
2
|
00:53:58.3
|
51.98 |
105.49 |
33.0 |
19
|
|
5.1/17 |
3.5-4 |
|
GS RAS(Preliminary) Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
3
|
00:53:53.8
|
52.01 |
105.77 |
10.0 |
259
|
|
4.9 |
|
24
|
CSEM European - Mediterranean seismological center
|
|
4
|
00:53:53.5
|
52.05 |
105.71 |
10.0 |
84
|
|
4.9/84 |
|
31
|
NEIC National Earthquakes Information Center of US Geological Service
|
|
5
|
00:53:55.0
|
52.02 |
105.7 |
10.0 |
17
|
K 14.1 |
|
|
|
BAGSR Baykal Regional Seismological Centre, Irkutsk, Geophysical Survey, Russian Academy of Sciences
|
Fig. 1 presents fragments of records obtained from digital stations Irkutsk (∆ 0.9º), Talaya (∆ 1.3º), Zakamensk (∆ 2.3º), Mondy (∆ 2.9º), Orlik (∆ 3.6º). Fig. 2 presents fragments of records obtained from digital stations Jazator (∆ 11.7º), Zalesovo (∆ 12.7º), Yakutsk (∆ 16.3º), Kurchatov (∆ 16.9º), Ussuriysk (∆ 19.2º).
Image 1
Image 2
According to the Baikal Branch of GS RAS the earthquake was felt in Bolshoi Goloustnoe, Maly Goloustnoe, Irkutsk, Gusinoozersk with a magnitude of 5 MSK, in Telma, Molodezhnoy, Dzerzhinsk, Urik, Khomutovo, Markov, Shelekhov, Angarsk, Ulan-Ude, Baklashi, Granovshchina, Sosnovy Bor , Tyrgan with a strength of 4-5 MSK, in the Pad Melnichnaya, Maksimovshchina, Usolye-Sibirsky, Cheremkhovo, Zima, Slyudyanka, Plishkino, Baikalsk, Kamensk, Novozhilkino, Gorny, Semenovsky, Mamonakh, Meget, Sayansk with a strength of 4 MSK, in Elantsy, Dzhida, Tulun, Zungar with a strength of 3-4 MSK, in Balagansk with a strength of 3 MSK.
Focal mechanism solution of the origin for the first earthquake was calculated by GS RAS with signs of initial arrivals of P waves at 37 stations, including 16 stations which registered compression waves (plus signs), and 21 stations which registered tensile waves (minus signs). The stations are located in the epicentral interval of 1.4-91º and in azimuth sector Az=9-308º. Focal mechanism solution in stereographic projection on the lower hemisphere and elements of the mechanism are presented in the table. The table also contains the focal mechanism solution obtained from the German Research Centre for Geosciences (GFZ), Germany. The earthquake occurred under the influence of the prevailing tensile stresses oriented to the northwest (AZ=325º) according to GS RAS and W (AZ=273º) according to GFZ. NP1 plane is more horizontal (DP=20º) if compared with NP2 (DP=71º) according to GS RAS and according to GFZ both planes are dipping at close angles (DP=50-58º). One nodal plane NP1 strikes NE (STK=46º) according to GS RAS and N-NW (STK=332º) according to GFZ, another plane NP2 strikes W-SW (STK=238º) according to GS RAS and S-SW (STK=212º) according to GFZ. The type of motion along NP1 – flat normal fault according to GS RAS and right lateral slip with normal fault component according to GFZ, along NP2 – normal fault according to GS RAS and normal fault with left lateral slip component according to GFZ. Seismic moment according to GFZ makes Mo= 7.2*10**16 N*m, Mww=5.2
| Axes of main strengths |
Nodal planes |
Center |
|
| T |
P |
N |
NP1 |
NP2 |
PI: 26
Azm: 325
|
PI: 64
Azm: 154
|
PI: 4
Azm: 56
|
Stk: 46
Dp: 20
Slip: -101
|
Stk: 238
Dp: 71
Slip: -86
|
GS RAS Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
PI: 4
Azm: 273
|
PI: 54
Azm: 176
|
PI: 34
Azm: 7
|
Stk: 332
Dp: 50
Slip: -137
|
Stk: 212
Dp: 58
Slip: -48
|
GFZ German Research Center for Geosciences
|
|