The red marker on the map is the epicenter of the earthquake, the origin of which was in the Pacific Ocean east of the Kuril Islands, at a depth of 50 km, 157 km S of Severo-Kurilsk, 249 km S-SE of Ozernovskoye and 465 km SW of Petropavlovsk-Kamchatsky.
|
Time in origin (GMT) |
Latitude, degree |
Longitude, degree |
Depth, km |
Stations number |
Ms/N |
mb/N |
I0 (calculated) |
GAP |
Center |
| 1
|
14:38:04.0
|
49.28 |
155.79 |
50.0 |
58
|
6.1/25 |
6.0/22 |
6-6.5 |
150
|
GS RAS(Verified) Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
2
|
14:38:05.9
|
49.21 |
156.17 |
100.0 |
12
|
|
6.1/10 |
4.5-5 |
207
|
GS RAS(Preliminary) Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
3
|
14:38:00.3
|
49.14 |
156.0 |
42.6 |
54
|
Ks 14.7/16 |
|
|
|
KAGSR Kamchatka Regional Seismological Centre, Petropavlovsk-Kamchatskiy, Geophysical Survey, Russian Academy of Sciences
|
|
4
|
14:38:04.1
|
49.4 |
155.62 |
40.0 |
962
|
Mw 6.2 |
5.9/458 |
|
15
|
CSEM European - Mediterranean seismological center
|
|
5
|
14:38:05.1
|
49.4 |
155.7 |
48.6 |
203
|
Mw 6.2/69 |
|
|
38
|
NEIC National Earthquakes Information Center of US Geological Service
|
Fig. 1 presents fragments of records obtained from digital stations Petropavlovsk (∆ 4.2º), Yuzhno-Kurilsk (∆ 8.6º), Yuzhno-Sakhalinsk (∆ 9.0º), Magadan (∆ 10.7º), Seimchan (∆ 13.8º). Fig. 2 presents fragments of records obtained from digital stations Kuldur (∆ 15.7º), Yakutsk (∆ 19.3º), Bilibino (∆ 19.6º), Tiksi (∆ 25.6º), Ulaanbaatar (∆ 31.8º).
Image 1
Image 2
According to Kamchatka Branch of GS RAS the earthquake was felt in Severo-Kurilsk with intensity of 4 MSK, in Ozernovskiy with intensity of 3-4 MSK, in Pauzhetka with intensity of 3 MSK, and in Petropavlovsk-Kamchatskiy with intensity of 2-3 MSK.
Focal mechanism solution of the origin was calculated by GS RAS with signs of initial arrivals of P waves at 74 stations, including 56 stations which registered compression waves (plus signs), and 18 stations which registered tensile waves (minus signs). The stations are located in the epicentral interval of1.4-85.1º and azimuth sector Az= 9-354º. Focal mechanism solution in stereographic projection on the lower hemisphere and elements of the mechanism are presented in the table. The table also contains focal mechanism solutions obtained at the USGS NEIC with W-phase Moment Tensor (Mww) technique and at the German Research Centre for Geosciences (GFZ), Germany. Solutions based on data from different centers are close. The earthquake occurred under the action of The earthquake occurred under prevailing action of compression stresses oriented SE (AZ=124-136º). One nodal plane NP1 strikes SW (STK=216-227º), another plane NP2 strikes NE (STK=32-44º). NP1 plane is dipping more horizontally (DP=30-34º) if compared with NP2 (DP=56-60º). The type of motion along both planes – reverse fault. The seismic moment of the earthquake was obtained in GS RAS from the spectrum of P waves registered at station "Obninsk" (∆64.2º), it makes Mo=2.851*10**18 N*m, Mw=6.3. According to USGS NEIC it makes Mo= 2.189*10**18 N*m, Mww=6.2. According to GFZ – Mo= 1.792*10**18 N*m, Mww=6.1.
| Axes of main strengths |
Nodal planes |
Center |
|
| T |
P |
N |
NP1 |
NP2 |
PI: 77
Azm: 311
|
PI: 13
Azm: 136
|
PI: 1
Azm: 45
|
Stk: 227
Dp: 32
Slip: 92
|
Stk: 44
Dp: 58
Slip: 89
|
GS RAS Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
PI: 77
Azm: 282
|
PI: 12
Azm: 129
|
PI: 6
Azm: 38
|
Stk: 227
Dp: 34
Slip: 100
|
Stk: 34
Dp: 56
Slip: 83
|
NEIC National Earthquakes Information Center of US Geological Service
|
|
PI: 74
Azm: 297
|
PI: 15
Azm: 124
|
PI: 2
Azm: 33
|
Stk: 216
Dp: 30
Slip: 93
|
Stk: 32
Dp: 60
Slip: 88
|
GFZ German Research Center for Geosciences
|
|