The red marker on the map is the epicenter of the second earthquake, the origin of which was in the province of Kahramanmaras, Turkey, at a depth of 10 km, 85 km N-NE of the first strong earthquake on February 6, 2023 at 01:17, 55 km to NE of Kahramanmaras, 105 km N-NW of Gaziantep, 430 km SE of Ankara, the capital of Turkey.
|
Time in origin (GMT) |
Latitude, degree |
Longitude, degree |
Depth, km |
Stations number |
Ms/N |
mb/N |
I0 (calculated) |
GAP |
Center |
1
|
10:24:49.0
|
38.04 |
37.18 |
10.0 |
62
|
7.8/30 |
6.9/28 |
11-11.5 |
65
|
GS RAS(Verified) Federal research center, Geophysical survey of Russian Academy of Sciences
|
2
|
10:24:54.2
|
38.27 |
37.11 |
33.0 |
28
|
|
6.8/28 |
7.5-8 |
|
GS RAS(Preliminary) Federal research center, Geophysical survey of Russian Academy of Sciences
|
3
|
10:24:49.6
|
38.1 |
37.24 |
10.0 |
879
|
Mw 7.5 |
|
|
12
|
CSEM European - Mediterranean seismological center
|
4
|
10:24:49.3
|
38.02 |
37.2 |
10.0 |
135
|
Mw 7.5/58 |
6.7/99 |
|
17
|
NEIC National Earthquakes Information Center of US Geological Service
|
Fig. 1 presents fragments of records obtained from digital stations Vesyoloye (∆ 5.8º), Garni (∆ 6.27º), Khabaz (∆ 7.1º), Kislovodsk (∆ 7.2º), Belogornoye (∆ 16.1º), Obninsk (∆ 17.1º). Fig. 2 presents fragments of records obtained from digital stations Калининград (∆ 20.5º), Kirov (∆ 22º), Pulkovo (∆ 22.2º), Arti (∆ 23.2º), Ala-Archa (∆ 28.7º), Lovozero (∆ 29.9º).
Image 1
Image 2
The aftershock process continued after the second strong earthquake. GS RAS registered 43 aftershocks with М>=4.5 within 26 hours after the second main shock.
N |
Time in origin (GMT) |
Latitude, degree |
Longitude, degree |
Depth, km |
Stations number |
Ms/N |
mb/N |
I0 (calculated) |
Region |
20230550
|
06/02/2023 10:36:00.0.0 |
38.23 |
37.73 |
10.0 |
27 |
|
5.7/19 |
7-7.5 |
Turkey
|
20230551
|
06/02/2023 10:51:32.0.0 |
38.26 |
38.2 |
10.0 |
40 |
|
5.9/25 |
7.5-8 |
Turkey
|
20230561
|
06/02/2023 11:01:34.0.0 |
37.49 |
37.27 |
10.0 |
17 |
|
5.0/12 |
5-5.5 |
Turkey
|
20230552
|
06/02/2023 11:05:37.0.0 |
37.94 |
36.79 |
10.0 |
27 |
|
5.1/19 |
5.5-6 |
Turkey
|
20230555
|
06/02/2023 11:11:43.0.0 |
38.1 |
37.35 |
10.0 |
34 |
|
5.0/14 |
5-5.5 |
Turkey
|
20230553
|
06/02/2023 11:35:30.0.0 |
38.17 |
37.58 |
10.0 |
21 |
|
4.6/15 |
4.5 |
Turkey
|
20230554
|
06/02/2023 11:39:41.0.0 |
38.07 |
36.5 |
10.0 |
23 |
|
4.8/18 |
4.5-5 |
Turkey
|
20230556
|
06/02/2023 11:58:37.0.0 |
38.05 |
37.57 |
10.0 |
30 |
|
4.9/14 |
5-5.5 |
Turkey
|
20230557
|
06/02/2023 12:02:13.0.0 |
38.25 |
36.4 |
10.0 |
56 |
|
5.9/37 |
7.5-8 |
Turkey
|
20230559
|
06/02/2023 12:13:47.0.0 |
37.98 |
37.52 |
10.0 |
27 |
|
4.8/20 |
4.5-5 |
Turkey
|
20230560
|
06/02/2023 12:34:44.0.0 |
38.23 |
38.25 |
10.0 |
28 |
|
4.9/22 |
5-5.5 |
Turkey
|
20230562
|
06/02/2023 12:36:37.0.0 |
38.08 |
38.04 |
10.0 |
16 |
|
4.7/6 |
4.5-5 |
Turkey
|
20230564
|
06/02/2023 13:07:44.0.0 |
38.01 |
37.49 |
10.0 |
36 |
|
5.2/24 |
5.5-6 |
Turkey
|
20230563
|
06/02/2023 13:17:43.0.0 |
38.07 |
36.51 |
10.0 |
23 |
|
4.9/22 |
5-5.5 |
Turkey
|
20230565
|
06/02/2023 13:39:17.0.0 |
37.58 |
37.07 |
10.0 |
28 |
|
5.2/21 |
5.5-6 |
Turkey
|
20230566
|
06/02/2023 13:44:51.0.0 |
37.93 |
37.52 |
10.0 |
37 |
|
5.2/16 |
5.5-6 |
Turkey
|
20230568
|
06/02/2023 15:14:36.0.0 |
38.09 |
37.65 |
10.0 |
45 |
|
5.4/24 |
6-6.5 |
Turkey
|
20230567
|
06/02/2023 15:33:35.0.0 |
38.39 |
38.1 |
10.0 |
43 |
|
5.2/31 |
5.5-6 |
Turkey
|
20230569
|
06/02/2023 16:26:39.0.0 |
37.97 |
36.46 |
10.0 |
24 |
|
4.9/21 |
5-5.5 |
Turkey
|
20230571
|
06/02/2023 16:32:14.0.0 |
36.87 |
36.4 |
10.0 |
29 |
|
4.9/17 |
5-5.5 |
Jordan - Syria region
|
20230570
|
06/02/2023 16:43:31.0.0 |
38.1 |
36.46 |
10.0 |
43 |
|
5.0/27 |
5-5.5 |
Turkey
|
20230573
|
06/02/2023 18:03:56.0.0 |
38.1 |
36.46 |
10.0 |
35 |
|
5.2/16 |
5.5-6 |
Turkey
|
20230572
|
06/02/2023 20:05:37.0.0 |
38.14 |
36.23 |
10.0 |
37 |
|
4.8/25 |
4.5-5 |
Turkey
|
20230574
|
06/02/2023 20:37:53.0.0 |
37.31 |
36.97 |
10.0 |
44 |
|
5.3/28 |
6-6.5 |
Turkey
|
20230576
|
06/02/2023 20:44:02.0.0 |
38.06 |
36.66 |
10.0 |
29 |
|
5.0/15 |
5-5.5 |
Turkey
|
20230577
|
06/02/2023 20:53:25.0.0 |
38.35 |
38.19 |
10.0 |
33 |
|
5.0/22 |
5-5.5 |
Turkey
|
20230578
|
06/02/2023 21:15:20.0.0 |
38.19 |
37.07 |
10.0 |
43 |
|
5.1/22 |
5.5-6 |
Turkey
|
20230580
|
06/02/2023 21:57:45.0.0 |
38.11 |
36.59 |
10.0 |
44 |
|
5.2/18 |
5.5-6 |
Turkey
|
20230581
|
07/02/2023 02:47:37.0.0 |
35.75 |
35.91 |
10.0 |
30 |
|
4.9/20 |
5-5.5 |
Jordan - Syria region
|
20230583
|
07/02/2023 03:08:58.0.0 |
37.86 |
37.42 |
10.0 |
42 |
|
4.7/9 |
4.5-5 |
Turkey
|
20230584
|
07/02/2023 03:13:14.0.0 |
37.94 |
37.66 |
10.0 |
45 |
|
5.6/31 |
6.5-7 |
Turkey
|
20230585
|
07/02/2023 03:37:03.0.0 |
36.45 |
36.3 |
10.0 |
31 |
|
4.5/10 |
4-4.5 |
Jordan - Syria region
|
20230586
|
07/02/2023 05:26:31.0.0 |
36.16 |
36.41 |
10.0 |
31 |
|
4.6/14 |
4.5 |
Jordan - Syria region
|
20230589
|
07/02/2023 06:40:57.0.0 |
38.06 |
36.48 |
10.0 |
30 |
|
4.6/12 |
4.5 |
Turkey
|
20230590
|
07/02/2023 06:48:52.0.0 |
38.25 |
37.66 |
10.0 |
43 |
|
4.8/16 |
4.5-5 |
Turkey
|
20230591
|
07/02/2023 07:11:16.0.0 |
38.23 |
38.6 |
10.0 |
58 |
|
5.5/31 |
6.5-7 |
Turkey
|
20230592
|
07/02/2023 07:26:37.0.0 |
38.19 |
37.67 |
10.0 |
30 |
|
4.5/10 |
4-4.5 |
Turkey
|
20230593
|
07/02/2023 08:25:47.0.0 |
37.88 |
37.32 |
10.0 |
39 |
|
4.6/21 |
4.5 |
Turkey
|
20230595
|
07/02/2023 10:18:15.0.0 |
38.21 |
38.44 |
10.0 |
45 |
|
5.3/22 |
6-6.5 |
Turkey
|
20230596
|
07/02/2023 10:27:33.0.0 |
38.38 |
38.11 |
10.0 |
30 |
|
4.7/14 |
4.5-5 |
Turkey
|
20230597
|
07/02/2023 10:53:21.0.0 |
40.09 |
23.5 |
10.0 |
29 |
|
4.7/22 |
4.5-5 |
Greece
|
20230598
|
07/02/2023 10:57:46.0.0 |
37.64 |
36.66 |
10.0 |
17 |
|
4.5/12 |
4-4.5 |
Turkey
|
20230599
|
07/02/2023 12:07:05.0.0 |
38.31 |
38.38 |
10.0 |
29 |
|
4.6/15 |
4.5 |
Turkey
|
Focal mechanism solution of the origin was calculated in GS RAS with signs of initial arrivals of P waves at 98 stations, including 58
stations which registered compression waves (plus signs), and 40 stations which registered tensile waves (minus signs). The stations are located in the interval of epicentral distances of 3.2-89.4º and in azimuth sector Az=0.8-358.1º. 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 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 action of similar in magnitude compressive stresses oriented SW (AZ=214-232º) and compression stresses oriented E-SE (AZ=191-121º) according to GS RAS and LDEO GCMT and SE (AZ=141º) according to USGS NEIC. One nodal plane NP1 strikes W-SW (STK=250º) according to GS RAS and SW (STK=261-277º) according to USGS NEIC and LDEO GCMT, another plane NP2 strikes north (STK=352-358º) according to GS RAS and LDEO GCMT and south (STK=186º) according to USGS NEIC. According to GS RAS and LDEO GCMT NP1 plane is dipping less steeply (DP=42-59º) if compared with NP2 (DP=71-84º) while according to USGS NEIC both planes are steeply dipping to the horizon (DIP=78-87º). The type of mtion along NP1 is left lateral slip, along NP2 right lateral slip with normal fault component according to GS RAS and LDEO GCMT and right lateral slip according to USGS NEIC. Seismic moment from USGS NEIC data makes Mo=2.637*10**20 N*m, Mw=7.6 and according to LDEO GCMT it makes Mo=4.97*10**20 N*m, Mw=7.7.
Axes of main strengths |
Nodal planes |
Center |
|
T |
P |
N |
NP1 |
NP2 |
PI: 8
Azm: 119
|
PI: 36
Azm: 214
|
PI: 53
Azm: 18
|
Stk: 250
Dp: 59
Slip: -22
|
Stk: 352
Dp: 71
Slip: -147
|
GS RAS Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
PI: 11
Azm: 141
|
PI: 6
Azm: 232
|
PI: 77
Azm: 351
|
Stk: 277
Dp: 78
Slip: 4
|
Stk: 186
Dp: 87
Slip: 168
|
NEIC National Earthquakes Information Center of US Geological Service
|
|
PI: 27
Azm: 120
|
PI: 36
Azm: 232
|
PI: 42
Azm: 3
|
Stk: 261
Dp: 42
Slip: -8
|
Stk: 358
Dp: 84
Slip: -132
|
GCMT Lamont-Doherty Earth Observatory Global CMT Columbia University, USA
|
|